How to create a script that drop_caches every 1 second? - Android Q&A, Help & Troubleshooting

sync && echo 3 > /proc/sys/vm/drop_caches
Just not sure how to make it run the script over and over again every 1 second?

chris1892006 said:
sync && echo 3 > /proc/sys/vm/drop_caches
Just not sure how to make it run the script over and over again every 1 second?
Click to expand...
Click to collapse
Put an executable script like this
Code:
#!/system/bin/sh
while:; do
sync && { echo 3 > /proc/sys/vm/drop_caches; }
sleep 1
done
into /etc/init.d directory

jwoegerbauer said:
Put an executable script like this
Code:
#!/system/bin/sh
while:; do
sync && { echo 3 > /proc/sys/vm/drop_caches; }
sleep 1
done
into /etc/init.d directory
Click to expand...
Click to collapse
What if I don't have an init.d directory for my rom? How do I install it? Meticulus never added it to the Carbon Rom 4.4.4 kitkat or his 5.1.1 rom for the YP-G70 Samsung Galaxy Player 5.0.

chris1892006 said:
What if I don't have an init.d directory for my rom? How do I install it? Meticulus never added it to the Carbon Rom 4.4.4 kitkat or his 5.1.1 rom for the YP-G70 Samsung Galaxy Player 5.0.
Click to expand...
Click to collapse
If Android is rooted, then you install INIT.D SCRIPTS SUPPORT app - see attachment

i received an error on sm manager

chris1892006 said:
i received an error on sm manager
Click to expand...
Click to collapse
Ah, as I can see suggested script contains a syntax error: a blank is missing between "while" and colon. Sorry for this.
Code:
while :;
Some infos:
https://bash.cyberciti.biz/guide/Infinite_while_loop
https://www.tecmint.com/clear-ram-memory-cache-buffer-and-swap-space-on-linux/

I keep getting syntax errors, can u test the script first and re post a working command possibly? this will work on any android device and is harmless.

chris1892006 said:
I keep getting syntax errors, can u test the script first and re post a working command possibly? this will work on any android device and is harmless.
Click to expand...
Click to collapse
Ran script in Android 7 emularor: NO ERRORS!

jwoegerbauer said:
Ran script in Android 7 emularor: NO ERRORS!
Click to expand...
Click to collapse
Thank you
I ran it like this in SM Manager and I get this error
#!/system/bin/sh
while :; do
sync && { echo 3 > /proc/sys/vm/drop_caches; }
sleep 1
done

Can you also suggest a way to free all memory every 1 second as well? There is this "Other" ram area of ram thats hogging all the ram.

Related

help for a script

hi all
i have an galaxy SIII
i am using script manager.
i want to write a script and i have 2 questions
- how to write a script who open an url with the web browser
- is there an function to send a ping to see if an local adress avalaible (192.168.1.X) if not avalaible is there an return error ?
(sorry to seem stupid but i am coming from windows and i am a bit lost for the moment )
thank u for giving me a your time
no suggestion ?
or advise
Google something like "android open browser from shell". You can do it using intents.
Also:
Code:
ping --help
this work in an script u put
am start -a android.intent.action.VIEW -n com.android.browser/.BrowserActivity http://www.google.fr
for chrome i find this
am start -a android.intent.action.VIEW -n com.android.chrome/.Main -d http://xxxxxxxx
but i not find for opera if someone have it
finally
opera =
am start -a android.intent.action.VIEW -n com.opera.browser/com.opera.Opera -d http://www.google.xxxx
hope this help someone
lol now i really need help coz i found nothing
i want to know which ip is reachable from 192.168.1.(1 to 9)
in a script to automate that and give me wish is reachable for use it in a command to browser.
(i know ping from terminal emulator but it's not what i am looking for)
forgive my english i hope you understand what i want ant hope too u help me with this
kondronaute said:
i want to know which ip is reachable from 192.168.1.(1 to 9)
in a script to automate that and give me wish is reachable for use it in a command to browser...
Click to expand...
Click to collapse
That's easy, check:
Code:
for var in {1..9}
do
echo "Looking for 192.168.1.$var..." #optional... jejeje
if ping 192.168.1.$var -c 1 > /dev/null
then
#Reachable, put here your command
else
#Unreachable, you can show an error here
fi
done
RoberGalarga said:
That's easy, check:
Code:
for var in {1..9}
do
echo "Looking for 192.168.1.$var..." #optional... jejeje
if ping 192.168.1.$var -c 1 > /dev/null
then
#Reachable, put here your command
else
#Unreachable, you can show an error here
fi
done
Click to expand...
Click to collapse
but ping command is not reconized by script manager i can only do it with terminal emulator ....
Really? I didn't know that (weird, BTW). Check if you need to use another command with Script Manager, or if you need to add something.
I dunno another way to achieve your goal... only using ping
lol i have a headeach with this and find nothing
RoberGalarga said:
Really? I didn't know that (weird, BTW). Check if you need to use another command with Script Manager, or if you need to add something.
I dunno another way to achieve your goal... only using ping
Click to expand...
Click to collapse
finally i have possibility to run ping you must just in option of script manager chek "override $PATH"
after 2 or 3 aspirin this work for me
#!/system/bin/sh
for i in $(seq 2 10);
do
host="192.168.1.$i"
ping -c 1 -W 1 $host > /dev/null &&
am start -a android.intent.action.VIEW -n com.android.browser/.BrowserActivity http://$host ;
done
i dont know why i have error with else and if with android shell ????
i thank u again for your help and hope the masters here help us a bit to understand, it's difficult coz there are differences with simple linux and this for french using windows :laugh:
Try if this help.
i have this kind of probleme http://forum.xda-developers.com/showthread.php?t=1045006
but i am usin the script manager editor on my phone !!!!!
i have not Windows EOL formatting
please if u are guru of busybox your help is needed to use if else and fi in a script.
must i download another version of busybox or add a command ????
i am fully rooted the path in script manager is good
edit = after trying and googleing
after if you must put [[your code without space before and after]] and after then (yourcode) :laugh:
hope i find the rest...
kondronaute said:
i have not Windows EOL formatting
Click to expand...
Click to collapse
Are you sure? Because if you have created the script in windows, you have that EOL formatting (whatever that means :silly. Try this:
Open Terminal Emulator, and type
Code:
echo "hello there" > /sdcard/newScript.sh
This will create a new and clean script in your SD Card.
Then, go to Script Manager, and edit that script. You can start deleting the text ("hello there") and adding this:
Code:
testvar=1
if [ "$testvar" = "1" ] ; then
echo "All is right"
fi
Ok, run the script. If you can see the text "All is right", that's it, problem solved
RoberGalarga said:
Are you sure? Because if you have created the script in windows, you have that EOL formatting (whatever that means :silly. Try this:
Open Terminal Emulator, and type
Code:
echo "hello there" > /sdcard/newScript.sh
This will create a new and clean script in your SD Card.
Then, go to Script Manager, and edit that script. You can start deleting the text ("hello there") and adding this:
Code:
testvar=1
if [ "$testvar" = "1" ] ; then
echo "All is right"
fi
Ok, run the script. If you can see the text "All is right", that's it, problem solved
Click to expand...
Click to collapse
you save my last neuron
thanks
edit =
my fault is i create a text file under windows (easier and can copy and past easily) after i put the file on my phone and copy past the code in a new script.
i not think that when i just copy past i past the EOL formatting ( i dont know what is that but its a bad thing )
that's mean i must abandon windows and migrate totally to linux
anyway that make me crazy and i am happy to sort it.
you are very helpfull many thanks again
new edit = i understand now why they say notepad++ is necessary

[KERNEL] [09-10-13] - SM-N9005 - SELinux Permissive - Working WiFi

KERNEL FOR SM-N9005 - SNAPDRAGON 800 MODEL
Successfully changed SELinux status to permissive. Able to restore apps with Titanium Backup with data without force closes.
This is the stock samsung kernel source, but changed the SELinux policy from enforcing to permissive.
In the settings app, it still shows as "Permissive", see the attached image.
Flash at your own risk. Please have an available flashable tar file of a working boot.img just in case, however it works fine on my phone!
Link to stock kernels: http://forum.xda-developers.com/showthread.php?t=2459328&highlight=stock+roms
Known Issues
Wifi and exfat external storage not working
WiFi not working. To fix: modify build.prop ro.securestorage.support=true - Change to false. WiFi works on reboot (Thanks to freeza)
ExFAT external storage not working. To fix: Use https://github.com/dorimanx/exfat-nofuse
Download Here: https://www.dropbox.com/s/8ze2xzk2mcbagyc/DJT_N9005_KERNEL.tar
TODO:
- Add ExFAT to kernel
- Add Busybox / init.d capability
- Add CPU overclocking
For other kernel devs, there is new feature in Snapdragon 800 mtd where you need a different version of mkbootimg tools.
More Information
Some more info:
In the build config specified by Samsung, there is the following:
Code:
CONFIG_SEC_RESTRICT_ROOTING=y
CONFIG_SEC_RESTRICT_SETUID=y
CONFIG_SEC_RESTRICT_FORK=y
CONFIG_SEC_RESTRICT_ROOTING_LOG=y
And the build notes for the kernel say this:
$ make VARIANT_DEFCONFIG=msm8974_sec_hlteeur_defconfig msm8974_sec_defconfig SELINUX_DEFCONFIG=selinux_defconfig
And if we look at the SELINUX Makefile:
Code:
ifeq ($(SEC_BUILD_OPTION_SELINUX_ENFORCE),true)
EXTRA_CFLAGS += -DCONFIG_ALWAYS_ENFORCE=true
endif
My guess is that because we are "supposed" to build with the SELinux flag, then the Makefile picks this up and sets ALWAYS ENFORCE to true. So I am now rebuilding kernel now to try it without that line.
it dose not work on my stock rom
After flashing over Omega ROM 1.0 i lost WIFI (could not activate it) and external storage access.
Still SELinux was indeed permissive and data restore with Titanium was working.
bubbl3 said:
After flashing over Omega ROM 1.0 i lost WIFI (could not activate it) and external storage access.
Still SELinux was indeed permissive and data restore with Titanium was working.
Click to expand...
Click to collapse
Thankyou I will look at fixing this. I also realised lost wifi.
Sent from my SM-N9005 using xda app-developers app
danieljamie said:
Thankyou I will look at fixing this. I also realised lost wifi.
Sent from my SM-N9005 using xda app-developers app
Click to expand...
Click to collapse
Woa, how can you able to flash kernel with locked bootloader ?, how do i create tar and boot.img from the zImage ?
Thanks
rheza02 said:
Woa, how can you able to flash kernel with locked bootloader ?, how do i create tar and boot.img from the zImage ?
Thanks
Click to expand...
Click to collapse
boot.img consists of the kernel and ramdisk. You need ramdisk compiled from source, or ripped from a current working boot.img.
Then use tool mkboot to package zImage and ramdisk into boot.img (not just any mkboot, there is a special one updated for usage with snapdragon 800).
Then just use tar command in linux: tar -cvf mykernel.tar boot.img
Then flash in odin
Does this work with SM-N900W8 version?
Sorry for Out of topic,
do you compile the boot.img with the dt.img ?
Thanks
rheza02 said:
Sorry for Out of topic,
do you compile the boot.img with the dt.img ?
Thanks
Click to expand...
Click to collapse
Yes...
Use this:
https://github.com/xiaolu/mkbootimg_tools
Can you please do it for SM-900 version also ?
Sent from my SM-N900 using XDA Premium 4 mobile app
How do we make the modules for wifi and external storage ?, I able to compile my own kernel now. but can't access external storage and wifi.
rheza02 said:
How do we make the modules for wifi and external storage ?, I able to compile my own kernel now. but can't access external storage and wifi.
Click to expand...
Click to collapse
I'm wondering the same thing brother. I want to open a thread regarding kernel compiling but don't know where to do it or where to get help. Feel so stuck.
Then my dev environment died on me and make started throwing me errors randomly after I did apt-get upgrade.
Sent from my SM-N9005 using xda app-developers app
danieljamie said:
I'm wondering the same thing brother. I want to open a thread regarding kernel compiling but don't know where to do it or where to get help. Feel so stuck.
Then my dev environment died on me and make started throwing me errors randomly after I did apt-get upgrade.
Sent from my SM-N9005 using xda app-developers app
Click to expand...
Click to collapse
Do you have google+ ?, can we chat while doing this. hehe!
rheza02 said:
Do you have google+ ?, can we chat while doing this. hehe!
Click to expand...
Click to collapse
Yeah I will send you a PM
Hi, I'm in the same boat as you guys. I have compiled a kernel successfully and while WiFi works, sdcard/exfat doesn't.
We need to figure out how to get to the bottom of this! Oddly enough, kernel modules are no longer in /system/lib/modules. I guess they're baked into the kernel?
feel free to add me on google+. my xda username @ gmail
freeza said:
Hi, I'm in the same boat as you guys. I have compiled a kernel successfully and while WiFi works, sdcard/exfat doesn't.
We need to figure out how to get to the bottom of this! Oddly enough, kernel modules are no longer in /system/lib/modules. I guess they're baked into the kernel?
feel free to add me on google+. my xda username @ gmail
Click to expand...
Click to collapse
How did you get wifi working???
Sent from my SM-N9005 using xda app-developers app
And what about Exynos kernel?
Code:
parentDir
|-- mkbootimg
|--/XXDEV-ramdisk/
+--/Kernel-folder/
Code:
makeKernel
Code:
#!/bin/sh
export KDIR=`readlink -f ../Kernel-folder/`
if [ -z ${1} ]; then
echo "Enter the device code"
exit 1;
else
export DEV=$1
fi
case $DEV in
XXDEV) export DEFCONFIG="XXDEV_defconfig";
export RDIR="XXDEV-ramdisk";;
*) echo "Not a valid device"
exit 2;;
esac;
cd $KDIR;
echo "Making $DEFCONFIG";
if [ -z $3 ]; then
make $DEFCONFIG ARCH=arm || exit 3;
nice -n 10 make modules -j4 ARCH=arm || exit 4;
nice -n 10 make -j4 ARCH=arm || exit 5;
else
echo "Bypassing kernel make."
fi
find -name '*.ko' -exec cp -av {} ../$RDIR/lib/modules/ \;
chmod 644 ../$RDIR/lib/modules/* ;
cd ..;
cd ./$RDIR
pwd;
find . | cpio -o -H newc | gzip -9 > ../$RDIR.cpio.gz
cd ..
./mkbootimg --kernel $KDIR/arch/arm/boot/zImage --ramdisk $RDIR.cpio.gz -o boot.img && echo "Made boot image."
tar cf ./Finished/Kernel-$2-$DEV.tar boot.img
echo "Made Kernel-$2-$DEV.tar"
exit 0;
Code:
parentDir/makeKernel XXDEV whateverVersionNumber
Now stop pestering me, I'm not a helpdesk. All of the above is easily found if you search for it.
I've managed to fix both sdcard(EXFAT) and WiFi

[SCRIPT] MySwap v1.0 (SD and NAND) 13/11/2013

THIS IS A SCRIPT TO HAVE SWAP AND NOT A ROM!
I tested the swap on "CM10.x" by volk204 but there isn't a reason it shouldn't work on other rom versions.
version 1.0 13/11/2013 18:29 GMT+2
I experienced some lag with my wave due to its low ram memory. So after testing a few things i found myself more comfortable with setting up swapfile on sd card(NAND memory); after few minutes this terminal becomes really smooth. (It strangely is faster than setting it up on the phone memory, atleast for me)
The idea is mine, but checking around i found that many other script were made. I got the sleep line to boot part idea from "Defiant07 @ XDA" (http://forum.xda-developers.com/showthread.php?t=2359182). Everything else (as simple it is it's all mine)
Swap is the *nix term for virtual memory, that maybe many are familiar with on windows.
You set up a partition/file and use that as virtual memory. It will be much slower than real ram, but it will be much faster than reloading everything from disk everytime.
Code:
#!/system/bin/sh
# This script was authored by Defiant07 @ XDA. If you use/redistribute it, eve$
# Thanks to zeppelinrox most of all, but also many thanks to dk_zero-cool & gu5$
# Much thanks to pikachu01 @ XDA for permission to use the sysctl tweaks from T$
# Read Karl Marx!
# Nearly entirely modified by skyglow
swapfile="/storage/sdcard0/swapfile"
#swapsize in KB
swapsize=524288
swappiness=90
vfs_cache_pressure=100
dirty_background_ratio=5
dirty_ratio=20
dirty_writeback_centisecs=500
dirty_expire_centisecs=200
while [ ! "`ps | grep -m 1 [a]ndroid`" ]; do sleep 10; done
if [ ! -f "$swapfile" ]; then
dd if=/dev/zero of=$swapfile bs=1024 count=$swapsize
mkswap $swapfile
fi
# sleep 30
# mkswap $swapfile
swapon $swapfile
busybox sysctl -e -w vm.swappiness=$swappiness
busybox sysctl -e -w vm.vfs_cache_pressure=$vfs_cache_pressure
busybox sysctl -e -w vm.dirty_background_ratio=$dirty_background_ratio
busybox sysctl -e -w vm.dirty_ratio=$dirty_ratio
busybox sysctl -e -w vm.dirty_writeback_centisecs=$dirty_writeback_centisecs
busybox sysctl -e -w vm.dirty_expire_centisecs=$dirty_expire_centisecs
exit 0
Requirements
Superuser rights on terminal to change permission and copy this file
Configuration
1) set up "swapfile" field to where you want your swap
2) set up "swapsize" field to an appropriate value in KB! ( i think you should try values over 307200 => 300MB to have performance improvements)
(SD or NAND version)
SD version
size=512 MB
position=sdcard root
NAND version
size=300MB
position=bada application partition
How to install
1) Download the right zip from this page
2) Extract the file from the zip
3) Upload the file in some way on the phone
4) Become superuser
5) move it to "/system/etc/init.d"
6) this file should keep hits name "99myswap"
7) change permissions of "99myswap" to 755
8) change its rights to "root:shell"
9) done, next reboot your swap will be set up automatically
P.S.
How to check if swap is activated:
Open terminal
cat /proc/swaps
Swap filename should be displayed with the right size
[ADDED DEBUG SCRIPT]
Possible problems
1) System hangs on cyanogen loading screen ( rotating circle)
INVESTIGATING
2) Battery charge lasts less.
Any kind of virtual memory use more electrical power to perform write/read on disk (SD). This is a side effect of swap.
3) File format
*NIX file format is LF and not CR-LF (for reference why this happens http://en.wikipedia.org/wiki/Newline#Representations)
You can't edit the file with windows notepad, but use something else such as notepad++ and save it in LF coding.
4) System is slower
Possible causes are:
a) you have applications on the same filesystem where you placed the swap
b) your memory (such as SD card) is too slow. Swap will work, it will just go much slower. Try it with a better sd. I tested it with a class 4 and class 10 sdcard and they both speed up. I don't have any possibility at the moment to test a class 2. (reference http://en.wikipedia.org/wiki/Secure_Digital#Speeds)
5) How to change permissions (thanks Eltjo for copy paste from your answer)
Open terminal
Type: su
Type: cd /system/etc/init.d
Type: chmod 0755 99myswap
Type: chown root:shell 99myswap
6) zRam
On my mobile it's faster if i disable zRam from Settings > Performance > Memory Management > zRam .
Anyway i think outcome may change. Try both solutions.
could be possible to use free nand memory as swap instead of sd card?
cfernr said:
could be possible to use free nand memory as swap instead of sd card?
Click to expand...
Click to collapse
I added the NAND version that installs itself in the bada partition. If you installed the sd version remember to remove the swapfile.
darklight2k2 said:
I added the NAND version that installs itself in the bada partition. If you installed the sd version remember to remove the swapfile.
Click to expand...
Click to collapse
lets try both, thank you very much
no problem.
DEBUG REQUEST
Who had the loading screen on cyanogen circle may tell me which sd card class have?
The following procedure do not install the script, it just will work till reboot.
may them try to upload the script in a generic directory such as /storage/sdcard0 and execute it with
su
cd /storage/sdcard0
sh ./99myswap
I'd like the output of that command and the resulting /proc/swaps
then use the phone, (play/call/charge/reboot)
next boot start the script again please and tell me the resulting /proc/swaps again
Thank you for the help
seems work on my phone.
installed swapfile on nand and ram increased 30mb, but low improvement in real performance.
need to change zram options, but cant find this on my phone, maybe due to language discrepancy. can you explain better?
thank you a lot
I also cannot find zram a options under B.U.X V3.1 (4.3.1 CM10.2) by Tigrouzen
If you don't have the menu for zRam it's disabled by default. To see it you should enable all developer settings.
Settings > About phone > Build number (tap 7 times)
Some more tweaks will unlock.
saltcushy said:
I also cannot find zram a options under B.U.X V3.1 (4.3.1 CM10.2) by Tigrouzen
Click to expand...
Click to collapse
Unfortunally i didn't test that rom yet but i think the procedure above will work.
darklight2k2 said:
If you don't have the menu for zRam it's disabled by default. To see it you should enable all developer settings.
Settings > About phone > Build number (tap 7 times)
Some more tweaks will unlock.
Unfortunally i didn't test that rom yet but i think the procedure above will work.
Click to expand...
Click to collapse
tested and I have to say this is necessary if you want to enjoy a few extra mb in this phone.
I recommend nand swap because everybody have 300-400 unused mb in bada apps partition.
disabling zRAM seems also recommendable.
I hope everybody take care of this script for future ROM releases
*** I will decrease swappiness to 70 or 60, I think it is enough.
darklight2k2 said:
no problem.
DEBUG REQUEST
Who had the loading screen on cyanogen circle may tell me which sd card class have?
The following procedure do not install the script, it just will work till reboot.
may them try to upload the script in a generic directory such as /storage/sdcard0 and execute it with
su
cd /storage/sdcard0
sh ./99myswap
I'd like the output of that command and the resulting /proc/swaps
Thank you for the help
Click to expand...
Click to collapse
i've a samsung class 10 32gb.
i've not run the script with sh command, just copied it to /system/etc/init.d (aplied chmod and chown) and reboot the phone. after that it hangs on CM circle on first boot and have to re-install the rom. wipe data/factory reset didn't help.
best regards
JonasVFC said:
i've a samsung class 10 32gb.
i've not run the script with sh command, just copied it to /system/etc/init.d (aplied chmod and chown) and reboot the phone. after that it hangs on CM circle on first boot and have to re-install the rom. wipe data/factory reset didn't help.
best regards
Click to expand...
Click to collapse
To try to solve it i need to know what happens when executed with the sh command
darklight2k2 said:
To try to solve it i need to know what happens when executed with the sh command
Click to expand...
Click to collapse
after installing the rom again it can boot the first time but hangs on the second like everybody else
running with sh it runs ok
JonasVFC said:
after installing the rom again it can boot the first time but hangs on the second like everybody else
running with sh it runs ok
Click to expand...
Click to collapse
that's why i said not install in the problem request
problem is with chown, just run the chmod 755. didn't run chown command last time and it booted second and third time
edit: nevermind, it hanged again
darklight2k2 said:
that's why i said not install in the problem request
Click to expand...
Click to collapse
i did it with 2 different ways....with a fresh install between and both hang
JonasVFC said:
i did it with 2 different ways....with a fresh install between and both hang
Click to expand...
Click to collapse
You're just posting and posting what happens but not what i asked you to do to five me information.
darklight2k2 said:
You're just posting and posting what happens but not what i asked you to do to five me information.
Click to expand...
Click to collapse
i did what you asked, read again, i ran it with sh: it runs fine!! creates the swapfile and outputs some parameters that are in the script like swapiness and others....
JonasVFC said:
i did what you asked, read again, i ran it with sh: it runs fine!! creates the swapfile and outputs some parameters that are in the script like swapiness and others....
Click to expand...
Click to collapse
Hi, @JonasVFC.
I understand you've been running the Swap version of Android v2.1 Volk204. How do you get it?.
Yo, if I install the file in the directory 99myswap indicating the first page, but I get that the system does not start, stays on constantly CM logo.
A greeting.
chapito said:
Hi, @JonasVFC.
I understand you've been running the Swap version of Android v2.1 Volk204. How do you get it?.
Yo, if I install the file in the directory 99myswap indicating the first page, but I get that the system does not start, stays on constantly CM logo.
A greeting.
Click to expand...
Click to collapse
May you guys try the following attached file please?
when it hangs may you post the logfile created in the phone directory ( you can get it from bada)

[Xperia P/U/Sola/Go] Better Internet Wi-Fi and 3G

Hello all! This is my first thread and here I'm presenting you better Internet weather you're on Wi-Fi or 3G.
Requirements:
1. Any ICS/JB ROM except CM.
2. Root.
The method is as follows:
1. Open Root Explorer.
2. Make your way to root>system>build.prop.
3. Tap and hold build.prop and tap "Open in Text Editor".
4. Add these lines to end of your build.prop:
Code:
#Better internet browsing & download speed
net.tcp.buffersize.default=4096,87380,256960,4096,16384,256960
net.tcp.buffersize.wifi=4096,87380,256960,4096,16384,256960
net.tcp.buffersize.umts=4096,87380,256960,4096,16384,256960
net.tcp.buffersize.gprs=4096,87380,256960,4096,16384,256960
net.tcp.buffersize.edge=4096,87380,256960,4096,16384,256960
net.tcp.buffersize.hspa=4096,87380,256960,4096,16384,256960
#3G Tweaks
ro.ril.hsxpa=2
ro.ril.gprsclass=10
ro.ril.hep=1
ro.ril.enable.dtm=1
ro.ril.hsdpa.category=10
ro.ril.enable.a53=1
ro.ril.enable.3g.prefix=1
ro.ril.hsupa.category=5
5. Press menu button and tap "Save and Exit".
6. Exit Root Explorer.
7. Re-boot phone.
8. Enjoy!
REMEMBER to hit THANKS better than saying!
cy56 said:
Hello all! This is my first thread and here I'm presenting you better Internet weather you're on Wi-Fi or 3G.
****ONLY FOR STOCK ICS***
This Mod is only for Stock ICS because this Mod is already present in Custom ROMs.
Requirements:
1. Stock ICS.
2. Root.
3. Unlocked Bootloader.
Click to expand...
Click to collapse
I'm sorry bro, why do we need unlocked bootloader for this?
Because I've tried this on locked bootloader and I've to flash my Stock FTF again I hadn't tried anymore due to my exams. Try if u can had this on locked bootloader.
And, sorry for late reply (if I did).
Sent from my ST25i using XDA Premium 4 mobile app
Why wouldn't it work on stock JB?
Sent from a polarized, modified, undying, amazingly talented and extremely naughty phone.
That's Work on locked Bootloader it's Works Good
Also try it on Xperia Sola Works Too
Thanks
:laugh:
Vtrendzzy said:
Why wouldn't it work on stock JB?
Sent from a polarized, modified, undying, amazingly talented and extremely naughty phone.
Click to expand...
Click to collapse
It works on JB too! I said for ICS because all JB custom ROMs already have this.
If your ROM doesn't have this, you can try this.... By the way I should change it to both ICS & JB.....
Sent from my ST25i using XDA-Developers Premium App.
REMEMBER to hit THANKS if I helped you, it's better than saying and doesn't costs nothing!
Work on kk?
Sent from my Xperia P using XDA Premium 4 mobile app
@cy56
Wouldn't it be much more simple to make a flashable zip that would reduce the how to install instructions to about 2 lines only?
Could some one make a zip of it to install with cwm?
That would help a lot lf people
Not CWM Flashable!
Potloodje said:
Could some one make a zip of it to install with cwm?
That would help a lot lf people
Click to expand...
Click to collapse
Hey! This is not CWM Flashable because if you make flashable ZIP and flash it, it'll replace your whole build.prop file and you'll get bootloop.
And, By the way, this method is so easy that anyone can do it. As I've provided whole process in step-by-step, you can do it on closed eyes! :victory: (PS: Don't try doing this closing your eyes :laugh: :laugh: )
Work on KK?
Sent from my Xperia Sola using Tapatalk
cy56 said:
Hey! This is not CWM Flashable because if you make flashable ZIP and flash it, it'll replace your whole build.prop file and you'll get bootloop.
Click to expand...
Click to collapse
Making a flashable zip that would not replace the whole build.prop is so easy that anyone can do it.
e.g. by executing this simple shell script:
Code:
#!/system/bin/sh
echo "\
line one\n\
line2\n\
lineN" >> /system/build.prop
Is that easy or what?
A bit too easy maybe as it would keep adding the lines at the bottom of build.prop every time it is executed, so something a bit more complicated is needed, like this
Code:
#!/system/bin/sh
BUSYBOX="/sbin/busybox"
SED="$BUSYBOX sed"
WC="$BUSYBOX wc"
#
COMMENT1="# YOUR COMMENT START"
COMMENT2="# YOUR COMMENT END"
MYLINES="\
$COMMENT1\n\
line1\n\
line2\n\
lineN\n\
$COMMENT2"
#
EXPECTEDLINES=`echo "$MYLINES" | $SED 's/'"$MYLINES"'/'"$MYLINES"'/' | $WC -l`
if [ "$EXPECTEDLINES" == "" ]; then exit 1 fi;
FOUNDLINES=`$SED -e '/'"$COMMENT1"'/,/'"$COMMENT2"'/!d' build.prop | $WC -l`
if [ "$FOUNDLINES" == "0" ]; then
echo "$MYLINES" >> build.prop
exit 0;
fi
exit 2;
And if you don't want to rely on CWM having busybox, add busybox to the zip and change
BUSYBOX="/sbin/busybox"
to
BUSYBOX=`dirname $0`"/busybox"
or just
BUSYBOX=`/tmp/busybox"
See? Anyone can do it
ChikeD said:
Making a flashable zip that would not replace the whole build.prop is so easy that anyone can do it.
e.g. by executing this simple shell script:
Code:
#!/system/bin/sh
echo "\
line one\n\
line2\n\
lineN" >> /system/build.prop
Is that easy or what?
A bit too easy maybe as it would keep adding the lines at the bottom of build.prop every time it is executed, so something a bit more complicated is needed, like this
Code:
#!/system/bin/sh
BUSYBOX="/sbin/busybox"
SED="$BUSYBOX sed"
WC="$BUSYBOX wc"
#
COMMENT1="# YOUR COMMENT START"
COMMENT2="# YOUR COMMENT END"
MYLINES="\
$COMMENT1\n\
line1\n\
line2\n\
lineN\n\
$COMMENT2"
#
EXPECTEDLINES=`echo "$MYLINES" | $SED 's/'"$MYLINES"'/'"$MYLINES"'/' | $WC -l`
if [ "$EXPECTEDLINES" == "" ]; then exit 1 fi;
FOUNDLINES=`$SED -e '/'"$COMMENT1"'/,/'"$COMMENT2"'/!d' build.prop | $WC -l`
if [ "$FOUNDLINES" == "0" ]; then
echo "$MYLINES" >> build.prop
exit 0;
fi
exit 2;
And if you don't want to rely on CWM having busybox, add busybox to the zip and change
BUSYBOX="/sbin/busybox"
to
BUSYBOX=`dirname $0`"/busybox"
or just
BUSYBOX=`/tmp/busybox"
See? Anyone can do it
Click to expand...
Click to collapse
Ohh man you really know a lot of programming. Can u teach me from basics? Pls
Sent from my ST27i using XDA Premium 4 mobile app
Or you can simply create a build entry
Hukanawa said:
Or you can simply create a build entry
Click to expand...
Click to collapse
Whazet?
@cy56
The net.tcp.buffersize props make absolutely no change at all as the are set by init.
The ro.ril props are not present at stock at all so at best they do no harm.
Never works for me....
ChikeD said:
Making a flashable zip that would not replace the whole build.prop is so easy that anyone can do it.
e.g. by executing this simple shell script:
Code:
#!/system/bin/sh
echo "\
line one\n\
line2\n\
lineN" >> /system/build.prop
Is that easy or what?
A bit too easy maybe as it would keep adding the lines at the bottom of build.prop every time it is executed, so something a bit more complicated is needed, like this
Code:
#!/system/bin/sh
BUSYBOX="/sbin/busybox"
SED="$BUSYBOX sed"
WC="$BUSYBOX wc"
#
COMMENT1="# YOUR COMMENT START"
COMMENT2="# YOUR COMMENT END"
MYLINES="\
$COMMENT1\n\
line1\n\
line2\n\
lineN\n\
$COMMENT2"
#
EXPECTEDLINES=`echo "$MYLINES" | $SED 's/'"$MYLINES"'/'"$MYLINES"'/' | $WC -l`
if [ "$EXPECTEDLINES" == "" ]; then exit 1 fi;
FOUNDLINES=`$SED -e '/'"$COMMENT1"'/,/'"$COMMENT2"'/!d' build.prop | $WC -l`
if [ "$FOUNDLINES" == "0" ]; then
echo "$MYLINES" >> build.prop
exit 0;
fi
exit 2;
And if you don't want to rely on CWM having busybox, add busybox to the zip and change
BUSYBOX="/sbin/busybox"
to
BUSYBOX=`dirname $0`"/busybox"
or just
BUSYBOX=`/tmp/busybox"
See? Anyone can do it
Click to expand...
Click to collapse
I tried it many times but it never works for me. But I tried a different method which doesn't required programming and that method never works for me thereby giving me "Infinite Bootloop"!
If someone wants to have flashable ZIP please contact him!​
Works for me!
ChikeD said:
Whazet?
@cy56
The net.tcp.buffersize props make absolutely no change at all as the are set by init.
The ro.ril props are not present at stock at all so at best they do no harm.
Click to expand...
Click to collapse
I don't know programming hence I don't know what each and every content does. I found this in many ROMs and they gave me better internet stability as in Stock ROM my downloads are usually halted so I shared this for those users who don't have this in their ROMs. I don't know the original creator of this so I can't thank him.
Try it!
jjssore said:
Work on KK?
Sent from my Xperia Sola using Tapatalk
Click to expand...
Click to collapse
KK Nightly's latest build already have some 3G and Wi-Fi tweaks different from this. If you don't have you can have a try!
But before trying make a backup of your current ROM from CWM.
cy56 said:
I don't know programming hence I don't know what each and every content does. I found this in many ROMs and they gave me better internet stability as in Stock ROM my downloads are usually halted so I shared this for those users who don't have this in their ROMs. I don't know the original creator of this so I can't thank him.
Click to expand...
Click to collapse
So how do you know it works, what difference does it make?
I think it is better not to post things you don't know about, unless it's a share/link to app or MOD someone did.
Maybe there are RMs it works, but ROMs have many other changes that may make it work.
cy56 said:
KK Nightly's latest build already have some 3G and Wi-Fi tweaks different from this. If you don't have you can have a try!
But before trying make a backup of your current ROM from CWM.
Click to expand...
Click to collapse
where i can find link kk nightly ? and any bugs?

[Linux] Porting native Linux to Galaxy Note9

This thread is about starting native Linux on Samsung Galaxy Note9. This isn't my first attempt to do such thing. The history looks like Galaxy Spica -> Galaxy J1 (2016) -> Galaxy Note9. So I know what I'm doing
Later I'll post instructions how to install and run it.
Note9 isn't my main device, so I won't work on dualboot. If some wants to make it, feel free to build dualboot (kexec) recovery and post it here.
Source code.
Kernel: https://github.com/LONELY-WOLF/crownlte-linux-os
First success
So, here is a first result.
With minor modifications to DECON (framebuffer) my Note9 is able to run Arch Linux form SD card.
So far it has no serial or USB console. I can't find a way to make UART JIG for Type-C Samsungs. USB gadgets are hardcoded and can't be easy changed to CDC ACM. This is not good and makes development harder.
Arch Linux says it started GUI but I don't know what happened to Xorg. It can be on back buffer or on another display (since Note9 has it via Type-C).
This would be awesome for me during pen testing?!
Def following!
Could install it on dualboot?
giorgior.r said:
Could install it on dualboot?
Click to expand...
Click to collapse
Yes, it's possible. As for now kernel is inside phone memory and root FS is on SD card.
There are two ways to install it alongside Android:
Flash Linux kernel as recovery. So when you try to enter recovery it'll boot into Linux. You lose recovery in this case.
Install special dualboot/kexec recovery and start Linux from recovery menu. (If someone will make such recovery for Note9)
All Linux files (except kernel) are on SD card. SD has following partition scheme:
Storage. That's what your Android sees as SD card. FAT32 or exFAT
Apps2SD. Is someone still using it? However this partition can be 1MB in size.
Linux rootfs. That's where Linux "ROM" lives.
So SD is also ready for daily use.
nice, have similar thing based on exynos-linux-stable and debian stretch wifi work but sound and usb not yet for me. how you enabled boot console? also need to swap red and blue channel because they are flipped on 24/32 bit colours
Sisah said:
nice, have similar thing based on exynos-linux-stable and debian stretch wifi work but sound and usb not yet for me. how you enabled boot console? also need to swap red and blue channel because they are flipped on 24/32 bit colours
Click to expand...
Click to collapse
For fbcon you need to patch decon driver. Take a look at my commits on GitHub.
Yes, RGB<->BGR is a common issue. I have it on J120F too. This hack work for J1. But it would be nice to find a source of the problem. I believe decon reports wrong color order.
WARNING! I had to disable fbcon on J1 because it messed up with Xorg.
Still no luck with USB. I try to configure it with configfs, but got error
Code:
Config c/1 of g1 needs at least one function
Looks like Samsung hardcoded something inside USB drivers.
Found out that USB configfs is heavily modified. That's the reason why Linux can't configure USB gadgets properly. Bring back compatibility seems to be a hard task.
ho ho ho... so long time im not play dualboot
sorry i have diferent question, i see on youtube, normal windows 10 work on lumia 950 and 950xl, what its that ?
Ce Doresti said:
ho ho ho... so long time im not play dualboot
sorry i have diferent question, i see on youtube, normal windows 10 work on lumia 950 and 950xl, what its that ?
Click to expand...
Click to collapse
Since I'm a Windows Phone hacker, I can answer your question
That project is very similar to what I do here. Starting from Windows Phone 8, phone OS and desktop one have one (NT) kernel. Just like Android and desktop Linux do. Windows you see on NL950 on YouTube is "Windows for ARM". It looks like desktop but it can't run normal Windows EXEs because of different processor architecture. Maybe it can run desktop .NET applications (I've made proof-of-concept EXE that worked on both Windows Mobile 5.0 and Windows XP) but I'm not sure.
Linux is a better way to get desktop OS on mobile device. Open source nature of most Linux software makes it possible to use almost any program on any processor architecture. Take a look at single board computers (like Raspberry Pi) if you want to see what Linux can do on ARM architecture.
I think win 10 for arm have integrated x86 emulator, so it probably launch nearly anything.
If i can have one more question. How you refreshing screen? Refresh rate is set to 0 and my every attempt to configure screen with fbset result in black screen and hard reset, so i must use infinite loop that send "1" to /sys/class/graphics/fb0/rotate to refresh my screen
-W_O_L_F- said:
Since I'm a Windows Phone hacker, I can answer your question
That project is very similar to what I do here. Starting from Windows Phone 8, phone OS and desktop one have one (NT) kernel. Just like Android and desktop Linux do. Windows you see on NL950 on YouTube is "Windows for ARM". It looks like desktop but it can't run normal Windows EXEs because of different processor architecture. Maybe it can run desktop .NET applications (I've made proof-of-concept EXE that worked on both Windows Mobile 5.0 and Windows XP) but I'm not sure.
Linux is a better way to get desktop OS on mobile device. Open source nature of most Linux software makes it possible to use almost any program on any processor architecture. Take a look at single board computers (like Raspberry Pi) if you want to see what Linux can do on ARM architecture.
Click to expand...
Click to collapse
thank you !
I can see the potential of this project if things go according to your vision.. I will for sure donate you for your amazing effort
Interesting, is it more for the challenge itself or what's your goal?
Linux on Dex works great for me, it's missing a gui if you don't connect it to a display but you could probably trick it to believe that the phone screen is an external display.
Sisah said:
I think win 10 for arm have integrated x86 emulator, so it probably launch nearly anything.
If i can have one more question. How you refreshing screen? Refresh rate is set to 0 and my every attempt to configure screen with fbset result in black screen and hard reset, so i must use infinite loop that send "1" to /sys/class/graphics/fb0/rotate to refresh my screen
Click to expand...
Click to collapse
Since we use the same kernel can you share your work on GitHub too? Also I need all your current work on OS. What image you use? What modifications you made? It's a good idea for me to migrate to the same distro. This can speed up our work.
-W_O_L_F- said:
Since we use the same kernel can you share your work on GitHub too? Also I need all your current work on OS. What image you use? What modifications you made? It's a good idea for me to migrate to the same distro. This can speed up our work.
Click to expand...
Click to collapse
Here is my config files for debian.
https://www.mediafire.com/file/ccziy42yj2bn28x/LINUX.zip
(Include precompiled mtev driver from meefik https://github.com/meefik/xorg-input-mtev
Also it set wacom driver for spen to work
)
kernel .config
https://www.mediafire.com/file/czrct62638xpkhz/.config
And debian install cdrom
https://cdimage.debian.org/debian-cd/current/arm64/iso-cd/
installation was little tricky, need to install linuxdeploy compile kernel with atleast isofs, systemv-ipc, vt console, kernel automounter-v4, fanotify and raid-dm support and put it to recovery.img, then dd it to BOOT partition.
Now download debian-installer.iso, extract ramdisk.gz from him and reboot to modified recovery.
Here mount system, go to terminal, type linuxdeploy shell.
Now we must unpack ramdisk.gz from installer with abootimg or mkbootimg, mount debian-installer.iso to unpacked-ramdisk/cdrom and then we can chroot to installer ramdisk with chroot /unpacked-ramdisk /bin/ash
After that just type
./init
debian-installer-startup
debian-installer
Use sdcard as root partition and install.
After installing base system it probably fail to setup apt, so we must open terminal in setup program then
mount --bind /cdrom /target/media/cdrom (need to create that dir first)
then
chroot /target /bin/bash
apt-cdrom add
apt-get update
Now you can run tasksel and install desktop (kde xfce and gnome work but need lightdm for virtual keyboard on login)
(Here is nice place to copy those config files i posted and run install.sh, but also be sure to install lightdm and onboard keyboard, its not in my pack)
after that type exit few times until you get back to installer where you can finish installation.
Then need to compile kernel make initrd and create boot.img (can be done in linuxdeploy on android)
Also copy /vendor from phone to installed system then wifi start working and we can install from netinst-cd with little less trouble, or install to .img maybe even folder from internal_sdcard, its much faster than booting from memory card
Here is my fresh install of debian stretch and kde, only modification is in lightdm-gtk-greeter.conf, 40-libinput.conf, xorg.conf (not needed much), /usr/share/initramfs-tools/scripts/local (hardcoded root partition and loop .img for boot) and added framebuffer_refresh systemd service. To install just unpack .zip to root of /data (sda25) and flash linux-boot.img to boot partition.
Sound, USB, and 24bit colors are still broken, but maybe still better than linux on dex with some hardware graphics acceleration like panfrost driver it may be better than my pc
Root - 16GB .img after unpack
https://mega.nz/#!zeAA3KzY!vK5g2HtI0H3CD654wx40w14VstT6ktLX6tzNsUMWNoU
Boot.img
https://mega.nz/#!LCQB0QJK!YKTflwPsAJosaxr0Bqlu_9XtfgCFxkgNCmrbyNNaBvM
Login as sisah with password 123456, root password 123456, kde wallet password is set to 123456 too. Made on n960f dual sim.
Sisah said:
Here is my fresh install of debian stretch and kde, only modification is in lightdm-gtk-greeter.conf, 40-libinput.conf, xorg.conf (not needed much), /usr/share/initramfs-tools/scripts/local (hardcoded root partition and loop .img for boot) and added framebuffer_refresh systemd service. To install just unpack .zip to root of /data (sda25) and flash linux-boot.img to boot partition.
Sound, USB, and 24bit colors are still broken, but maybe still better than linux on dex with some hardware graphics acceleration like panfrost driver it may be better than my pc
Root - 16GB .img after unpack
https://mega.nz/#!zeAA3KzY!vK5g2HtI0H3CD654wx40w14VstT6ktLX6tzNsUMWNoU
Boot.img
https://mega.nz/#!LCQB0QJK!YKTflwPsAJosaxr0Bqlu_9XtfgCFxkgNCmrbyNNaBvM
Login as sisah with password 123456, root password 123456, kde wallet password is set to 123456 too. Made on n960f dual sim.
Click to expand...
Click to collapse
Good work
@Sisah
I've managed to get USB to work. Here, take the code:
Code:
#!/bin/bash
mkdir -p /sys/kernel/config/usb_gadget/g1
cd /sys/kernel/config/usb_gadget/g1
echo 0xabcd > idVendor
echo 0x1234 > idProduct
mkdir -p strings/0x409
echo SM-960F > strings/0x409/serialnumber
echo Samsung > strings/0x409/manufacturer
echo Note9 > strings/0x409/product
# Config 1
mkdir -p configs/c.1
echo 120 > configs/c.1/MaxPower
mkdir -p configs/c.1/strings/0x409
echo "ACM" > configs/c.1/strings/0x409/configuration
mkdir functions/acm.GS0
ln -s functions/acm.GS0 configs/c.1
# Config 2
#mkdir -p configs/c.2
#echo 120 > configs/c.2/MaxPower
#mkdir -p configs/c.2/strings/0x409
#echo "RNDIS" > configs/c.2/strings/0x409/configuration
mkdir functions/rndis.usb0 # use default parameters
ln -s functions/rndis.usb0 configs/c.1
echo "acm,rndis" > /sys/class/android_usb/android0/functions
echo 10c00000.dwc3 > UDC
echo 1 > /sys/class/android_usb/android0/enable
# to unbind it: echo "" UDC; sleep 1; rm -rf /sys/kernel/config/usb_gadget/g1
/sbin/agetty -w -L 115200 ttyGS0 linux
exit 0
-W_O_L_F- said:
@Sisah
I've managed to get USB to work. Here, take the code:
Code:
#!/bin/bash
mkdir -p /sys/kernel/config/usb_gadget/g1
cd /sys/kernel/config/usb_gadget/g1
echo 0xabcd > idVendor
echo 0x1234 > idProduct
mkdir -p strings/0x409
echo SM-960F > strings/0x409/serialnumber
echo Samsung > strings/0x409/manufacturer
echo Note9 > strings/0x409/product
# Config 1
mkdir -p configs/c.1
echo 120 > configs/c.1/MaxPower
mkdir -p configs/c.1/strings/0x409
echo "ACM" > configs/c.1/strings/0x409/configuration
mkdir functions/acm.GS0
ln -s functions/acm.GS0 configs/c.1
# Config 2
#mkdir -p configs/c.2
#echo 120 > configs/c.2/MaxPower
#mkdir -p configs/c.2/strings/0x409
#echo "RNDIS" > configs/c.2/strings/0x409/configuration
mkdir functions/rndis.usb0 # use default parameters
ln -s functions/rndis.usb0 configs/c.1
echo "acm,rndis" > /sys/class/android_usb/android0/functions
echo 10c00000.dwc3 > UDC
echo 1 > /sys/class/android_usb/android0/enable
# to unbind it: echo "" UDC; sleep 1; rm -rf /sys/kernel/config/usb_gadget/g1
/sbin/agetty -w -L 115200 ttyGS0 linux
exit 0
Click to expand...
Click to collapse
Nice it enable usb, but still getting errors when i plug otg, and phone reboot if i connect it to pc, its strenge because i installed linux on more phones and otg alwais worked without any configuration.

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