Subject: Re: Bogus ACPI battery information in recent current
To: Steven M. Bellovin <email@example.com>
From: Sverre Froyen <firstname.lastname@example.org>
Date: 12/15/2007 20:09:37
On Saturday 15 December 2007, you wrote:
> On Sat, 15 Dec 2007 18:42:24 +0000
> "Steven M. Bellovin" <email@example.com> wrote:
> > On Sat, 15 Dec 2007 10:59:30 -0700
> > Sverre Froyen <firstname.lastname@example.org> wrote:
> > > Hi,
> > >
> > > After a cvs update this morning, envstat reports sensible values for
> > > the battery and the delays are gone (fixed perhaps by acpi_ec.c
> > > revision 1.46).
Please note that I did a full cvs update. My intent was to just update the
acpi_ec.c file, but my cvs update in the acpi directory pulled over several
additional updates and eventually I had to update the whole source tree. My
user land is from 6 Dec.
> > I think I'm still seeing some delays, though I haven't monitored that
> > closely. I did run 'envstat -i 5' for about 45 minutes, with no
> > failures of battery charge level or state.
> In a 2 hour test, polling battery state every 5 seconds (envstat -i 5),
> I'm still seeing some failures, though not as many as before:
I've been running time envstat in a shell loop every 30 sec for several hours
and every "real" time was less than 0.1 sec.
> $ sort /tmp/battlog | uniq -c
> 3 charge: 64.480 Wh (95.81%)
> 297 charge: 65.610 Wh (97.49%)
> 563 charge: 65.630 Wh (97.52%)
> 1 charge: 412.640 Wh (613.14%>)
> 4 charge: 417.760 Wh (620.74%)
> 819 charge state: NORMAL
> 49 charge state: CRITICAL
I get a much more consitent result:
144 charge: 43.710 Wh (97.18%)
180 charge: 43.720 Wh (97.20%)
176 charge: 43.730 Wh (97.22%)
500 charge state: NORMAL
> Also note that it only did 868 polls; in two hours, it should have done
> 1440 of them if each poll took 0 time.
> > > There is a (minor) remaining issue in that the AC adaptor is
> > > reported as ON (present) even when I disconnect it.
More testing shows that its state is detected correctly at boot but that it
never changes after that (no matter how many times I connect or disconnect
> > Hmm -- does estd notice that it's disconnected?
> On my T42, powerd does notice AC adapter disconnects.
This is a little strange since I am using a T42 as well (IBM 2378FVU). BIOS
version is 3.23 and embedded controller version is 3.04 (both of them should
be up to date).