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Date:	Tue, 08 Feb 2011 13:36:06 +0000
From:	Chris Wilson <>
To:	Jeff Chua <>, Takashi Iwai <>
Cc:	Linus Torvalds <>,
	"Rafael J. Wysocki" <>, Len Brown <>,
	LKML <>
Subject: Re: Commit 500f7147cf5bafd139056d521536b10c2bc2e154 breaks _resume_

On Mon, 7 Feb 2011 22:11:29 +0800, Jeff Chua <> wrote:
> Same issue encountered even after a fresh build.

I've been testing on the same hardware (x201s, 64bit, with and without
external DP) and I've not encountered the same issue. Every time I look
at the code, by not setting crtc->active we may incorrectly skip disabling
an active output after resume. If the output is inactive, then disabling it
*should* be a no-op, and thus safe. So I am still at a loss to understand
what fails here and so whether we have a bigger problem on our hands.

Please can you add drm.debug=0xe to your boot parameters (or echo 0xe >
/sys/module/drm/parameters/debug might just be enough) and attach the
dmesg whilst resuming. Also attaching the failing Xorg.0.log would be
useful to rule out any other issues.
Chris Wilson, Intel Open Source Technology Centre
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