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From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Jani Nikula <jani.nikula@linux.intel.com>,
	Daniel Vetter <daniel@ffwll.ch>
Cc: intel-gfx <intel-gfx@lists.freedesktop.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	dri-devel <dri-devel@lists.freedesktop.org>,
	Rodrigo Vivi <rodrigo.vivi@intel.com>
Subject: Re: Bad flicker on skylake HQD due to code in the 4.7 merge window
Date: Fri, 17 Jun 2016 16:06:55 -0700	[thread overview]
Message-ID: <1466204815.2199.2.camel@HansenPartnership.com> (raw)
In-Reply-To: <87vb18uef2.fsf@intel.com>

On Fri, 2016-06-17 at 16:34 +0300, Jani Nikula wrote:
> On Fri, 17 Jun 2016, Daniel Vetter <daniel@ffwll.ch> wrote:
> > On Thu, Jun 16, 2016 at 03:42:12PM -0700, James Bottomley wrote:
> > > On Thu, 2016-06-16 at 14:29 -0700, James Bottomley wrote:
> > > > On Thu, 2016-06-16 at 23:24 +0200, Daniel Vetter wrote:
> > > > > I guess we'll need the bisect on this one to make progress.
> > > > 
> > > > Sigh, I was afraid that might be the next step.
> > > 
> > > OK, I have a curious data point.  I assumed the problem would be
> > > somewhere in the drm update, so I started bisecting that at the
> > > top. 
> > >  However, the top most commit:
> > > 
> > > commit 1d6da87a3241deb13d073c4125d19ed0e5a0c62c
> > > Merge: 1f40c49 a39ed68
> > > Author: Linus Torvalds <torvalds@linux-foundation.org>
> > > Date:   Mon May 23 11:48:48 2016 -0700
> > > 
> > >     Merge branch 'drm-next' of
> > > git://people.freedesktop.org/~airlied/linux
> > > 
> > > Isn't actually bad.  There's no flicker here, so whatever caused
> > > the
> > > problem came from some update after this.
> > 
> > There was a fixes pull after this. Might be worth it to restrict to
> > just
> > the i915 changes, which are just
> > 5b4fd5b1111b1230cd037..157d2c7fad0863222
> > 
> > Looking at those nothing seems to stick out which might explain
> > what's
> > happening for you.

OK, so just on the firmware, the system seems less flickery with the
new 1.4.3 UEFI, so I'm starting to think it is a Skylake errata issue. 
 The flicker isn't gone for good, but seems to be reboot dependent
(it's there in some boots, but gone on a reboot).

> This should be easy enough to try before bisecting:
> http://patchwork.freedesktop.org/patch/msgid/1466162081-12042-1-git-s
> end-email-mika.kahola@intel.com

Applying this didn't seem to make a difference: still there on some and
gone on other reboots.

James


_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

WARNING: multiple messages have this Message-ID (diff)
From: James Bottomley <James.Bottomley@HansenPartnership.com>
To: Jani Nikula <jani.nikula@linux.intel.com>,
	Daniel Vetter <daniel@ffwll.ch>
Cc: intel-gfx <intel-gfx@lists.freedesktop.org>,
	dri-devel <dri-devel@lists.freedesktop.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Rodrigo Vivi <rodrigo.vivi@intel.com>
Subject: Re: [Intel-gfx] Bad flicker on skylake HQD due to code in the 4.7 merge window
Date: Fri, 17 Jun 2016 16:06:55 -0700	[thread overview]
Message-ID: <1466204815.2199.2.camel@HansenPartnership.com> (raw)
In-Reply-To: <87vb18uef2.fsf@intel.com>

On Fri, 2016-06-17 at 16:34 +0300, Jani Nikula wrote:
> On Fri, 17 Jun 2016, Daniel Vetter <daniel@ffwll.ch> wrote:
> > On Thu, Jun 16, 2016 at 03:42:12PM -0700, James Bottomley wrote:
> > > On Thu, 2016-06-16 at 14:29 -0700, James Bottomley wrote:
> > > > On Thu, 2016-06-16 at 23:24 +0200, Daniel Vetter wrote:
> > > > > I guess we'll need the bisect on this one to make progress.
> > > > 
> > > > Sigh, I was afraid that might be the next step.
> > > 
> > > OK, I have a curious data point.  I assumed the problem would be
> > > somewhere in the drm update, so I started bisecting that at the
> > > top. 
> > >  However, the top most commit:
> > > 
> > > commit 1d6da87a3241deb13d073c4125d19ed0e5a0c62c
> > > Merge: 1f40c49 a39ed68
> > > Author: Linus Torvalds <torvalds@linux-foundation.org>
> > > Date:   Mon May 23 11:48:48 2016 -0700
> > > 
> > >     Merge branch 'drm-next' of
> > > git://people.freedesktop.org/~airlied/linux
> > > 
> > > Isn't actually bad.  There's no flicker here, so whatever caused
> > > the
> > > problem came from some update after this.
> > 
> > There was a fixes pull after this. Might be worth it to restrict to
> > just
> > the i915 changes, which are just
> > 5b4fd5b1111b1230cd037..157d2c7fad0863222
> > 
> > Looking at those nothing seems to stick out which might explain
> > what's
> > happening for you.

OK, so just on the firmware, the system seems less flickery with the
new 1.4.3 UEFI, so I'm starting to think it is a Skylake errata issue. 
 The flicker isn't gone for good, but seems to be reboot dependent
(it's there in some boots, but gone on a reboot).

> This should be easy enough to try before bisecting:
> http://patchwork.freedesktop.org/patch/msgid/1466162081-12042-1-git-s
> end-email-mika.kahola@intel.com

Applying this didn't seem to make a difference: still there on some and
gone on other reboots.

James

  parent reply	other threads:[~2016-06-17 23:06 UTC|newest]

Thread overview: 72+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-30 19:59 Bad flicker on skylake HQD due to code in the 4.7 merge window James Bottomley
2016-05-31  7:51 ` Jani Nikula
2016-05-31 13:33   ` James Bottomley
2016-05-31 13:33     ` James Bottomley
2016-06-13 10:14     ` Jani Nikula
2016-06-13 10:14       ` Jani Nikula
2016-06-16 21:15       ` James Bottomley
2016-06-16 21:24         ` Daniel Vetter
2016-06-16 21:24           ` [Intel-gfx] " Daniel Vetter
2016-06-16 21:29           ` James Bottomley
2016-06-16 21:29             ` James Bottomley
2016-06-16 22:42             ` James Bottomley
2016-06-16 22:42               ` [Intel-gfx] " James Bottomley
2016-06-17  7:28               ` Daniel Vetter
2016-06-17  7:28                 ` [Intel-gfx] " Daniel Vetter
2016-06-17 13:34                 ` Jani Nikula
2016-06-17 13:34                   ` [Intel-gfx] " Jani Nikula
2016-06-17 16:08                   ` James Bottomley
2016-06-17 23:06                   ` James Bottomley [this message]
2016-06-17 23:06                     ` James Bottomley
2016-06-19 21:53                     ` James Bottomley
2016-06-19 21:53                       ` [Intel-gfx] " James Bottomley
2016-06-20  8:03                       ` Jani Nikula
2016-06-20  8:03                         ` Jani Nikula
2016-06-21 13:53                         ` James Bottomley
2016-06-21 13:53                           ` [Intel-gfx] " James Bottomley
2016-06-21 15:44                           ` Ville Syrjälä
2016-06-21 15:44                             ` [Intel-gfx] " Ville Syrjälä
2016-06-21 21:00                             ` James Bottomley
2016-06-21 21:00                               ` [Intel-gfx] " James Bottomley
2016-06-23 11:25                               ` James Bottomley
2016-06-23 11:25                                 ` James Bottomley
2016-07-02  6:24                                 ` Thorsten Leemhuis
2016-07-02  6:24                                   ` [Intel-gfx] " Thorsten Leemhuis
2016-07-07 16:14                             ` Ville Syrjälä
2016-07-07 16:14                               ` Ville Syrjälä
2016-07-07 16:55                               ` James Bottomley
2016-07-07 16:55                                 ` James Bottomley
2016-07-07 19:19                                 ` James Bottomley
2016-07-07 19:19                                   ` James Bottomley
2016-07-08 10:19                                   ` Ville Syrjälä
2016-07-08 10:19                                     ` Ville Syrjälä
2016-07-08 14:48                                     ` James Bottomley
2016-07-08 14:48                                       ` James Bottomley
2016-07-08 16:56                                       ` Ville Syrjälä
2016-07-08 16:56                                         ` [Intel-gfx] " Ville Syrjälä
2016-07-12 12:00                                         ` [PATCH] drm/i915: Ignore panel type from OpRegion on SKL ville.syrjala
2016-07-13 12:04                                           ` Daniel Vetter
2016-07-13 13:09                                             ` Ville Syrjälä
2016-07-13 13:33                                           ` James Bottomley
2016-07-13 13:36                                             ` Ville Syrjälä
2016-07-14 13:12                                           ` Ville Syrjälä
2016-07-12 13:12                                         ` ✗ Ro.CI.BAT: warning for " Patchwork
2016-07-14 13:02                                           ` Ville Syrjälä
2016-09-11 14:10                                   ` [Intel-gfx] Bad flicker on skylake HQD due to code in the 4.7 merge window James Hogan
2016-09-13 13:59                                     ` Jani Nikula
2016-09-13 13:59                                       ` Jani Nikula
2016-06-23 12:52                       ` Steven Newbury
2016-06-23 12:59                         ` Jani Nikula
2016-06-23 12:59                           ` Jani Nikula
2016-06-23 13:14                           ` Steven Newbury
2016-06-23 13:14                             ` [Intel-gfx] " Steven Newbury
2016-06-24 10:59                             ` Chris Wilson
2016-06-24 10:59                               ` [Intel-gfx] " Chris Wilson
2016-06-24 11:48                               ` Steven Newbury
2016-06-24 11:48                                 ` Steven Newbury
2016-06-24 12:42                                 ` Chris Wilson
2016-06-24 12:42                                   ` Chris Wilson
2016-07-12 10:08                                   ` Daniel Vetter
2016-09-14  9:43                       ` Jani Nikula
2016-06-17  8:12             ` Chris Wilson
2016-06-17  8:12               ` [Intel-gfx] " Chris Wilson

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