linux-kernel - Bad flicker on skylake HQD due to code in the 4.7 merge window

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Message-ID: <1464638381.2240.3.camel@HansenPartnership.com>
Date:	Mon, 30 May 2016 12:59:41 -0700
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Cc:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Bad flicker on skylake HQD due to code in the 4.7 merge window

I've tested a pristine 4.6.0 system, so it's definitely something that
went in during the merge window.  The flicker isn't continuous, it's
periodic, with an interval of something like 2-5 seconds.  It looks
like an old analogue TV going out of sync and then resyncing.  I've
attached the dmesg and X.org log below just in case they can help.  I
might be able to bisect this next week, but, unfortunately, this is my
current laptop and I'm travelling this week.

James

View attachment "Xorg.0.log" of type "text/x-log" (27983 bytes)

View attachment "dmesg.txt" of type "text/plain" (68292 bytes)