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Subject: Re: EeePC 900 reboots/hangs when using using perf -a -f -g
From: Peter Zijlstra <peterz@infradead.org>
To: Sitsofe Wheeler <sitsofe@yahoo.com>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
        Corentin Chary <corentincj@iksaif.net>, fweisbec <fweisbec@gmail.com>
In-Reply-To: <20100912102854.GA7359@sucs.org>
References: <20100912102854.GA7359@sucs.org>
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Date: Sun, 12 Sep 2010 12:57:07 +0200
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On Sun, 2010-09-12 at 11:28 +0100, Sitsofe Wheeler wrote:
> Hi,
> 
> On an EeePC 900 running 2.6.36rc3 I've been finding that the laptop
> immediately reboots or hangs forever if I run
> 
> perf -a -f -g xset dpms force off
> 
> . I've got lockdep checking and stack overflow checking on but these
> don't make any difference. Using only -a -f doesn't show the problem. I
> have also found that disabling eeepc-laptop in the kernel config also
> removes the problem.
> 
> Any suggestions?

Bisect it?

Does .35 work? If so, you could try it with the .35 version of
eeepc-laptop driver to see if its something specific to that driver, or
if its something we did to the stack unwinding code.

Most curious issue..