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SubjectRe: ACPI crash on lid close - SMP race?
well, there is a bug report for this problem:

and there are some bug reports for a similar problem (system crashes on
lid close if _DOS=1, but on a UP platform).

but unfortunately we haven't made any progress in this issue. :(


On Tue, 2008-11-11 at 00:11 +0800, Matthew Garrett wrote:
> If the _DOS flag on my HP 2510p is set to 0 (ie, signal OS when screen
> notification is requested, don't change automatically) then it'll crash
> on random lid open/closes. The trace generally makes little sense and
> depends on the kernel version and phase of the moon. I'd ignored this as
> firmware brokenness up until lately, but since having _DOS set to 0 is
> the only way to get a notification when the display switch key is
> pressed on this machine I'd be interested in fixing it properly.
> Unfortunately, I've got no real idea what on earth is going on. The only
> clue I've found so far is that booting with maxcpus=1 leaves it working
> perfectly. What parts of the ACPI stack could be triggering this?

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