ARPM shutdown oops (Re: [stable] [patch 09/12] Fix SMP poweroff hangs)

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From: Linus Torvalds
Date: Wednesday, October 10, 2007 - 7:57 am

On Tue, 9 Oct 2007, Kevin wrote:

Heh, yeah, that's what I used to do too (and still do if a camera isn't 
handy).


Ahh. APM. That does explain the strange EIP register values: we're jumping 
into the BIOS, and the BIOS is doing something unexpected.

However, that doesn't really explain the oops, because I don't think 
anything changed in APM from 2.6.22->23, and in particular, I don't think 
it has anything to do with the thing that caused problems for PPC.

We did have some APM *detection* changes, and maybe APM wasn't even 
detected for you before, or it was detected differently. That would be due 
to the bootup changes, I'm Cc'ing Peter Anvin (and the kernel mailing 
list, in case somebody else see a pattern to this).

Can you please
 - try with APM turned off (APM really shouldn't be useful on any machines 
   built in the last ten years or so), just to verify that things work 
   without APM.
 - send the bootup "dmesg" output and a machine description (and please 
   keep people Cc'd - sending things just to me is a sure-fire way to get 
   things dropped eventually, if only because I'm a lazy clutz).
 - what was the last kernel that worked (and if you can bisect the 
   problem, that would likely help enormously)

Thanks,

		Linus
-
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Messages in current thread:
ARPM shutdown oops (Re: [stable] [patch 09/12] Fix SMP pow ..., Linus Torvalds, (Wed Oct 10, 7:57 am)
Re: ARPM shutdown oops (Re: [stable] [patch 09/12] Fix SMP ..., Rafael J. Wysocki, (Thu Oct 11, 1:55 pm)
Re: APM shutdown oops (Re: [stable] [patch 09/12] Fix SMP ..., Rafael J. Wysocki, (Fri Oct 12, 5:05 am)