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* [REGRESSION] drm/amd/dc: Add dc display driver (v2)
@ 2018-04-30 15:14 Joseph Salisbury
  2018-04-30 15:40 ` Harry Wentland
  0 siblings, 1 reply; 2+ messages in thread
From: Joseph Salisbury @ 2018-04-30 15:14 UTC (permalink / raw)
  To: harry.wentland
  Cc: alexander.deucher, alexander.deucher, christian.koenig,
	David1.Zhou, airlied, amd-gfx, dri-devel, linux-kernel, 1761751

Hi Harry,

A kernel bug report was opened against Ubuntu [0].  After a kernel
bisect, it was found the following commit introduced the bug:


commit 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c
Author: Harry Wentland <harry.wentland@amd.com>
Date:   Tue Sep 12 15:58:20 2017 -0400

    drm/amd/dc: Add dc display driver (v2)


The regression was introduced as of v4.15-rc1 and still exists in
current mainline.  The commit does not need to be reverted to resolve
the bug.  Disabling the CONFIG_DRM_AMD_DC_PRE_VEGA option makes the bug
go away.
   
I was hoping to get your feedback, since you are the patch author.  Do
you think gathering any additional data will help diagnose this issue?
   

Thanks,

Joe


[0] http://pad.lv/1761751

^ permalink raw reply	[flat|nested] 2+ messages in thread
* Re: [REGRESSION] drm/amd/dc: Add dc display driver (v2)
  2018-04-30 15:14 [REGRESSION] drm/amd/dc: Add dc display driver (v2) Joseph Salisbury
@ 2018-04-30 15:40 ` Harry Wentland
  0 siblings, 0 replies; 2+ messages in thread
From: Harry Wentland @ 2018-04-30 15:40 UTC (permalink / raw)
  To: Joseph Salisbury
  Cc: alexander.deucher, christian.koenig, David1.Zhou, airlied,
	amd-gfx, dri-devel, linux-kernel, 1761751

Replied on the ticket.

If this is about non-functioning LVDS or VGA I'm aware of it and trying to find time to find a good solution.

Harry

On 2018-04-30 11:14 AM, Joseph Salisbury wrote:
> Hi Harry,
>
> A kernel bug report was opened against Ubuntu [0].  After a kernel
> bisect, it was found the following commit introduced the bug:
>
>
> commit 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c
> Author: Harry Wentland <harry.wentland@amd.com>
> Date:   Tue Sep 12 15:58:20 2017 -0400
>
>     drm/amd/dc: Add dc display driver (v2)
>
>
> The regression was introduced as of v4.15-rc1 and still exists in
> current mainline.  The commit does not need to be reverted to resolve
> the bug.  Disabling the CONFIG_DRM_AMD_DC_PRE_VEGA option makes the bug
> go away.
>    
> I was hoping to get your feedback, since you are the patch author.  Do
> you think gathering any additional data will help diagnose this issue?
>    
>
> Thanks,
>
> Joe
>
>
> [0] http://pad.lv/1761751
>

^ permalink raw reply	[flat|nested] 2+ messages in thread
end of thread, other threads:[~2018-04-30 15:40 UTC | newest]

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2018-04-30 15:14 [REGRESSION] drm/amd/dc: Add dc display driver (v2) Joseph Salisbury
2018-04-30 15:40 ` Harry Wentland

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