linux-kernel - Re: [BUG/REGRESSION] Screen flickering

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Message-ID: <87iobw3klc.fsf@intel.com>
Date:	Wed, 13 May 2015 12:14:39 +0300
From:	Jani Nikula <jani.nikula@...ux.intel.com>
To:	Thomas Gummerer <t.gummerer@...il.com>,
	dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org
Cc:	linux-kernel@...r.kernel.org, David Airlie <airlied@...ux.ie>,
	Daniel Vetter <daniel.vetter@...el.com>,
	Thomas Gummerer <t.gummerer@...il.com>, jan@...dor.com,
	Tvrtko Ursulin <tvrtko.ursulin@...el.com>,
	Michael Leuchtenburg <michael@...shhome.org>,
	Matt Roper <matthew.d.roper@...el.com>
Subject: Re: [BUG/REGRESSION] Screen flickering

On Tue, 12 May 2015, Thomas Gummerer <t.gummerer@...il.com> wrote:
> Hi,
>
> I noticed that on my machine the screen starts to flicker after I
> suspend and resume my machine, on the main laptop display if an external
> display is attached with kernel v4.1-rc1.  I tracked the regression down
> to commit c9f038a1a592 ("drm/i915: Don't assume primary & cursor are
> always on for wm calculation (v4)"), and sent a patch that fixes that
> behavior at [1] about two weeks ago, although I'm not sure it's the
> right thing to do, as I'm not very familiar with the code.  The same bug
> still exists in vv4.1-rc3.
>
> Jan Niehusmann confirmed the behavior, but there has been no further
> discussion on the topic.  I also forgot to cc the people that were
> involved in the patch that caused the regression (sorry about that).
>
> Is there anything else that I can do to help fixing this issue?

Is this the same as https://bugzilla.kernel.org/show_bug.cgi?id=98141 ?

BR,
Jani.


>
> Thanks,
> Thomas
>
> [1] http://lists.freedesktop.org/archives/intel-gfx/2015-April/065494.html

-- 
Jani Nikula, Intel Open Source Technology Center
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