another wifi issue on n900...help needed - maemo.org

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nishant.iim	2010-07-24 , 08:39
Posts: 9 \| Thanked: 0 times \| Joined on Jul 2010	#1

I have observed that after full re charge of my n900...if i do not use wifi....the battery lasts long enough. However, if i use wifi for..lets say 5 mins, and then manually disconnect it ....and let the phone just lie idle...the battery quickly drains. Other settings are GPS off, brightness lowest, 3G off.

Does it mean that the even after manually disconnecting wifi, it stilld drains the battery?

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6sicSIX	2010-07-24 , 08:44
Posts: 162 \| Thanked: 24 times \| Joined on Feb 2010 @ Essex, UK	#2

Hmm... I have never experienced this, have you tried turning offline mode on and then off again after disconnecting wifi?

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nishant.iim	2010-07-24 , 09:23
Posts: 9 \| Thanked: 0 times \| Joined on Jul 2010	#3

Originally Posted by 6sicSIX

Hmm... I have never experienced this, have you tried turning offline mode on and then off again after disconnecting wifi?

havent tried this...lemme see

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adhiemsumitro	2010-07-24 , 10:40
Posts: 25 \| Thanked: 3 times \| Joined on Jun 2010	#4

i think we have similar problem. wifi drains battery so fast even after manually disconnect it.

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	jd4200	2010-07-24 , 10:53
	Posts: 451 \| Thanked: 424 times \| Joined on Apr 2010 @ England	#5

I've never noticed such problem.
You might have an application running that, once you have initiated a connection, they fail to see there is no active connection and are constantly still trying to use it, or are searching for one?

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Last edited by jd4200; 2010-07-24 at 10:55.

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ahmadamaj	2010-07-24 , 11:14
Posts: 223 \| Thanked: 79 times \| Joined on Apr 2010 @ Lebanon- Beirut	#6

i had such a problem, i noticed that after i disconnect conky still shows a connection even if i was out of the range of the wifi and i had to restart the phone to stop it. I was fixed for me after Pr 1.2

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	jd4200	2010-07-24 , 11:32
	Posts: 451 \| Thanked: 424 times \| Joined on Apr 2010 @ England	#7

Install the battery graph monitor, and repeat the steps your normally take that drains your battery, after say 30 minutes of leaving your phone idle, check how much it has degraded.

Do it again but this time: try initiating a connection then disconnecting, and then try restarting your networking services: [ as root '/etc/init.d/networking restart'], and brining your wireless interface down and back up: [ as root 'ifconfig wlan0 down && sleep 3 && ifconfig wlan0 up'].

Leave your phone to idle for another 30minutes and see if your battery has degraded at the same rate.

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tirtawn	2010-07-24 , 15:29
Posts: 328 \| Thanked: 101 times \| Joined on Dec 2009	#8

Originally Posted by nishant.iim

I have observed that after full re charge of my n900...if i do not use wifi....the battery lasts long enough. However, if i use wifi for..lets say 5 mins, and then manually disconnect it ....and let the phone just lie idle...the battery quickly drains. Other settings are GPS off, brightness lowest, 3G off.

Does it mean that the even after manually disconnecting wifi, it stilld drains the battery?

In PR 1.2 change log, this is listed as fixed. So make sure you are running PR 1.2 firmware.

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nishant.iim	2010-07-24 , 16:18
Posts: 9 \| Thanked: 0 times \| Joined on Jul 2010	#9

Originally Posted by tirtawn

In PR 1.2 change log, this is listed as fixed. So make sure you are running PR 1.2 firmware.

Yes...I am running 1.2 firmware.
I tried the solution proposed earlier. I switched to offline mode and then back to online after 2-3 seconds. That seems to work fine. Now the battery is not draining.

But this doesnt look like a permanent solution. I cant manually go to offline mode than back to online everytime i use wifi. Is there any app that can do this for me automatically?

Also..Is wifi switcher/autodisconnect useful in my problem?

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Alex Atkin UK	2010-07-24 , 16:26
Posts: 716 \| Thanked: 303 times \| Joined on Sep 2009 @ Sheffield, UK	#10

The ForecaWeather widget sometimes seems to cause battery issues, although I think that is when you HAVEN'T let it do its first update yet (eg sat on desktop after fresh reboot).

Generally I find keeping the web browser closed when not in use and keep your default desktop empty of widgets that use the Internet, greatly reduces the chance of battery drain problems.