linux-kernel - Re: resume problem with i915/drm

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Date:	Thu, 7 Aug 2008 14:27:32 -0700
From:	Jesse Barnes <jbarnes@...tuousgeek.org>
To:	Charles@...wieters.org, Matthew Garrett <mjg59@...f.ucam.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: resume problem with i915/drm

On Tuesday, August 5, 2008 7:25 pm Charles@...wieters.org wrote:
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>
> Hi--
>
>   I'm having a problem resuming (from RAM) if the i915 and drm modules
> are loaded (these are needed for running X on my machine). Vanilla
> kernel versions 2.6.25.x and 2.6.26.x. I get the same behavior with
> Debian linux-image-2.6.25-2-686 kernel. I can't believe I'm the first to
> encounter this.
>
> suspend-to-ram and resuming works fine with earlier kernels
> (e.g. 2.6.17), but I haven't tested exhaustively.
>
> Possibly related is a failure in modprobe -r i915 after it is
> loaded. The message printed is

[snip backtrace]

Well the backtrace makes it look like i915 didn't take care to remove some of 
its /proc files, which is weird.

Your "screen blank on resume" problem might be a duplicate of a bug that got 
reported awhile back (can't find it now, Matthew?).  If so, then you're not 
the first one to see it; unfortunately we don't have a fix yet...

Jesse
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