[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <1466112547.2311.3.camel@HansenPartnership.com>
Date: Thu, 16 Jun 2016 14:29:07 -0700
From: James Bottomley <James.Bottomley@...senPartnership.com>
To: Daniel Vetter <daniel@...ll.ch>
Cc: Jani Nikula <jani.nikula@...ux.intel.com>,
intel-gfx <intel-gfx@...ts.freedesktop.org>,
dri-devel <dri-devel@...ts.freedesktop.org>,
linux-kernel <linux-kernel@...r.kernel.org>,
Rodrigo Vivi <rodrigo.vivi@...el.com>
Subject: Re: [Intel-gfx] Bad flicker on skylake HQD due to code in the 4.7
merge window
On Thu, 2016-06-16 at 23:24 +0200, Daniel Vetter wrote:
> On Thu, Jun 16, 2016 at 11:15 PM, James Bottomley
> <James.Bottomley@...senpartnership.com> wrote:
> > On Mon, 2016-06-13 at 13:14 +0300, Jani Nikula wrote:
> > > On Tue, 31 May 2016, James Bottomley <
> > > James.Bottomley@...senPartnership.com> wrote:
> > > > On Tue, 2016-05-31 at 10:51 +0300, Jani Nikula wrote:
> > > > > 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.
> > > >
> > > > Makes no discernable difference. Current parameter settings
> > > > are:
> > >
> > > Sorry for the silence. Would you mind trying out drm-intel
> > > -nightly
> > > branch of [1]?
> > >
> > > BR,
> > > Jani.
> > >
> > > [1] http://cgit.freedesktop.org/drm-intel
> >
> > No, flicker is still there (and in fact seems worse) with the tree
> > with
> > this commit at the top:
> >
> > commit 3eb202ecc3668583f9ff4338211dbab47d755d1c
> > Author: Daniel Vetter <daniel.vetter@...ll.ch>
> > Date: Thu Jun 16 14:38:54 2016 +0200
> >
> > drm-intel-nightly: 2016y-06m-16d-12h-38m-37s UTC integration
> > manifest
>
> Strange indeed, I hoped the improved watermark code in -nightly would
> help. I assume nothing in dmesg about underruns or something similar?
Not that I can tell. I've attached the full dmesg just in case.
> I guess we'll need the bisect on this one to make progress.
Sigh, I was afraid that might be the next step.
James
View attachment "dmesg.txt" of type "text/plain" (68083 bytes)
Powered by blists - more mailing lists