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

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Message-ID: <871t4ibr7k.fsf@intel.com>
Date:	Tue, 31 May 2016 10:51:27 +0300
From:	Jani Nikula <jani.nikula@...ux.intel.com>
To:	James Bottomley <James.Bottomley@...senPartnership.com>,
	intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Rodrigo Vivi <rodrigo.vivi@...el.com>
Subject: Re: Bad flicker on skylake HQD due to code in the 4.7 merge window

On Mon, 30 May 2016, James Bottomley <James.Bottomley@...senPartnership.com> wrote:
> 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.

Please try i915.enable_psr=0 module parameter.

BR,
Jani.

-- 
Jani Nikula, Intel Open Source Technology Center