linux-kernel - Re: S2RAM broken on HP 8530p

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Message-Id: <201004012208.37540.rjw@sisk.pl>
Date:	Thu, 1 Apr 2010 22:08:37 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Parag Warudkar <parag.lkml@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: S2RAM broken on HP 8530p

On Thursday 01 April 2010, Parag Warudkar wrote:
> 
> On Thu, 1 Apr 2010, Rafael J. Wysocki wrote:
> 
> > On Thursday 01 April 2010, Parag Warudkar wrote:
> > > 
> > > Running Ubuntu Lucid 64-bit I noticed suspending fails with current git. 
> > > Unsure since when it started - perhaps a while ago since the stock distro 
> > > kernel 2.6.32-18 also fails to suspend - albeit little differently - 
> > > git will fail before shutting off the display, distro one succeeds in 
> > > shutting off the display and then hangs.
> > > 
> > > Any ideas how to go about debugging this? 
> > 
> > Please first try to suspend after echoing 0 to /sys/power/pm_async.
> 
> No change - hangs the same way as before.
> 
> I recall it used to work with prior kernels and so I tried 2.6.31 from 
> kernel.ubuntu.com/~kernel-ppa/
> 
> mainline/v2.6.31/ but that fails similarly. 
> 
> May be I could try 2.6.30 but from a bisect stand point thats not all that 
> attractive even if we find it works..

Yeah, kind of.

Please try:

# echo devices > /sys/power/pm_test
# echo mem > /sys/power/state

and see if that breaks too (it should get back to the command line in about
5-10 seconds).

Rafael
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