linux-kernel - Re: Hibernation broken since commit 274ad65c9d02 ("drm/radeon: hard reset r600 and newer GPU when hibernating.")

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Message-ID: <20160915123216.GE13132@amd>
Date:   Thu, 15 Sep 2016 14:32:16 +0200
From:   Pavel Machek <pavel@....cz>
To:     Sven Joachim <svenjoac@....de>
Cc:     jglisse@...hat.com, christian.koenig@....com,
        Alex Deucher <alexander.deucher@....com>,
        dri-devel@...ts.freedesktop.org,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: Hibernation broken since commit 274ad65c9d02 ("drm/radeon: hard
 reset r600 and newer GPU when hibernating.")

On Mon 2016-09-05 00:20:06, Sven Joachim wrote:
> Recently I got myself a new laptop with the following integrated GPU:
> 
> 00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Mullins [Radeon R3 Graphics] (rev 40)
> 
> I found that hibernation is broken in Linux 4.7+ (it works in Linux 4.6)
> and bisected it to commit 274ad65c9d02 ("drm/radeon: hard reset r600 and
> newer GPU when hibernating.").
> 
> This has already been reported three months ago, but for a much older
> GPU, see the thread starting at
> https://lists.freedesktop.org/archives/dri-devel/2016-June/110050.html.
> The symptoms are exactly the same as described by Boris Petkov in that
> thread: after "systemctl hibernate" the screen goes blank, but the
> machine remains powered on and needs to be power-cycled.

If it is still unfixed, you may want to notify regressions maintainer,
and Linus.

									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html