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

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Message-ID: <CADnq5_MQD3rdoqyTjyke7Udn05hq_tRU+-SQKGHp0Je-VPRTYA@mail.gmail.com>
Date:   Thu, 15 Sep 2016 10:31:48 -0400
From:   Alex Deucher <alexdeucher@...il.com>
To:     Jerome Glisse <jglisse@...hat.com>
Cc:     Sven Joachim <svenjoac@....de>,
        Alex Deucher <alexander.deucher@....com>,
        Christian König <christian.koenig@....com>,
        Maling list - DRI developers 
        <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, Sep 5, 2016 at 10:25 PM, Jerome Glisse <jglisse@...hat.com> 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.
>>
>> Any suggestions would be welcome.
>>
>> Cheers,
>>        Sven
>
> I guess we can invert the logic and only do it for the GPU for which it fix
> hibernation.

Do you remember which asics this fixed?

Alex

>
> Cheers,
> Jérôme
> _______________________________________________
> dri-devel mailing list
> dri-devel@...ts.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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