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-   Nokia N810 (https://talk.maemo.org/forumdisplay.php?f=28)
-   -   Battery almost empty after 5 hours with locked N810 (https://talk.maemo.org/showthread.php?t=21736)

vinc17 2008-07-09 15:12
Battery almost empty after 5 hours with locked N810
 
As usual, my N810 charged during the night and I took it in the morning; it was fully charged. But after about 5 hours, when I took my N810 out of my pocket, it was quite hot and the battery was almost empty! This is surprising as I didn't have any problem the previous days. The CPU indicator was saying the N810 was idle. I only had two open applications:
  • X Terminal (with no running jobs in it). This is not the first time (I use X Terminal very often). So, I doubt this is the problem.
  • Notes (perhaps the first time I let it open under diablo).
Also, no wifi, no bluetooth. Any idea? Could there be a problem with some software taking CPU time only when the tablet is locked?

Bundyo 2008-07-09 15:13
Re: Battery almost empty after 5 hours with locked N810
 
Modest likes to eat CPUs for breakfast...

Naah, with no network probably something else.

GeneralAntilles 2008-07-09 15:18
Re: Battery almost empty after 5 hours with locked N810
 
I'm going to call it a corrupt internal card!

But seriously, this has been covered a thousand and one times already. Please use the search first. :)

vinc17 2008-07-09 15:52
Re: Battery almost empty after 5 hours with locked N810
 
I don't use Modest (I read e-mail only via ssh). Concerning a possibly corrupt internal card, I've search for "corrupt" in the FAQ, and got... nothing! How can I check whether it is corrupt? I haven't got any error message and things like that, and I haven't found any error in dmesg output, and nothing during these 5 hours:
Code:
[726568.250000] EAC mode: play enabled, rec enabled
[726570.875000] EAC mode: play disabled, rec disabled
[726602.132812] DSP Pausing failed, skipping OP change!
[726607.804687] slide (GPIO 110) is now closed
[726609.875000] kb_lock (GPIO 102) is now closed
[726610.218750] kb_lock (GPIO 102) is now open
[745790.140625] slide (GPIO 110) is now open

GeneralAntilles 2008-07-09 15:58
Re: Battery almost empty after 5 hours with locked N810
 
Quote:
Originally Posted by vinc17 (Post 200925)
I've search for "corrupt" in the FAQ, and got... nothing!
Er, FAQ?

http://tabletschool.blogspot.com/200...d-on-n810.html

lcuk 2008-07-09 16:04
Re: Battery almost empty after 5 hours with locked N810
 
I get this on occasion - sit with it charging whilst messing on the computer of an evening, then disconnect and goto bed - i disconnect wifi everynight because i *know* thats a problem with me personally.

Random mornings I have woken up and its dead.

There is a process running amock and eating CPU for breakfast, its not being killed by the watchdogs or anything.
And its not a corrupt card issue because it would be a problem all the time.

I've attempted to run top in the past and log output but it doesnt seem too good for the purpose (it could be a low but constant cpu munching, or not cpu at all, maybe wifi chip or BT chip or gps internals or something).

My best guess would be an application run earlier in the evening didnt cleanup and close everything expected which caused the drain.

Further investigation would require the oprofile kernel flags to be set (or built and flashed) and actually monitor whats happening overnight.

Lots of work though for a random rare (but annoying) occurrence.

zehjotkah 2008-07-09 16:05
Re: Battery almost empty after 5 hours with locked N810
 
same here, flashed diablo, set up modest ->battery drain
reflashed diablo without setting up modest ->battery drain
reflashed chinook ->all is fine again

chinook vs. diablo

diablo:
pros
agps, fingertap vs. stylustap recognition, update without flashing
cons
only a half-day battery (n810)

chinook:
pros
two days battery, for me better microb rendering (itt for example)
cons
all diablo pros

vinc17 2008-07-09 16:07
Re: Battery almost empty after 5 hours with locked N810
 
Quote:
Originally Posted by GeneralAntilles (Post 200928)
Er, FAQ?
I looked at http://www.internettablettalk.com/forums/faq.php

I repartitioned my internal 2-GB card in March. This cannot be this problem.

vinc17 2008-07-09 16:15
Re: Battery almost empty after 5 hours with locked N810
 
Quote:
Originally Posted by zehjotkah (Post 200933)
same here, flashed diablo, set up modest ->battery drain
reflashed diablo without setting up modest ->battery drain
reflashed chinook ->all is fine again
I now remember having an almost-emptied battery a few days ago (also after a few hours during the day), and I thought this was my fault. Now, it's probably the same problem. And except once when I started a wifi connection and let it on, I've never had any such problem with chinook.

GeneralAntilles 2008-07-09 16:16
Re: Battery almost empty after 5 hours with locked N810
 
Quote:
Originally Posted by vinc17 (Post 200935)
Uh, the fact that it only contains stuff for BBCode didn't give you a hint? :\

By searching I meant Google. . . .

Quote:
Originally Posted by vinc17 (Post 200935)
I repartitioned my internal 2-GB card in March. This cannot be this problem.
There have been about a half-dozen threads (and more here, several posted just hours before your own :/) on maemo-users that cover pretty much everything you've ever wanted to know about Maemo battery consumption. Might be worth your while to browse through some of them.

This should get you started.

. . . and this is the search you should've performed before posting this thread. ;)


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