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* regression bisected: display sync drops after 7221fc33
@ 2016-01-25 16:35 dann frazier
  2016-01-26 11:17 ` Ville Syrjälä
  0 siblings, 1 reply; 9+ messages in thread
From: dann frazier @ 2016-01-25 16:35 UTC (permalink / raw)
  To: Matt Roper; +Cc: Daniel Vetter, intel-gfx


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I've got a Lenovo T410 w/ an external display (DisplayPort<->HDMI). After
upgrading from a 4.2 kernel to a 4.3, I started hitting an issue where
the display thinks it has lost input for a few moments. Oddly, it
usually happens when I start typing in a terminal after a short period
of inactivity.

I see no OS-side symptoms - there are no new messages in dmesg/syslog/Xorg
log, etc. I reproduced with latest Linus master (@ 3e1e21c7b), and then
bisected down to the following commit:

commit 7221fc333dbe1743a3dff155b03527fda90d4ec1
Author: Matt Roper <matthew.d.roper@intel.com>
Date:   Thu Sep 24 15:53:08 2015 -0700

    drm/i915: Eliminate usage of pipe_wm_parameters from ILK-style WM (v2)

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

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: regression bisected: display sync drops after 7221fc33
  2016-01-25 16:35 regression bisected: display sync drops after 7221fc33 dann frazier
@ 2016-01-26 11:17 ` Ville Syrjälä
  2016-01-26 15:10   ` dann frazier
  0 siblings, 1 reply; 9+ messages in thread
From: Ville Syrjälä @ 2016-01-26 11:17 UTC (permalink / raw)
  To: dann frazier; +Cc: Daniel Vetter, intel-gfx

On Mon, Jan 25, 2016 at 09:35:26AM -0700, dann frazier wrote:
> I've got a Lenovo T410 w/ an external display (DisplayPort<->HDMI). After
> upgrading from a 4.2 kernel to a 4.3, I started hitting an issue where
> the display thinks it has lost input for a few moments. Oddly, it
> usually happens when I start typing in a terminal after a short period
> of inactivity.
> 
> I see no OS-side symptoms - there are no new messages in dmesg/syslog/Xorg
> log, etc.

Any fifo underrun reports in dmesg in general?

> I reproduced with latest Linus master (@ 3e1e21c7b), and then
> bisected down to the following commit:
> 
> commit 7221fc333dbe1743a3dff155b03527fda90d4ec1
> Author: Matt Roper <matthew.d.roper@intel.com>
> Date:   Thu Sep 24 15:53:08 2015 -0700
> 
>     drm/i915: Eliminate usage of pipe_wm_parameters from ILK-style WM (v2)

That's not in 4.3.

As far as currentl Linus tree goes, you may want to try these:
http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-2-git-send-email-ville.syrjala@linux.intel.com
http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-1-git-send-email-ville.syrjala@linux.intel.com

-- 
Ville Syrjälä
Intel OTC
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: regression bisected: display sync drops after 7221fc33
  2016-01-26 11:17 ` Ville Syrjälä
@ 2016-01-26 15:10   ` dann frazier
  2016-01-26 16:40     ` dann frazier
  0 siblings, 1 reply; 9+ messages in thread
From: dann frazier @ 2016-01-26 15:10 UTC (permalink / raw)
  To: Ville Syrjälä; +Cc: Daniel Vetter, intel-gfx

On Tue, Jan 26, 2016 at 01:17:01PM +0200, Ville Syrjälä wrote:
> On Mon, Jan 25, 2016 at 09:35:26AM -0700, dann frazier wrote:
> > I've got a Lenovo T410 w/ an external display (DisplayPort<->HDMI). After
> > upgrading from a 4.2 kernel to a 4.3, I started hitting an issue where
> > the display thinks it has lost input for a few moments. Oddly, it
> > usually happens when I start typing in a terminal after a short period
> > of inactivity.
> > 
> > I see no OS-side symptoms - there are no new messages in dmesg/syslog/Xorg
> > log, etc.
> 
> Any fifo underrun reports in dmesg in general?

Yes, several:
  [ 1886.547409] [drm:ironlake_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun

> > I reproduced with latest Linus master (@ 3e1e21c7b), and then
> > bisected down to the following commit:
> > 
> > commit 7221fc333dbe1743a3dff155b03527fda90d4ec1
> > Author: Matt Roper <matthew.d.roper@intel.com>
> > Date:   Thu Sep 24 15:53:08 2015 -0700
> > 
> >     drm/i915: Eliminate usage of pipe_wm_parameters from ILK-style WM (v2)
> 
> That's not in 4.3.

Ah, you're right. I was going by the version in the Makefile at that commit,
which says 4.3.0-rc3. git naiveté.

> As far as currentl Linus tree goes, you may want to try these:
> http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-2-git-send-email-ville.syrjala@linux.intel.com
> http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-1-git-send-email-ville.syrjala@linux.intel.com

Building - I'll test and report back.
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: regression bisected: display sync drops after 7221fc33
  2016-01-26 15:10   ` dann frazier
@ 2016-01-26 16:40     ` dann frazier
  2016-02-02 22:21       ` dann frazier
  0 siblings, 1 reply; 9+ messages in thread
From: dann frazier @ 2016-01-26 16:40 UTC (permalink / raw)
  To: Ville Syrjälä; +Cc: Daniel Vetter, intel-gfx

On Tue, Jan 26, 2016 at 08:10:04AM -0700, dann frazier wrote:
> On Tue, Jan 26, 2016 at 01:17:01PM +0200, Ville Syrjälä wrote:
> > On Mon, Jan 25, 2016 at 09:35:26AM -0700, dann frazier wrote:
> > > I've got a Lenovo T410 w/ an external display (DisplayPort<->HDMI). After
> > > upgrading from a 4.2 kernel to a 4.3, I started hitting an issue where
> > > the display thinks it has lost input for a few moments. Oddly, it
> > > usually happens when I start typing in a terminal after a short period
> > > of inactivity.
> > > 
> > > I see no OS-side symptoms - there are no new messages in dmesg/syslog/Xorg
> > > log, etc.
> > 
> > Any fifo underrun reports in dmesg in general?
> 
> Yes, several:
>   [ 1886.547409] [drm:ironlake_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
> 
> > > I reproduced with latest Linus master (@ 3e1e21c7b), and then
> > > bisected down to the following commit:
> > > 
> > > commit 7221fc333dbe1743a3dff155b03527fda90d4ec1
> > > Author: Matt Roper <matthew.d.roper@intel.com>
> > > Date:   Thu Sep 24 15:53:08 2015 -0700
> > > 
> > >     drm/i915: Eliminate usage of pipe_wm_parameters from ILK-style WM (v2)
> > 
> > That's not in 4.3.
> 
> Ah, you're right. I was going by the version in the Makefile at that commit,
> which says 4.3.0-rc3. git naiveté.
> 
> > As far as currentl Linus tree goes, you may want to try these:
> > http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-2-git-send-email-ville.syrjala@linux.intel.com
> > http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-1-git-send-email-ville.syrjala@linux.intel.com
> 
> Building - I'll test and report back.

fyi, the problem persists with 4.5-rc1 + these 2 patches.

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

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: regression bisected: display sync drops after 7221fc33
  2016-01-26 16:40     ` dann frazier
@ 2016-02-02 22:21       ` dann frazier
  2016-02-02 22:51         ` Matt Roper
  0 siblings, 1 reply; 9+ messages in thread
From: dann frazier @ 2016-02-02 22:21 UTC (permalink / raw)
  To: Ville Syrjälä; +Cc: Daniel Vetter, intel-gfx

On Tue, Jan 26, 2016 at 09:40:27AM -0700, dann frazier wrote:
> On Tue, Jan 26, 2016 at 08:10:04AM -0700, dann frazier wrote:
> > On Tue, Jan 26, 2016 at 01:17:01PM +0200, Ville Syrjälä wrote:
> > > On Mon, Jan 25, 2016 at 09:35:26AM -0700, dann frazier wrote:
> > > > I've got a Lenovo T410 w/ an external display (DisplayPort<->HDMI). After
> > > > upgrading from a 4.2 kernel to a 4.3, I started hitting an issue where
> > > > the display thinks it has lost input for a few moments. Oddly, it
> > > > usually happens when I start typing in a terminal after a short period
> > > > of inactivity.
> > > > 
> > > > I see no OS-side symptoms - there are no new messages in dmesg/syslog/Xorg
> > > > log, etc.
> > > 
> > > Any fifo underrun reports in dmesg in general?
> > 
> > Yes, several:
> >   [ 1886.547409] [drm:ironlake_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
> > 
> > > > I reproduced with latest Linus master (@ 3e1e21c7b), and then
> > > > bisected down to the following commit:
> > > > 
> > > > commit 7221fc333dbe1743a3dff155b03527fda90d4ec1
> > > > Author: Matt Roper <matthew.d.roper@intel.com>
> > > > Date:   Thu Sep 24 15:53:08 2015 -0700
> > > > 
> > > >     drm/i915: Eliminate usage of pipe_wm_parameters from ILK-style WM (v2)
> > > 
> > > That's not in 4.3.
> > 
> > Ah, you're right. I was going by the version in the Makefile at that commit,
> > which says 4.3.0-rc3. git naiveté.
> > 
> > > As far as currentl Linus tree goes, you may want to try these:
> > > http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-2-git-send-email-ville.syrjala@linux.intel.com
> > > http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-1-git-send-email-ville.syrjala@linux.intel.com
> > 
> > Building - I'll test and report back.
> 
> fyi, the problem persists with 4.5-rc1 + these 2 patches.

Hi - Is there any further information I can provide to assist with this?

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

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: regression bisected: display sync drops after 7221fc33
  2016-02-02 22:21       ` dann frazier
@ 2016-02-02 22:51         ` Matt Roper
  2016-02-03  0:35           ` dann frazier
  0 siblings, 1 reply; 9+ messages in thread
From: Matt Roper @ 2016-02-02 22:51 UTC (permalink / raw)
  To: dann frazier; +Cc: Daniel Vetter, intel-gfx

On Tue, Feb 02, 2016 at 03:21:30PM -0700, dann frazier wrote:
> On Tue, Jan 26, 2016 at 09:40:27AM -0700, dann frazier wrote:
> > On Tue, Jan 26, 2016 at 08:10:04AM -0700, dann frazier wrote:
> > > On Tue, Jan 26, 2016 at 01:17:01PM +0200, Ville Syrjälä wrote:
> > > > On Mon, Jan 25, 2016 at 09:35:26AM -0700, dann frazier wrote:
> > > > > I've got a Lenovo T410 w/ an external display (DisplayPort<->HDMI). After
> > > > > upgrading from a 4.2 kernel to a 4.3, I started hitting an issue where
> > > > > the display thinks it has lost input for a few moments. Oddly, it
> > > > > usually happens when I start typing in a terminal after a short period
> > > > > of inactivity.
> > > > > 
> > > > > I see no OS-side symptoms - there are no new messages in dmesg/syslog/Xorg
> > > > > log, etc.
> > > > 
> > > > Any fifo underrun reports in dmesg in general?
> > > 
> > > Yes, several:
> > >   [ 1886.547409] [drm:ironlake_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
> > > 
> > > > > I reproduced with latest Linus master (@ 3e1e21c7b), and then
> > > > > bisected down to the following commit:
> > > > > 
> > > > > commit 7221fc333dbe1743a3dff155b03527fda90d4ec1
> > > > > Author: Matt Roper <matthew.d.roper@intel.com>
> > > > > Date:   Thu Sep 24 15:53:08 2015 -0700
> > > > > 
> > > > >     drm/i915: Eliminate usage of pipe_wm_parameters from ILK-style WM (v2)
> > > > 
> > > > That's not in 4.3.
> > > 
> > > Ah, you're right. I was going by the version in the Makefile at that commit,
> > > which says 4.3.0-rc3. git naiveté.
> > > 
> > > > As far as currentl Linus tree goes, you may want to try these:
> > > > http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-2-git-send-email-ville.syrjala@linux.intel.com
> > > > http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-1-git-send-email-ville.syrjala@linux.intel.com
> > > 
> > > Building - I'll test and report back.
> > 
> > fyi, the problem persists with 4.5-rc1 + these 2 patches.
> 
> Hi - Is there any further information I can provide to assist with this?
> 
>   -dann

Hi Dann.  Could you test with 

http://patchwork.freedesktop.org/patch/72194/

and see if it has any effect on the behavior you see?

Thanks!


Matt


-- 
Matt Roper
Graphics Software Engineer
IoTG Platform Enabling & Development
Intel Corporation
(916) 356-2795
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: regression bisected: display sync drops after 7221fc33
  2016-02-02 22:51         ` Matt Roper
@ 2016-02-03  0:35           ` dann frazier
  2016-02-03  2:04             ` Matt Roper
  0 siblings, 1 reply; 9+ messages in thread
From: dann frazier @ 2016-02-03  0:35 UTC (permalink / raw)
  To: Matt Roper; +Cc: Daniel Vetter, intel-gfx

On Tue, Feb 02, 2016 at 02:51:20PM -0800, Matt Roper wrote:
> On Tue, Feb 02, 2016 at 03:21:30PM -0700, dann frazier wrote:
> > On Tue, Jan 26, 2016 at 09:40:27AM -0700, dann frazier wrote:
> > > On Tue, Jan 26, 2016 at 08:10:04AM -0700, dann frazier wrote:
> > > > On Tue, Jan 26, 2016 at 01:17:01PM +0200, Ville Syrjälä wrote:
> > > > > On Mon, Jan 25, 2016 at 09:35:26AM -0700, dann frazier wrote:
> > > > > > I've got a Lenovo T410 w/ an external display (DisplayPort<->HDMI). After
> > > > > > upgrading from a 4.2 kernel to a 4.3, I started hitting an issue where
> > > > > > the display thinks it has lost input for a few moments. Oddly, it
> > > > > > usually happens when I start typing in a terminal after a short period
> > > > > > of inactivity.
> > > > > > 
> > > > > > I see no OS-side symptoms - there are no new messages in dmesg/syslog/Xorg
> > > > > > log, etc.
> > > > > 
> > > > > Any fifo underrun reports in dmesg in general?
> > > > 
> > > > Yes, several:
> > > >   [ 1886.547409] [drm:ironlake_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
> > > > 
> > > > > > I reproduced with latest Linus master (@ 3e1e21c7b), and then
> > > > > > bisected down to the following commit:
> > > > > > 
> > > > > > commit 7221fc333dbe1743a3dff155b03527fda90d4ec1
> > > > > > Author: Matt Roper <matthew.d.roper@intel.com>
> > > > > > Date:   Thu Sep 24 15:53:08 2015 -0700
> > > > > > 
> > > > > >     drm/i915: Eliminate usage of pipe_wm_parameters from ILK-style WM (v2)
> > > > > 
> > > > > That's not in 4.3.
> > > > 
> > > > Ah, you're right. I was going by the version in the Makefile at that commit,
> > > > which says 4.3.0-rc3. git naiveté.
> > > > 
> > > > > As far as currentl Linus tree goes, you may want to try these:
> > > > > http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-2-git-send-email-ville.syrjala@linux.intel.com
> > > > > http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-1-git-send-email-ville.syrjala@linux.intel.com
> > > > 
> > > > Building - I'll test and report back.
> > > 
> > > fyi, the problem persists with 4.5-rc1 + these 2 patches.
> > 
> > Hi - Is there any further information I can provide to assist with this?
> > 
> >   -dann
> 
> Hi Dann.  Could you test with 
> 
> http://patchwork.freedesktop.org/patch/72194/
> 
> and see if it has any effect on the behavior you see?

Sure - what tree should I apply it to? (Doesn't seem to apply to
4.5-rc2).

  -dann

> Thanks!
> 
> 
> Matt
> 
> 
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: regression bisected: display sync drops after 7221fc33
  2016-02-03  0:35           ` dann frazier
@ 2016-02-03  2:04             ` Matt Roper
  2016-02-04  2:44               ` dann frazier
  0 siblings, 1 reply; 9+ messages in thread
From: Matt Roper @ 2016-02-03  2:04 UTC (permalink / raw)
  To: dann frazier; +Cc: Daniel Vetter, intel-gfx

On Tue, Feb 02, 2016 at 05:35:49PM -0700, dann frazier wrote:
> On Tue, Feb 02, 2016 at 02:51:20PM -0800, Matt Roper wrote:
> > On Tue, Feb 02, 2016 at 03:21:30PM -0700, dann frazier wrote:
> > > On Tue, Jan 26, 2016 at 09:40:27AM -0700, dann frazier wrote:
> > > > On Tue, Jan 26, 2016 at 08:10:04AM -0700, dann frazier wrote:
> > > > > On Tue, Jan 26, 2016 at 01:17:01PM +0200, Ville Syrjälä wrote:
> > > > > > On Mon, Jan 25, 2016 at 09:35:26AM -0700, dann frazier wrote:
> > > > > > > I've got a Lenovo T410 w/ an external display (DisplayPort<->HDMI). After
> > > > > > > upgrading from a 4.2 kernel to a 4.3, I started hitting an issue where
> > > > > > > the display thinks it has lost input for a few moments. Oddly, it
> > > > > > > usually happens when I start typing in a terminal after a short period
> > > > > > > of inactivity.
> > > > > > > 
> > > > > > > I see no OS-side symptoms - there are no new messages in dmesg/syslog/Xorg
> > > > > > > log, etc.
> > > > > > 
> > > > > > Any fifo underrun reports in dmesg in general?
> > > > > 
> > > > > Yes, several:
> > > > >   [ 1886.547409] [drm:ironlake_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
> > > > > 
> > > > > > > I reproduced with latest Linus master (@ 3e1e21c7b), and then
> > > > > > > bisected down to the following commit:
> > > > > > > 
> > > > > > > commit 7221fc333dbe1743a3dff155b03527fda90d4ec1
> > > > > > > Author: Matt Roper <matthew.d.roper@intel.com>
> > > > > > > Date:   Thu Sep 24 15:53:08 2015 -0700
> > > > > > > 
> > > > > > >     drm/i915: Eliminate usage of pipe_wm_parameters from ILK-style WM (v2)
> > > > > > 
> > > > > > That's not in 4.3.
> > > > > 
> > > > > Ah, you're right. I was going by the version in the Makefile at that commit,
> > > > > which says 4.3.0-rc3. git naiveté.
> > > > > 
> > > > > > As far as currentl Linus tree goes, you may want to try these:
> > > > > > http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-2-git-send-email-ville.syrjala@linux.intel.com
> > > > > > http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-1-git-send-email-ville.syrjala@linux.intel.com
> > > > > 
> > > > > Building - I'll test and report back.
> > > > 
> > > > fyi, the problem persists with 4.5-rc1 + these 2 patches.
> > > 
> > > Hi - Is there any further information I can provide to assist with this?
> > > 
> > >   -dann
> > 
> > Hi Dann.  Could you test with 
> > 
> > http://patchwork.freedesktop.org/patch/72194/
> > 
> > and see if it has any effect on the behavior you see?
> 
> Sure - what tree should I apply it to? (Doesn't seem to apply to
> 4.5-rc2).
> 
>   -dann

The patch is written against branch drm-intel-nightly from
git://anongit.freedesktop.org/drm-intel

Once the patch (or an updated version of it based on review feedback)
gets merged to -nightly, it will get cherry-picked into our -fixes
tree as well so that it shows up in an -rc release.


Matt

> 
> > Thanks!
> > 
> > 
> > Matt
> > 
> > 

-- 
Matt Roper
Graphics Software Engineer
IoTG Platform Enabling & Development
Intel Corporation
(916) 356-2795
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/intel-gfx

^ permalink raw reply	[flat|nested] 9+ messages in thread

* Re: regression bisected: display sync drops after 7221fc33
  2016-02-03  2:04             ` Matt Roper
@ 2016-02-04  2:44               ` dann frazier
  0 siblings, 0 replies; 9+ messages in thread
From: dann frazier @ 2016-02-04  2:44 UTC (permalink / raw)
  To: Matt Roper; +Cc: Daniel Vetter, intel-gfx

On Tue, Feb 02, 2016 at 06:04:32PM -0800, Matt Roper wrote:
> On Tue, Feb 02, 2016 at 05:35:49PM -0700, dann frazier wrote:
> > On Tue, Feb 02, 2016 at 02:51:20PM -0800, Matt Roper wrote:
> > > On Tue, Feb 02, 2016 at 03:21:30PM -0700, dann frazier wrote:
> > > > On Tue, Jan 26, 2016 at 09:40:27AM -0700, dann frazier wrote:
> > > > > On Tue, Jan 26, 2016 at 08:10:04AM -0700, dann frazier wrote:
> > > > > > On Tue, Jan 26, 2016 at 01:17:01PM +0200, Ville Syrjälä wrote:
> > > > > > > On Mon, Jan 25, 2016 at 09:35:26AM -0700, dann frazier wrote:
> > > > > > > > I've got a Lenovo T410 w/ an external display (DisplayPort<->HDMI). After
> > > > > > > > upgrading from a 4.2 kernel to a 4.3, I started hitting an issue where
> > > > > > > > the display thinks it has lost input for a few moments. Oddly, it
> > > > > > > > usually happens when I start typing in a terminal after a short period
> > > > > > > > of inactivity.
> > > > > > > > 
> > > > > > > > I see no OS-side symptoms - there are no new messages in dmesg/syslog/Xorg
> > > > > > > > log, etc.
> > > > > > > 
> > > > > > > Any fifo underrun reports in dmesg in general?
> > > > > > 
> > > > > > Yes, several:
> > > > > >   [ 1886.547409] [drm:ironlake_irq_handler [i915]] *ERROR* PCH transcoder A FIFO underrun
> > > > > > 
> > > > > > > > I reproduced with latest Linus master (@ 3e1e21c7b), and then
> > > > > > > > bisected down to the following commit:
> > > > > > > > 
> > > > > > > > commit 7221fc333dbe1743a3dff155b03527fda90d4ec1
> > > > > > > > Author: Matt Roper <matthew.d.roper@intel.com>
> > > > > > > > Date:   Thu Sep 24 15:53:08 2015 -0700
> > > > > > > > 
> > > > > > > >     drm/i915: Eliminate usage of pipe_wm_parameters from ILK-style WM (v2)
> > > > > > > 
> > > > > > > That's not in 4.3.
> > > > > > 
> > > > > > Ah, you're right. I was going by the version in the Makefile at that commit,
> > > > > > which says 4.3.0-rc3. git naiveté.
> > > > > > 
> > > > > > > As far as currentl Linus tree goes, you may want to try these:
> > > > > > > http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-2-git-send-email-ville.syrjala@linux.intel.com
> > > > > > > http://patchwork.freedesktop.org/patch/msgid/1452776015-22076-1-git-send-email-ville.syrjala@linux.intel.com
> > > > > > 
> > > > > > Building - I'll test and report back.
> > > > > 
> > > > > fyi, the problem persists with 4.5-rc1 + these 2 patches.
> > > > 
> > > > Hi - Is there any further information I can provide to assist with this?
> > > > 
> > > >   -dann
> > > 
> > > Hi Dann.  Could you test with 
> > > 
> > > http://patchwork.freedesktop.org/patch/72194/
> > > 
> > > and see if it has any effect on the behavior you see?
> > 
> > Sure - what tree should I apply it to? (Doesn't seem to apply to
> > 4.5-rc2).
> > 
> >   -dann
> 
> The patch is written against branch drm-intel-nightly from
> git://anongit.freedesktop.org/drm-intel
> 
> Once the patch (or an updated version of it based on review feedback)
> gets merged to -nightly, it will get cherry-picked into our -fixes
> tree as well so that it shows up in an -rc release.

I'm not seeing the issue with this fix applied; and reverting just
this fix reintroduces the problem.

Tested-by: dann frazier <dannf@dannf.org>

Thanks!
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^ permalink raw reply	[flat|nested] 9+ messages in thread

end of thread, other threads:[~2016-02-04  2:44 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-01-25 16:35 regression bisected: display sync drops after 7221fc33 dann frazier
2016-01-26 11:17 ` Ville Syrjälä
2016-01-26 15:10   ` dann frazier
2016-01-26 16:40     ` dann frazier
2016-02-02 22:21       ` dann frazier
2016-02-02 22:51         ` Matt Roper
2016-02-03  0:35           ` dann frazier
2016-02-03  2:04             ` Matt Roper
2016-02-04  2:44               ` dann frazier

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