Hallo,
i have an 8010 (with 3G) and noticed, that with 4.1.2 the device doesnt go to deep sleep anymore.
i installed CPU spy and i see that deep sleep is unused.
Can anyone help or confirm?
is there already a solution?
my note 10.1 is most the times in airplane mode with wlan on for better battery consumption - doesnt need 3g all the time
thank you!
Related
Hi,
Have you checked battery usage during sleep in airplane mode?
I get around 20mA which is almost 2 times more than normal sleeping with gsm radio on.
Rom: Endymion V2.2
i had wifi problems with that radio
that radio is battery drainer.
My standby usage is between 9 and 11 mA so not so bad I think and I dont have any wifi problems with it.
Not ideal! but not ROM related.
rafaelwo said:
Hi,
Have you checked battery usage during sleep in airplane mode?
I get around 20mA which is almost 2 times more than normal sleeping with gsm radio on.
Rom: Endymion V2.2
Click to expand...
Click to collapse
Its nothing to do with the ROM its a general SENSE based problem, that is present on all sense ROM that I've tried. You'll find WIFI=OFF and MOBILE DATA=OFF uses less battery than AIRPLANE=ON which is stupid.
Basically don't use Airplane mode to save battery. If on an actual airplane then power the device off.
I disagree that its Radio related I can get as low as 5-6-7mAh while device sleeps (WIFI=ON MOBILE DATA=OFF)
I was trying to find a way to turn off gsm radio and airplane mode seems to be the only one option. Battery saving is not what I need it for.
As for my device, I found that I get less power usage on mobile data on than wifi on (during sleep) but I can't get under 10mA. This is probably related to gsm signal strength in my area (tured off umts completely) or some background tasks but have no idea which one can I get rid off.
Executive summary = You always want "Keep Wifi on During Sleep" set to "Always" if you care about your battery life.
In post #17 in the "P6210 - Huge Battery Drain on ICS" thread iosandroid found that setting "Settings->Wifi->Menu->Advanced->Keep Wifi on During Sleep" to "Never" caused battery drain. Since I feel this is big bug and my mom told me I'm special I thought I'd start a new thread with some more details on this problem, a more descriptive thread title to highlight this issue and a few questions of my own.
I have a Samsung Galaxy Tab 7.0 Plus (aka GT-P6210) WiFi only tablet that had HC (Honeycomb) when I first got it. To save battery I changed "Settings->Wifi->Menu->Advanced->Keep Wifi on During Sleep" to "Never" (actually think the wording was a little different back in the HC days, but you get the idea). I'm not sure if/how much this helped, but it didn't hurt my battery life.
Shortly after upgrading to ICS (Ice Cream Sandwich) I noticed my battery life was worse. Apparently I wasn't alone since "iosandroid" (see above) had the same problem and solution. That is, if you set Settings->Wifi->Menu->Advanced->Keep Wifi on During Sleep" to "Never" or "Only when plugged in" your better drains much faster when you're tablet is idle. How much faster? In my tests setting this to "Never" drained my battery by 3.10%/hour. If I leave this at its ICS default of "Always" my battery only drains at 0.27%/hour, OVER 10 TIMES BETTER (idle) BATTERY LIFE! See the bottom of this post for a listing of my battery drain tests.
By using "CPU Spy" I could see that with "Keep Wifi on During Sleep" set to "Never" my tablet would never go into deep sleep, but with it set to "Always" my tablet would spend almost all of its time in deep sleep. GSam Battery Monitor showed that "Kernel (Android OS)" was using up most of my battery when this problem is occurring.
This problem isn't limited to ICS, I also got the same results with JB (Jelly Bean). Specifically I used "AOKP Jelly Bean Milestone 1". With stock ICS the default setting is "Always", so only people that mess with their advanced settings will be affected by this. Note that I believe that an OTA upgrade from HC to ICS will retain your previous settings for this. In JB (at least AOKP JB), this problem will have a much wider reach since "Keep Wifi on During Sleep" defaults to "Never".
Now on to my questions:
-Does anyone know the scope of this bug? Does it only affect the P6210, or Samsung devices, or every Android device? iosandroid reported having the same problem with his phone.
-Do I have to open a tech support case with Samsung to report this bug, or is there a better way?
[Battery Drain Tests]
VERSION Keep Wifi on During Sleep? DRAIN RATE
----------------------------------------------------------------------------------------------
HC Always 1.00%/hour (lost 2% total over 2 hours)
HC Never 0.50%/hour (lost 1% total over 2 hours)
ICS Always 0.27%/hour (lost 2% total over 7.5 hours)
ICS Never 3.10%/hour (lost 24% total over 7.75 hours)
JB Always 1.0%/hour (lost 1% total over 1 hour)
JB Never 3.52%/hour (lost 81% total over 23 hours)
-Legend
--HC = Stock Honeycomb (Android 3.2)
--ICS = Stock Ice Cream Sandwich (Android 4.0.4)
--JB = AOKP Jelly Bean Milestone 1 (Android 4.1.2)
-Setting "Keep Wifi on During Sleep?" to "Only when plugged in" behaves the same as "Never" (i.e. it has same battery drain problem)
-Yes, I know my testing time periods vary wildly, but I'm too impatient to wait a day for each of the tests. For example I'm sure JB's "Always On" loss rate is much closer to ICS's.
All I can say or add to this my tenderloin HP touch pad running cm is the same keep wifi on always drains the battery slower than never.
IMO, it would be because of 3G activating when the wifi turn off during sleep.
Try doing your test in Airplane mode to isolate the activation of the Phone radio and stick only to WIFI during your comparison test.
EDIT: ooops! sorry, it just occured to me that you've got a P6210 and not a P6200. My bad.
Airplane mode uses more battery than WiFi always on
viper001 said:
Try doing your test in Airplane mode
Click to expand...
Click to collapse
Yup, my tab is WiFi only. However I did actually test it in airplane mode and found that the battery lost 0.40%/hour (lost 11% total over 27 hours) with airplane mode enabled. This is still worse than the 0.27%/hour you lose when you just leave WiFi on (Keep Wifi on During Sleep? set to Always). This airplane mode battery drain was also unexpected to me, but in googling it seems like this is a common problem.
One last test I did was to manually turn the WiFi off. When I did that the battery only drained at a rate of 0.11%/hour (lost 1% total over 9.5 hours). I should test that longer to get a more precise number, but my short test was good enough to show that manually turning WiFi off does actually save power (it's about time something worked as I expected it to .
My next planned test it to use something like AutomateIt to automatically turn off the WiFi after the screen turns off to see if I can automate the WiFi battery savings.
My GT-P6210 also has the same issue after installing Elements HD rom. I never had this issue even after upgrading from honeycomb to ICS stock.i
jim-j said:
Yup, my tab is WiFi only. However I did actually test it in airplane mode and found that the battery lost 0.40%/hour (lost 11% total over 27 hours) with airplane mode enabled. This is still worse than the 0.27%/hour you lose when you just leave WiFi on (Keep Wifi on During Sleep? set to Always). This airplane mode battery drain was also unexpected to me, but in googling it seems like this is a common problem.
One last test I did was to manually turn the WiFi off. When I did that the battery only drained at a rate of 0.11%/hour (lost 1% total over 9.5 hours). I should test that longer to get a more precise number, but my short test was good enough to show that manually turning WiFi off does actually save power (it's about time something worked as I expected it to .
My next planned test it to use something like AutomateIt to automatically turn off the WiFi after the screen turns off to see if I can automate the WiFi battery savings.
Click to expand...
Click to collapse
If you know how, try looking into the build.prop. you'll find that stock wifi. supplicant_scan_interval=15. try a higher number like 90 or 180. this basically lengthens the time for wifi network searches from 15 secs to 90 or 180 seconds respectively.
As Krusty the Clown says, "it's not just good--it's good enough"
viper001 said:
If you know how, try looking into the build.prop. you'll find that stock wifi. supplicant_scan_interval=15. try a higher number like 90 or 180. this basically lengthens the time for wifi network searches from 15 secs to 90 or 180 seconds respectively.
Click to expand...
Click to collapse
I could probably figure out how to change that, but I've decided that just leaving WiFi on all the time gives me good enough battery life. I enjoy troubleshooting these types of technical problems, but unfortunately I must return to debugging my three year old daughter's Dravet Syndrome. Her cognition is deteriorating, so I'm hoping to find a solution or workaround soon. If any of the multimillionaires that read this forum want to fund a cure for Dravet Syndrome, head on over to dravet.org or dravetfoundation.org
I've got this issue on a Chinese Tablet running JB 4.1.1. After some investigation the conclusion I've reached is that the settings are mislabled on the GUI. "Always" results in disconnection from the SSID 15 minutes into sleep (although WIFI is still 'ON'). "Never" keeps WIFI on and connected indefinitely, and if autosync is also on you'll get lots of wake-locks and reduced standby battery life, particularly if you have location reporting on and google maps installed.
neu - smurph said:
I've got this issue on a Chinese Tablet running JB 4.1.1. After some investigation the conclusion I've reached is that the settings are mislabled on the GUI. "Always" results in disconnection from the SSID 15 minutes into sleep (although WIFI is still 'ON'). "Never" keeps WIFI on and connected indefinitely, and if autosync is also on you'll get lots of wake-locks and reduced standby battery life, particularly if you have location reporting on and google maps installed.
Click to expand...
Click to collapse
Interesting results, but that wasn't my experience. For example with WiFi always on my tablet does stay connected to the network all the time. All of these weird issues is about enough to make you want to buy an iPad.
Hi Guys,
Been searching all over for this, but can´t find anything conclusive.
I´ve been looking at my CPU Deep Sleep counters and found out that if I have Bluetooth enabled, being pared or not, the CPU will never go to deep sleep mode.
Is this normal? Even though I have Wifi, GPS, Location, etc enabled, the phjone goes to deep sleep, but as soon as I power the BT, the phone starts using the lowest CPU Mode available in my Governor.
I´m currently using FKU with Franko Kernel r59.
This is not a huge battery drain but at night, without the BT turned on I have like 1% of drain per 4-5 hours and with BT on I get like 5% of drain per the same timeframe.
Thanks for your time reading and helping !
checho.rincon said:
Hi Guys,
Been searching all over for this, but can´t find anything conclusive.
I´ve been looking at my CPU Deep Sleep counters and found out that if I have Bluetooth enabled, being pared or not, the CPU will never go to deep sleep mode.
Is this normal? Even though I have Wifi, GPS, Location, etc enabled, the phjone goes to deep sleep, but as soon as I power the BT, the phone starts using the lowest CPU Mode available in my Governor.
I´m currently using FKU with Franko Kernel r59.
This is not a huge battery drain but at night, without the BT turned on I have like 1% of drain per 4-5 hours and with BT on I get like 5% of drain per the same timeframe.
Thanks for your time reading and helping !
Click to expand...
Click to collapse
R60 solves this.
Thanks!!!
akash3656 said:
R60 solves this.
Click to expand...
Click to collapse
Great!...
Just like 5 minutes after the Relase came along!...
Confirming that now BT doesnt wake up the CPU and "everything" looks Normal!!
Hi everyone... I'm in trouble with my S6, because I can't get into deep sleep. I've noticed that GPSD (Kernel Wakelock) it is causing this issue. Do you know how can I control/deactivave this kernel wakelock without lose GPS function? I read some posts that saying for rename GPSD in "/usr/bin..." but if you do that you'll loose gps function on your cellphone. If anyone knows what to do, I'll appreciate, I'm having a hard battery drain due to GPSD. Thanks
EDIT OBS.: I've noticed that when I turn Flight Mode On and reboot, GPSD is gone and my phone enter in deep sleep. I read something about select "WCDMA ONLY", but like the other solution I posted before, I don't want to loose other connections (LTE, GSM) and reboot everytime I want deep sleep right?!. Someone can help? Thanks
Hi all,
I've had this battery drain for a while and haven't been able to find a solution.
My phone works fine when the GPS is off (I have to turn it on, with the GPS off), but when the GPS is on I get a huge battery drain...seems that the phone never goes to sleep even after switching the GPS off and the only solution is to restart it.
From better battery stats I see there are two kernel wakelocks: GPS and gpswakelock.
Does anyone have the same problem?
Any ideas on how to fix it?
mantish said:
Hi all,
I've had this battery drain for a while and haven't been able to find a solution.
My phone works fine when the GPS is off (I have to turn it on, with the GPS off), but when the GPS is on I get a huge battery drain...seems that the phone never goes to sleep even after switching the GPS off and the only solution is to restart it.
From better battery stats I see there are two kernel wakelocks: GPS and gpswakelock.
Does anyone have the same problem?
Any ideas on how to fix it?
Click to expand...
Click to collapse
Try to disable these in location settings