linux-kernel - Re: [PATCH/RFC] i915: fix screen flickering

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Message-ID: <20150502114733.GA6419@x61s.reliablesolutions.de>
Date:	Sat, 2 May 2015 13:47:34 +0200
From:	Jan Niehusmann <jan@...dor.com>
To:	Thomas Gummerer <t.gummerer@...il.com>
Cc:	dri-devel@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org, David Airlie <airlied@...ux.ie>,
	Jani Nikula <jani.nikula@...ux.intel.com>,
	Daniel Vetter <daniel.vetter@...el.com>
Subject: Re: [PATCH/RFC] i915: fix screen flickering

On Wed, Apr 29, 2015 at 12:23:43AM +0200, Thomas Gummerer wrote:
> I forgot to mention, the bug only occurs after suspending the system and
> waking it up again.  In that case, moving the mouse pointer around on
> the build in laptop screen triggers the flickering, while the external
> monitor works just fine.

My Lenovo X201s shows the same symptoms with v4.1.0-rc1, and your patch
seems to help.

Another detail: The flickering only happens when both outputs are
active, using xrandr to disable one output makes the other one working
fine, again.

> Might be unrelated, but I only managed to trigger the bug when the
> system is suspended after the synergy server has started.

I don't have synergy installed, so this can't be a strict requirement
for triggering the bug.

Jan

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