Subject: Re: Bogus ACPI battery information in recent current
To: Sverre Froyen <email@example.com>
From: Steven M. Bellovin <firstname.lastname@example.org>
Date: 12/14/2007 01:24:13
On Thu, 13 Dec 2007 18:08:19 -0700
Sverre Froyen <email@example.com> wrote:
> On Thursday 13 December 2007, you wrote:
> > On Thursday 13 December 2007, Steven M. Bellovin wrote:
> > > On Thu, 13 Dec 2007 14:27:50 -0700
> > >
> > > Sverre Froyen <firstname.lastname@example.org> wrote:
> > > > With the latest current, I'm seeing bogus values for the battery
> > > > information. An example (4.99.42 from this morning):
> > ...
> > > I wonder if this is related to my "sudden shutdown" issue. (I
> > > alluded to it on tech-userlevel in a different thread.) Here's
> > > some curious output, using a kernel from this afternoon's source:
> > It is indeed. About 30 seconds after I booted the new kernel for
> > the first time, it shut down. after that time, I'm testing in
> > single user mode. I also see the sequence of normal -> critical ->
> > normal -> critical messages. I suspect the reported values keep
> > changing.
> For completeness, I should note that the reboot happened with a
> kernel from a couple of day ago. That kernel reported
> connected: OFF
> even though I am certain that I had the AC adaptor connected. My
> kernel from this morning reported the adaptor correctly as
> connected. I have not done any testing on the variability in the
> values, so I do not know it this is really a difference between the
> two kernels or just randomness in the reported value.
For me, it's been random, with about a 50% probability of either a
shutdown or no problem.
--Steve Bellovin, http://www.cs.columbia.edu/~smb