Bug#601345: linux-image-2.6.32: wrong battery charge level
----- Forwarded message from Oz Nahum Tiram <nahumoz@gmail.com> -----
From: Oz Nahum Tiram <nahumoz@gmail.com>
To: Ben Hutchings <ben@decadent.org.uk>
Subject: Re: Bug#601345: linux-image-2.6.32: wrong battery charge level
Date: Mon, 25 Oct 2010 19:08:59 +0200
I have compiled linux kernel 2.6.34, and I have installed all the
linux-kernels with vesions 2.6.31.
At the moment, I have 3 operating systems on this laptop.
Debian Squeeze
Ubuntu 10.10
Ubuntu 9.10
When I install the kernel package of Ubuntu 9.10 (2.6.31) in Ubuntu 10.10,
this issue does not occur.
I could not find a debian package of 2.6.31, but like I said, I tried all
the others possible, and it did occur ...
So I believe that this issue is kernel related.
Oz
On Mon, Oct 25, 2010 at 6:47 PM, Ben Hutchings <ben@decadent.org.uk> wrote:
> On Mon, 2010-10-25 at 13:47 +0200, Oz Nahum Tiram wrote:
> > Package: linux-2.6
> > Version: 2.6.32-26
> > File: linux-image-2.6.32
> > Severity: important
> >
> > *** Please type your report below this line ***
> >
> > Hi,
> > I have a laptop which came installed with Ubuntu 9.10. I decided to
> > install Debian on it. I have found that on kernels >2.6.31 the power
> > manager indicated the wrong charge level. Even though the battery is
> > FULLY charged, the battery indicator says it has only ~20%.
> > If I installed older kernels from snapshot.debian.org I didn't have
> > that problem (However font smoothing with older kernel is
> > horrible...).
> >
> > I have seen similar bug reports in Ubuntu, but I wish this bug is
> > handled also in Debian.
> >
> > My laptop battery info is:
> > Vendor: CZCTech
> > Model: U13
> > Serial Number: SN0000
> > info from lshw:
> > description: Notebook
> > product: czc
> > vendor: BRUNEN IT Group
> > version: 1.0
> >
> > *-battery
> > description: Nickel Cadmium Battery
> > product: Nikon Ultra Plus
> > vendor: Nikon Battery
> > physical id: 1
> > version: 08/11/97
> > serial: NI00123
> > slot: Left side of System
>
> This information reported by lshw comes from the BIOS and the battery,
> and it is complete nonsense! I expect that the BIOS is providing
> similarly bogus information about the charge state. But I don't know
> why the ACPI battery driver would have changed the way it interprets
> this.
>
> > See thread here for example:
> > http://ubuntuforums.org/showthread.php?t=1543467&page=2
>
> This could be a similar problem, though no-one seems to specifically say
> that this bug was introduced between Ubuntu 9.10 and 10.04 (i.e. between
> Linux 2.6.31 and 2.6.32).
>
> > and
> > https://bugs.launchpad.net/linux/+bug/218094
> [...]
>
> That bug report is specifically about the msi-laptop driver, and was
> made in 2008.
>
> Ben.
>
> --
> Ben Hutchings
> Once a job is fouled up, anything done to improve it makes it worse.
>
--
Oz Nahum
Graduate Student
Zentrum für Angewandte Geologie
Universität Tübingen
---
Imagine there's no countries
it isn't hard to do
Nothing to kill or die for
And no religion too
Imagine all the people
Living life in peace
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