Hi all,
The Wifi on my SGSII is constantly scanning even though it is connected to my home wifi network (a WPA/WPA2 PSK secured connection on a G band router). The signal strength is "excellent" and I have the phone sitting right next to the router. Further, I have network notification turned off ( unchecked) and under advanced settings, my Wifi sleep Policy is set to "never".
Sprint users have reported exactly the same problem on the Epic Touch 4G" (http://forum.xda-developers.com/showthread.php?t=1272226 ). Has anyone else been experiencing the same issue on their ATT SGS2 ? I would be very grateful if someone could post a solution for this issue.
Thanks in advance
J
PS: My wifi setting screen looks like this genteman's ( except i have network notification turned off)
(http://keithandlaura.smugmug.com/Other/test/i-sMwh6bj/0/L/SC20110921-212528-L.png)
jwlkr said:
Hi all,
The Wifi on my SGSII is constantly scanning even though it is connected to my home wifi network (a WPA/WPA2 PSK secured connection on a G band router). The signal strength is "excellent" and I have the phone sitting right next to the router. Further, I have network notification turned off ( unchecked) and under advanced settings, my Wifi sleep Policy is set to "never".
Sprint users have reported exactly the same problem on the Epic Touch 4G" (http://forum.xda-developers.com/showthread.php?t=1272226 ). Has anyone else been experiencing the same issue on their ATT SGS2 ? I would be very grateful if someone could post a solution for this issue.
Thanks in advance
J
PS: My wifi setting screen looks like this genteman's ( except i have network notification turned off)
(http://keithandlaura.smugmug.com/Other/test/i-sMwh6bj/0/L/SC20110921-212528-L.png)
Click to expand...
Click to collapse
Scan rate is bumped up significantly when you're in the settings menu.
Have you confirmed via logcat that it's scanning frequently outside of the settings menu? It shouldn't be in that case - but without logcat it's almost impossible to tell.
Entropy512 said:
Scan rate is bumped up significantly when you're in the settings menu.
Have you confirmed via logcat that it's scanning frequently outside of the settings menu? It shouldn't be in that case - but without logcat it's almost impossible to tell.
Click to expand...
Click to collapse
Entropy,
What should I be looking for in logcat? I have Betterbattery stats installed and according to that, Wifi scan time is 8+ hours even though Wifi on time is only 2+ hours. That doesn't seem to make sense, but what do I know.
I am running UnNamed 1.3.1.
johny_i said:
Entropy,
What should I be looking for in logcat? I have Betterbattery stats installed and according to that, Wifi scan time is 8+ hours even though Wifi on time is only 2+ hours. That doesn't seem to make sense, but what do I know.
I am running UnNamed 1.3.1.
Click to expand...
Click to collapse
I believe BBS is reporting scan time improperly. I've seen that in a few threads.
Sent from my GT-P7510 using Tapatalk
You're probably right, except now scan time doesn't even show.
I have also observed this on my phone.
I have a Samsung Galaxy IIs, using a Sony Ericsson MW600 BT handsfree as well as a Pioneer car Bluetooth handsfree system.
I have not measured anything yet, but I notice that when the Wi-Fi scanning is going on, I get significant disturbances on both of my Bluetooth hands-free sets. Listening to music is without a hitch, but talking on the phone (Norwegian GSM - operator Telenor) is terrible.
i also noted this after installing the OTA update to 2.3.6 today. I just rooted mine yesterday after reading 54+ pages to make sure i understood everything. i had a cappy and loved installing new roms but have not taken the plunge yet on the sgs ii. I haven't noticed a huge difference in battery yet, but it has only been a couple of hours since the update.
What ROM are you running? You can edit the build.prop to change how often it looks for networks. It is the line "wifi.supplicant_scan_interval=xx". I set mine to 180 which is 3 minutes, some ROM's set it really low. Also the scan rate is bumped up significantly when you're in the settings menu like Entrophy said.
Hi,
I had the same problem where my WIFI was fluctuating.... I dont know if this is the problem/ solution but this is what happened...
My SGS 2 is already rooted and unlocked. I had flashed the Entrophy DD 12/23 first then I had flashed Unnamed Custom ROM. After rebooting the phone, I saw the Wifi was not stable. So I again did a "Wipe Factory Data Reset" and "Wipe Cache Partition" and then installed the Unnamed Custom ROM from the SD Card. My Wifi is pretty stable now.
I am not sure if you guys had this issue when flashing a ROM but this seemed to fix it.
Wifi Scan - Milliwatts
ktoonsez said:
What ROM are you running? You can edit the build.prop to change how often it looks for networks. It is the line "wifi.supplicant_scan_interval=xx". I set mine to 180 which is 3 minutes, some ROM's set it really low. Also the scan rate is bumped up significantly when you're in the settings menu like Entrophy said.
Click to expand...
Click to collapse
I have written about this wifi-battery drain a while back here in XDA.
When I used to have my Nokia symbian cell phone I used to flash custom roms
and there were a lot of nice new features after flashing.
A couple of the really nice battery saving mods were:
#1: added option to change the amount of wifi milliwatt output from 18 milliwatts (default) to 3 milliwatts
which is more than enough if the phone is no more than 20-25 feet from the wireless router.
(the mod gave the option of 3mw,6mw,12mw & 18mw)
Saves a lot of battery life.
Don't know why none of the DEVS have addressed this issue yet.
#2: added a mod so once the wifi establishes a connection it no longer scans
at all unless the connection is disconnected or lost.
So in other words, the phone only scans for wifi until it connects.
Right now I am connected to wifi with my phone and yet in settings it displays "scanning"
non-stop-constantly even though in wifi settings it displays "connected".
Why should the phone be scanning for wifi if it's already connected? (I have no idea).
Don't know why none of the DEVS have addressed this issue yet either.
Both of these mods really made a noticable difference in battery life
for for me since I do use the wifi feature in my phone a lot.
Hopefully one of the DEVS can look into these issues soon.
Now someone mentioned wifi constant scan, I noticed mine is doing the same thing. I leave the wifi setting screen on, it re-scans every 3 seconds!
Misterjunky said:
I have written about this wifi-battery drain a while back here in XDA.
When I used to have my Nokia symbian cell phone I used to flash custom roms
and there were a lot of nice new features after flashing.
A couple of the really nice battery saving mods were:
#1: added option to change the amount of wifi milliwatt output from 18 milliwatts (default) to 3 milliwatts
which is more than enough if the phone is no more than 20-25 feet from the wireless router.
(the mod gave the option of 3mw,6mw,12mw & 18mw)
Saves a lot of battery life.
Don't know why none of the DEVS have addressed this issue yet.
#2: added a mod so once the wifi establishes a connection it no longer scans
at all unless the connection is disconnected or lost.
So in other words, the phone only scans for wifi until it connects.
Right now I am connected to wifi with my phone and yet in settings it displays "scanning"
non-stop-constantly even though in wifi settings it displays "connected".
Why should the phone be scanning for wifi if it's already connected? (I have no idea).
Don't know why none of the DEVS have addressed this issue yet either.
Both of these mods really made a noticable difference in battery life
for for me since I do use the wifi feature in my phone a lot.
Hopefully one of the DEVS can look into these issues soon.
Click to expand...
Click to collapse
Power control - Not likely, unless there is some documented power control already in the driver it's not going to happen. We're in a bad enough state as it is trying to make the chip not fire interrupts at 1 Hz on the Infuse.
Broadcom is one of the least open source friendly chipset manufacturers on the planet - their drivers have NO comments or documentation whatsoever, and datasheets are not available.
The rescan stuff is probably only addressable on Cyanogenmod, messing with it would require source code for the userland wifi management stuff.
mickey4mice said:
Now someone mentioned wifi constant scan, I noticed mine is doing the same thing. I leave the wifi setting screen on, it re-scans every 3 seconds!
Click to expand...
Click to collapse
As stated earlier in this thread - this is by design. It is assumed that if you're in the settings screen you want to change networks and have an up-to-date list.
I also am having this problem. I am running the rooted UKK6 from entropy512. After turning on my wifi, my battery drained from 90% to 70% in 5 hours with no use. My android OS is running at 80-90%. I don't have any extra apps except for 3g watchdog and CPUSpy and BBS. I do have Go launcher and GoSMS installed. As soon as I turn wifi off, i can see my battery level off under settings. I have searched for the last 2 days for a "fix". no luck.
Battery Drain
hatgirl223 said:
I also am having this problem. I am running the rooted UKK6 from entropy512. After turning on my wifi, my battery drained from 90% to 70% in 5 hours with no use. My android OS is running at 80-90%. I don't have any extra apps except for 3g watchdog and CPUSpy and BBS. I do have Go launcher and GoSMS installed. As soon as I turn wifi off, i can see my battery level off under settings. I have searched for the last 2 days for a "fix". no luck.
Click to expand...
Click to collapse
Try doing a clean flash using "wipe data/factory reset" in CWM
recovery and then see if the phone has normal battery drainage.
(which it will if you flash the UnNamed v2.2.1 custom rom)
Then install one app at a time so you can find out exactly which
app is the culprit that causes your excessive battery drain.
This is the best way to trouble shoot battery drainage issues.
You will see that your battery drainage issue is not caused by
the custom rom, but it is caused by a few apps which are just
not very battery friendly.
The UnNamed v2.2.1 rom is the best custom rom currently
available for our i777 phones and it has outstanding battery life.
Good Luck!
hatgirl223 said:
I also am having this problem. I am running the rooted UKK6 from entropy512. After turning on my wifi, my battery drained from 90% to 70% in 5 hours with no use. My android OS is running at 80-90%. I don't have any extra apps except for 3g watchdog and CPUSpy and BBS. I do have Go launcher and GoSMS installed. As soon as I turn wifi off, i can see my battery level off under settings. I have searched for the last 2 days for a "fix". no luck.
Click to expand...
Click to collapse
This has nothing to do with this thread - This thread is talking about wifi scanning.
Drain problems - read my known battery drainers thread. A lot of people are having problems, there is no fix, and there won't be until all the people complaining start actually collecting some data.
Has anyone hit an issue whereby battery drain is high on a particular wifi network.
In my case this is a busy (1000s systems in subnet) corporate wlan running EAP-TLS. Many access points.
At home (using speedmod and siyah kernels) battery life is excellent.
But in the office when this occurs battery drain occurs at a similar rate to web browsing. System is not sleeping as much as usual, and it's not all 200 Mhz running either.
Not yet been able to pin down the behaviour, though it occurs with pretty much all user application processes killed (frozen). Disabling wlan puts usage back to normal, re-enabling wlan hits the issue again. going home (no reboot) and onto my home wlan results in normal battery again with high % sleep.
I'm guessing it relates to traffic on the wlan - maybe lots of broadcasts, maybe re-authentication issues.
So has anyone found issues with battery drain in busy WLANs?
Running rom KJ3
May have to get into tracing/wireshark etc to figure this one out...
Hi, I'm currently using ICS Passion v10.6. I do not have a data plan, but am always connected to wifi at my house (router is usually about 3 feet from my phone).
Often my phone will lose google connectivity (wifi and signal bars will go gray), and often, usually when i leave my phone untouched for a while and then check it, i will notice that wifi had been lost and it does not reconnect until i turn the screen back on. I have the wifi sleep policy set to never sleep (keep wifi on: always), and the battery info says that the wifi is constantly on.
I was wondering if a different modem would help or if it is a bug in the rom itself or the kernel? My wifi and google connections would constantly be on 24/7 when I was running bionix v1.3.1. I've tried flashing the KB1 modem which bionix uses, but i get the same result.
Thanks for any help
Hey Devils,
I've had some of the same issues, aslo using 10.6. If I leave my phone alone for a bit it seems to stop getting notifications from data. The best example of this is I use Trillian IM and I can be chatting on it. Finish. And put it aside for awhile and not get any notifications and then when I hit the power button all of a sudden I've got 30 IMs waiting for me.
I have tried several different Vibrant ICS modems from this thread but they all caused big issues for me. some caused massive power drain but all of them caused my lock screen be unresponsive when I hit the power button and I'd have to wait for the screen to blink out and hit the power button again to be able to get access. The same would happen when I get a phone call, sometimes the screen just would not respond when it lit up for an incoming call. I think it was because it would start searching for data connectivity (so it seems related to the problem which makes me think it's not modem related)
In the end, I went back to the KB5 modem and my screen issues seem to have resolved. I may try Passion 11 soon and I'll post results if it helps, but right now I'm not ready to do another change on my phone.
-update- I just checked and saw that v12 is out now and has both a kernel update and an update to wifi. I'll probably try that tonight.
-update- I think this might be being caused by "Deep Sleep" causing the phone to shut down it's data antennas to turn of to save battery. I've installed "NStools" on my phone and set it to set the min CPU freq. to 200mhz to see if that will prevent deep sleep. I'm not certain this tool will work 100% on this build, but we'll see I guess.
I'm also running the Vibrant without data, using wifi to do things with the internet.
Since flashing ICS I haven't had any wifi issues on the two networks that I've used. Seems odd that you are now having them. Have you tried a different hotspot?
I have had issues sending text messages. I can place and receive calls, receive texts but can't send any. Have you had any of these issues? I'm curious if it has to do with the lack of data plan.
I'm using stock rom 4.0.3 LPG with siyah kernel 3.4.1
Seems like the wifi ain't turn off even when I choose (in advance manu) "keep wifi on..." only when plugged in or never.
Nothing really helps..I can still see its on (also on battery monitor) when the device is on deep sleep.
Alao there is no app or service that running and required wifi while it last...
Sometimes its turn it off after ~30 min, sometimes after more then 3 hours (if so).
Anyone have any idea how to make it work or why is it happens?
Well looks like it is not permanent, sometimes its took 1hr of screen off to get wifi sleep and sometimes took 30min to turn it off.
Also forgot to mention that when the WIFI was awake all the time its happened when there is even no WIFI connection around (no routers)...
What could it be ??
any help will appreciate.
So my issue is this:
If i do not have "wifi best performance" checked to "ON", i can watch my wifi settings screen go from On-scanning-connected-off-on-scanning etc about once every ten seconds. This persists until i turn off wifi manually, or check the best performance box. This has happened on three different routers; it has happened while set to 2.4ghz only, and even happened while i had a router locked to channel 6 only.
What the hell is going on, and how do i fix it? i know it's impacting my battery life to keep that turned on...