Re: acpi error messagesbeing

["Steven M. Bellovin" <smb%cs.columbia.edu@localhost>]

On Mon, 14 Jul 2008 18:30:02 -0400
"Steven M. Bellovin" <smb%bellovin.org@localhost> wrote:

> Following a suspend/resume sequence on a Thinkpad T61, I'm seeing the
> following messages:
> 
>       Jul 14 18:27:47 yellowstone /netbsd: ACPI Error
> (exmutex-0483): Cannot release Mutex [BATM], not acquired [20070320]
> Jul 14 18:27:47 yellowstone /netbsd: Jul 14 18:27:47
> yellowstone /netbsd: ACPI Error (psparse-0631): Method
> parse/execution failed [\_SB_.PCI0.LPC_.EC__.GBST] (Node
> 0xffff80000638e640), AE_AML_MUTEX_NOT_ACQUIRED Jul 14 18:27:47
> yellowstone /netbsd: ACPI Error (psparse-0631): Method
> parse/execution fai Jul 14 18:27:47 yellowstone /netbsd: led
> [\_SB_.PCI0.LPC_.EC__.BAT1._BST] (de 0xffff80000638e380),
> AE_AML_MUTEX_NOT_ACQUIRED Jul 14 18:27:47 yellowstone /netbsd:
> acpibat1: failed to evaluate _BST: AE_AML_MUTEX_NOT_ACQUIRED
> 
> What do they mean?  If it matters, I have two batteries installed and
> I'm running on battery now.
> 
It's worse...

At the time that message first appeared, the primary battery was about
full (according to envstat), but the secondary was empty.  I got
messages about the battery being critical, at which point the machine
powered down.  I plugged it in, and the battery light started flashing,
as if both batteries were low.  I unplugged it, removed both batteries,
reinstalled them, plugged the machine in, and left it powered off while
I ate dinner.  The blinking light turned solid, as it should; when I
rebooted, though, I got the same ACPI messages...  Hardware?  Should I
drain both batteries?  Removed the secondary?


                --Steve Bellovin, http://www.cs.columbia.edu/~smb