[ltp] weird occasional freezes on my thinkpad r60

[Henrique de Moraes Holschuh]

On Mon, 28 Jan 2008, Peter Jordan wrote:
> I have weird occasional freezes on my thinkpad r60 (debian lenny, kernel
> 2.6.24 (and earlier), thinkpad_acpi, tuxonice, tp_smapi). Most often my
> notebook freezes when i plug in the ac-adapter. I don't know, what the
> problem is and where to search for. the logs say nothing.

Look at /proc/interrupts.  Is your NMI counter zero?  If not, remove all
NMI-causing stuff from your kernel (likely, the NMI watchdog).

> Any ideas or suggestions?

Plugging the AC adapter causes a SMI, then ACPI activity (interrupt, etc),
then an ACPI event to userspace.  Could be anything, from hardware, thorough
kernel, to userspace trying to up brightness, etc.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh