[Q] Custom rom boots up but shows black screen - Android Q&A, Help & Troubleshooting

Hi,
First of all, sorry for any grammar or spelling mistakes i make. I'm not very good at English.
I was porting CM 11 from LG VS920 (LG Spectrum) to a Sky Vega A820L (LTE EX). They have most same hardwares (SoC, RAM, Camera,...), the only difference is the screen resolution (Spectrum: 1280x720. Sky Vega LTE EX: 1280x800 - kinda weard resolution, huh).
I followed the guides on xda about porting rom from a device to another. Most rom porting guides are pretty similar.
So, after zipping the rom, i flashed it on my Sky A820L. It booted, showed the boot animation. But after the animation, it only showed a black screen, although the capacitive touch buttons still lid up and i can feel vibration when touching on some places on the screen.
What should I do to fix it?

Related

Xperia multi touch

Hello i have a question, why is the touch/multi touch is so slow and not responsive? im running FreeX10 beta 4. i have tested xperia 10 touch/multi touch using phone tester(u can get this app from the market) vs galaxy s and mottorla droid, and the touch/multi touch on droid and galaxy s is way beter than its on xperia... is that because of the device(the touch screen)? or the software?
Stock dual touch is very responsive so I would advise you stick too 2.1 roms until such times as newer android versions are fully stable...
alentor said:
Hello i have a question, why is the touch/multi touch is so slow and not responsive? im running FreeX10 beta 4. i have tested xperia 10 touch/multi touch using phone tester(u can get this app from the market) vs galaxy s and mottorla droid, and the touch/multi touch on droid and galaxy s is way beter than its on xperia... is that because of the device(the touch screen)? or the software?
Click to expand...
Click to collapse
It's the hardware. Those two phones have superior digitizers (yeah, even the old motorola droid, i think they developed their's in house?) whereas the nexus one and x10 user a digitizer that's not as advanced (only dual touch).
there are some ways to make it a little better (editing the build.prop to maxevents - i think - 26).
And to fend off any future questions that I know will be asked.
Changing the digitizer won't help unless: bootloader gets cracked, developer writes a new driver for a new digitizer, a manufacturer creates a new digitizer to fit the old x10... at that point, it's time for a new phone
edit: i apologize in advance if some of my terminology is off or if i'm slightly wrong with any of my info, but I think this is the jist of it.
owww.. what a disappointment.. didnt expect sony to fail with its touch screen that hard... >_>
After I updated to the latest baseband .55,and re rooted and installed cm 6.1.3,the multi touch has worked flawlessly with no lag.Try it out
really? do u know if i can run FREEX10 with .55 baseband?
EDIT: installed .55 working fine with FREEX10 beta 4.. but the touch/multi touch is still the same.. nothing changed, still slow and unresponsive..

LG Optimus L7 II (Optimus L7 2) P710

Does anyone else wait for the new Optimus L7 II (P710)?
http://www.techradar.com/reviews/phones/mobile-phones/lg-optimus-l7-2-1133186/review
Dual-core Qualcomm MSM8225 Snapdragon 1GHz, Adreno 203, 4.3 inches display, 8 MP camera, 2460 mAh battery.
http://www.gsmarena.com/lg_optimus_l7_ii-5275.php
Especially the battery impresses me. Samsung Galaxy S2 got an improved optional power battery 2000mAh
Hopefully the P710 will get Cyanogenmod, because it seems to have standard Qualcomm hardware. And hopefully the price will be similar to the very cheap P700...
http://www.idealo.de/preisvergleich/OffersOfProduct/3185856_-optimus-l7-lg-electronics.html
$205 sim-lock-free, off-contract.
AW: LG Optimus L7 II (Optimus L7 2) P710
Yes, I'm waiting for it. It should replace my old LG Optimus One p500.
The size (4.3") is not to big, the battery sounds good, it has NFC and Sd-Card and Jelly Bean. Does anyone knows the release date in Germany?
Gesendet von meinem Nexus 7 mit Tapatalk 2
i have got that phone last week... descent battery in standby mode.... but major problem is 4 touch buttons doesnt have backlight....
zeu55 said:
i have got that phone last week... descent battery in standby mode.... but major problem is 4 touch buttons doesnt have backlight....
Click to expand...
Click to collapse
I was very interested in getting this phone, but now... im dissapointed.. f***n lg why they must **** up every phone they made... My friend have p880 HD 4x and phone doesnt have LED notifications... unforgivable for almost top LG phone
zeu55 said:
i have got that phone last week... descent battery in standby mode.... but major problem is 4 touch buttons doesnt have backlight....
Click to expand...
Click to collapse
I asked on the german amazon website and got an answer.
You can turn the backlight on and off in the settings.
http://www.amazon.de/review/R3OEC1D...d=Tx1027Q7LJO1FGL&store=ce-de#Mx27URUB5LDID25
Another question: Is rooting possible yet.
Gesendet von meinem Nexus 7 mit Tapatalk 2
Guys, have you tried optimus l7 II DUAL ? ( p715 )
when you talk on one sim, will another one go out of reach for who call to it ? or both sims are always active ... ?!!!
glimmling said:
I asked on the german amazon website and got an answer.
You can turn the backlight on and off in the settings.
http://www.amazon.de/review/R3OEC1D...d=Tx1027Q7LJO1FGL&store=ce-de#Mx27URUB5LDID25
Another question: Is rooting possible yet.
Gesendet von meinem Nexus 7 mit Tapatalk 2
Click to expand...
Click to collapse
well in the settings there is nothing to make touch key backlight on. if u can show the procedure will be grateful
zeu55 said:
well in the settings there is nothing to make touch key backlight on. if u can show the procedure will be grateful
Click to expand...
Click to collapse
I don't own the phone yet, but you see the backlight at 1:32 in this unboxing video:
The video is from the same person, who told me in the amazon-comments, that it's possible.
You could ask him in the Youtube-comments. He wrote, that he is open to questions and ideas.
glimmling said:
I don't own the phone yet, but you see the backlight at 1:32 in this unboxing video:
The video is from the same person, who told me in the amazon-comments, that it's possible.
You could ask him in the Youtube-comments. He wrote, that he is open to questions and ideas.
Click to expand...
Click to collapse
You're goddamn right
Sent from my LG-P700 using Tapatalk 2
well thats because its l7 p710 . not the l7 p715 dual.. both are slightly different models my friend.
The first poster is talking about the p710. My reply too.
Om thinking about selling my P700 when the LG Optimus 7 II comes out for my country ( netherlands ), but i will atleast wait until root acces is posible
Sent from my LG-P700 running on CM10.
glimmling said:
The first poster is talking about the p710. My reply too.
Click to expand...
Click to collapse
both are basically same model with p715 having dual sim. else configuration is same.
I know it's still fresh phone, but are there any news about rooting, unlocking and android development for P710? I couldn't find no information about it yet. Hopefully it will not prove to be dead end. Solid hardware and large battery should provide nice starting point for a great phone.
BoxedIn said:
I know it's still fresh phone, but are there any news about rooting, unlocking and android development for P710? I couldn't find no information about it yet. Hopefully it will not prove to be dead end. Solid hardware and large battery should provide nice starting point for a great phone.
Click to expand...
Click to collapse
I found this in a russian forum:
http://translate.googleusercontent.com/translate_c?depth=1&hl=de&rurl=translate.google.com&sl=ru&tl=en&u=http://4pda.ru/forum/index.php%3Fshowtopic%3D449418%26st%3D340&usg=ALkJrhhA3Y4nCn-VHJSkwtrTc3atIuilnA#entry21733927
The rooted kdz-file is for the p713 and I don't know, what is the difference to the p710 (languages, basebands?).
I got this phone last week, but there are some issues, and I'm not alone with them.
Overheating: the display-brightness goes automatically to 61% after some minutes of usage outside in the sun
it often losts the mobile reception, when the usb is plugged in for charging
it losts my legally paid Play Store apps after a reboot (wrong mounting?). this is only for a few users, for me too
So there is some effort, excellent. Thanks for finding this.
As for the problems stated it seems like some software issue to me, even if it is hardware related it is too big of a problem not to be rectified by manufacturer.
L7 P710
BoxedIn said:
So there is some effort, excellent. Thanks for finding this.
As for the problems stated it seems like some software issue to me, even if it is hardware related it is too big of a problem not to be rectified by manufacturer.
Click to expand...
Click to collapse
I got my phone 4 days ago, same day came out update to 10D (europe region hungary) so I was on original 10A just few minutes , none of the issues exists. I have only small problem,
back cover is not good as it was on L7 P700, or on the P715 (the dual sim version) the back is slick so it will probobly collect some scratches soon, but the everything else is much better, screen is more responsive than on 4X, camera is excelent, gps lock is faster, battery backup is better than P700 on ICS , quick translator is nice addon.
Regards,
Pepe
properties: http://www.gsmarena.com/lg_optimus_l7_ii_p710-5275.php
Actual Android for this phone is only JB 4.1.2.
ROOT by Framaroot 1.4.1: http://forum.xda-developers.com/attachment.php?attachmentid=1952450&d=1368232060
KDZ file: http://lg-phone-firmware.com/index.php?id_mod=21
FLASH Any LG Factory ROM (kdz): http://forum.xda-developers.com/showpost.php?p=36351786
Service manual (english): http://ulozto.cz/xmshmZKw/lg-p710-svc-eng-130313-rar
Hidden menu - in dialer input: 3845#*710#
Factory hardware reset = button power + volume down + button home.
emergecy mode - remove the battery, push button: volume down + Power + Insert USB cable
Recovery mode - hold volume up + home button + power button, after a while (to see the logo that disappears and flashes the Back button and menu), release Power button and continue to hold the volume up and home button
Can anyone provide?: ClockworkMod (CWM), CyanogenMod (CM10.1 or later) or other ROMs, unlock bootloader, or something useful for this phone???
Great post, it should be sticky.....
I have bought this phone yesterday, and all i can say it is amazing! Speed, display quality, angle of view, camera...
Pictures are great at full dark, flash is very powerfull, colors are so freaking natural.
UI Speed amazing! I couldnt belive it. Jelly Bean and the Butter Project are realy doing their purpose. I have put on Nova Launcher, and it is so smooth. Other, settings scrolling, Phonebook scroling, etc, etc, is also very smooth.
This phone also has Face unlock, smart screen lock ( Like Galaxy S III, it locks itself when you are not watching it), NFC, Android Beam and so on...The only thing it doesnt have is HDMI. But, i dont realy need that, because i have VGA connection monitor But it would be great to watch pictures on HDMI at 1920 x 1080 LED Screen
I was deciding between L7 II and Alcatel OneTouch Idol (I dont know which Idol, there are milion versions, LOL, but it is dual core with 1GB of RAM). And when i was testing them, Alcatels camera is worse than LG's, even though Alcatel supposingly has HDR :/
Further more, Alcatel has 4.7 inch display that is about 11.9 cm compared to LG's 4.3 inch (10.9 cm), and it has bigger resolution (because of the bigger screen DUH), but in fact, Alcatel's display looks a little like your old T-Shirt that was being washed 75 times Colors are not so natural like on LG, even though both have IPS LCD screen. But, dont get me wrong, that Alcatel is an amazing phone for the price of 2500RSD (about 23 euros) a month in VIP Mobile network. The main thing that pushed me away from Alcatel is 1800mAh battery that supplies 4.7 inch screen :/
That's a little low, you will agree with me...But further more, it cant be removed from the phone! i.e. user cant replace the battery if it dies...And maybe that could not be a problem, if Alcatel had a good SUPPORT! But, they dont have it, i had an alcatel OT before...So, if my battery dies, i cant replace it, i have no mobile phone store that can replace the battery instead of me. In either way, it is impossible to change it. It is not like on Iphone, there you have Apple store and, services on any corner and you can do what ever the F*** you want...
So the sum is, people that are thinking to buy this phone, dont think furthermore, go to the store and buy it!

Video quality improvement with custom ROM

Hi,
I have using Prime for more than a year now with stock ROM (rooted). The colors especially white looks faded/washed out. Will there be any change in the color/display with custom ROM? or is this dependent on the screen? I am planning to install a custom ROM
does the colour look fade out in other apps?
for most things i would want to say no, cause that would mean your display is dying out... but the asus tab is a bit weird....
i find it when the battery is low it starts fading out like you said
so you might have some like if you install a new rom on it

[Q] Gsmar Roma R2 support?

I am about to change phones this week and I have this Gsmart in sights. I would like to know if it would be able to run Themer. According to specs it sports following:
MTK6572 chipset
Mali400 GPU
1GB RAM
4" IPS 800x480 screen at 220-something dpi
I have not held the phone in hand yet but from images online it looks like it has soft keys.
I wanted to try Themer from the start but alas my current phone is way out of the specs for it to run (poor old Samsung Galaxy mini at 3.2' 240x320 screen) so I would rather get a phone that is able to run it...
lockdalf said:
I am about to change phones this week and I have this Gsmart in sights. I would like to know if it would be able to run Themer. According to specs it sports following:
MTK6572 chipset
Mali400 GPU
1GB RAM
4" IPS 800x480 screen at 220-something dpi
I have not held the phone in hand yet but from images online it looks like it has soft keys.
I wanted to try Themer from the start but alas my current phone is way out of the specs for it to run (poor old Samsung Galaxy mini at 3.2' 240x320 screen) so I would rather get a phone that is able to run it...
Click to expand...
Click to collapse
For now the Galaxy S2 is supported, and that has roughly the same specifications, however that doesn't have soft keys. So chances are Themer is not going to work. We are working on supporting more devices soon though. Sorry for the inconvenience.
ThemerSupport said:
For now the Galaxy S2 is supported, and that has roughly the same specifications, however that doesn't have soft keys. So chances are Themer is not going to work. We are working on supporting more devices soon though. Sorry for the inconvenience.
Click to expand...
Click to collapse
Well, according to this image ( http://www.mojandroid.sk/wp-content/uploads/2013/12/Recenzia_GSmart_Roma_R2_12.jpg) and unboxing videos on youtube, the keys are visible even if the phone is turned off. similar to Samsung's HW home button. So it seem that Gsmart has no HW button but has instead touch keys. But are those considered soft keys? As I understand it, soft keys are actually part of the devices screen? Am I right?
If so that it would mean the the phone has 'native" resolution of 480 x 800 without those additional 54 pixels of height reserved for keys and I should be able to run themer... Please say my understanding is correct... :fingers-crossed:
_____________
Edit:
Never mind, I just found the explanation for soft keys on the support site. These are definitely not what is considered soft keys... So I am looking forward to trying themer on my new phone next week... :good:
Thread can be considered solved and it can be closed...
I have just returned with the new phone and guess what was the first app I needed to try... Yes, Themer and it is running so far without a problem so I will keep on playing around and see if I find any issues.
So at least some good news for guys with phones with similar specs..:good:
lockdalf said:
I have just returned with the new phone and guess what was the first app I needed to try... Yes, Themer and it is running so far without a problem so I will keep on playing around and see if I find any issues.
So at least some good news for guys with phones with similar specs..:good:
Click to expand...
Click to collapse
That's great to hear! Thanks lockdalf!

[Q] Fonts in KatKiss v30

Hi,
First I would like to thank the developpers of this ROM as it really gave my tf201 a new life. Working really great so far. My only problem would be the font rendering, all fonts look really blurry. I have used iFonts to change the default font and it is now a lot better but still fonts are not crystal clear. I have searched the forum for quite some time but haven't found anything on the matter. Has someone experienced the problem as well ? Is there a workaround ?
Thank you
It's not possible to make it crystal clear because prime's resolution is 1280*800 on 10.1 inch screen.
Nowadays phones have 1920*1080 on 5 inch screens and it's equal to 441 ppi pixel density. Asus prime's pixel density is only 149.
I was under the impression that fonts were not that bad with stock ROM (but I only just got the tablet and almost directly put KatKiss on it, so I might be mistaken). Changing the default font with iFonts made quite a difference already.

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