[maemo-users] Dealing with N900 responsiveness (or lack of thereof)

From: Aniello Del Sorbo anidel at gmail.com
Date: Wed Feb 24 14:35:41 EET 2010
2010/2/23 Michel Dänzer <michel at daenzer.net>:
> On Mon, 2010-02-22 at 12:08 -0600, Paul Hartman wrote:
>> My battery seems the same as always. If I don't make any phone calls
>> it lasts around 13 hours at the most (I'm connected to wifi 90% of the
>> time, phone mostly sits idle).
> That seems very low. I can easily go for three days between charging,
> and I've gone up to slightly more than 100 hours. I rarely make phone
> calls, but I'm connected to WiFi (and logged into Skype and Jabber
> accounts) at least half the time as well and regularly do package
> installs/upgrades, SMS/IM and general tinkering.
>> If I made phone calls the life is shorter, and especially if I used
>> speakerphone it seems like a 5-minute call can take away 1 hour of
>> battery life... :)
> That's probably due to CPU usage, which IME can take a huge toll on the
> battery. When the device is (supposedly) idle, make sure that e.g. htop
> doesn't show any significant CPU usage by any process other than itself
> (and Xorg and osso-xterm, if you're running it on the device display).
> I suspect the display brightness could also make a big difference for
> battery life, I have it at the lowest setting.
> Also FWIW I have Bluetooth disabled and am only using GSM, not 3G, as I
> only use WiFi for internet access.

What I think helps you a lot getting that massively amount of battery
usage time is switching to GSM only.
3G is a real resource hog. More than WiFi (as this is heavily optimized).

Putting the LCD brightness to a lower value also helped.

I am switching my device to GSM only and use is as normal.
Afterall I do navigate the web only every now and then, but I mostly
use IM and for that I don't need 3G.
And I can always switch back to 3G is I really need something fast.


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