Hoary Thinkpad T40 hang on APM battery?

[Justin Mason]

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Nathan R. Valentine writes:
> FWIW, I've disabled both ACPI and APM via /boot/grub/menu.list's
> "apci=off apm=off" and been running from battery as a test. I've had no
> crashes since making that change. That doesn't help much (still need
> power management!) but it does point to the stability issues being in
> power management support for the T40 rather than in some other
> sub-system. 

Hi Nathan --

good, I'm not the only one! ;)

I'm now trying the Hoary kernel package version of the kernel, instead
of my own build of the vanilla 2.6.10 or 2.6.6.  So far, no crashes,
running from battery on 3 occasions for about 50 minutes avg each.
I'll keep the list updated, if I do get another crash.

BTW, the magic SysRq key doesn't work post-crash, as far as I can see --
it works as expected before the crash, but does nothing once the crash has
occurred.  So the bug does seem likely to be Thinkpad BIOS- or
kernel-related.

- --j.
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