[hafqa] [hafqa] [Bug 2602] Battery drain low or empty overnight

[From: bugzilla-daemon at maemo.org]

https://bugs.maemo.org/show_bug.cgi?id=2602





------- Comment #35 from vincent-maemo at vinc17.org  2008-10-16 02:47 GMT+3 -------
(In reply to comment #34)
> You could disable all the Home and statusbar applets that you don't need (I
> think CPU meter statusbar applets for example read /proc/ pretty often and the
> banner applet uses network).

The CPU meter status bar applet doesn't seem to be a problem since even if it
is present, the battery usually last several days before a recharge is needed
(does the CPU meter still read /proc when the tablet is locked?).

> The lock + press button keeping the screen undimmed could indeed be one
> factor.

In fact, there's a bug already open about that: bug 2787.

> Could you file a new bug about that and add it as a dependency for this one?

Someone who has the permissions should do this.

> Some card models use more power than others, as a rule larger cards use more. 
> That should happen only when they're being accessed though.  You could try
> "lsof|grep /media/" to see whether something like metalayer-crawler is
> accessing the card.

As the battery doesn't always drain, I don't think the card is a problem
(unless the tablet does something about it I don't know). I should grep
/media/mmc1 actually.

> If the FAT file system on the memory card is corrupted (MicroSoft FAT file
> system is so primitive that it can get easily corrupted, but it's needed for
> compatibility reasons), it can cause processes to access it constantly, but
> usually you should see this in "top".

If it is corrupted, I suppose I should get error messages or something in dmesg
output.

> > wlan0     Link encap:Ethernet  HWaddr 00:1D:6E:9B:D8:F6  
> [...] 
> > though wifi was off
> 
> If you want Wifi off (instead of just not connected to some specific access
> point), use the "offline" mode listed in the Power (button) menu.

This is bad design. If wifi is not used, then it should be completely turned
off by the system (note that I don't use autoconnect). Ditto for the other
radios (which I don't use).


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