Screen flicckering due to "drm/amdgpu: enable gfxoff again on raven series"

[Pinky]

No, this does no do anything, the bug is still present.


* Deucher, Alexander <Alexander.Deucher at amd.com> [2019-04-05 17:07:21 +0000]:

>This may be related to stutter mode rather than gfxoff.  If so, there is a fix in the pipeline for that.  Does setting appending amdgpu.ppfeaturemask=0xfffdbfff on the kernel command line fix it?
>
>Alex
>________________________________
>From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> on behalf of Pinky <j-pi at seznam.cz>
>Sent: Friday, April 5, 2019 12:24 PM
>To: amd-gfx at lists.freedesktop.org
>Subject: Screen flicckering due to "drm/amdgpu: enable gfxoff again on raven series"
>
>Hello,
>
>I have today compiled the drm-next kernel from (1) and find out the screen is
>flickering and shows various artifacts. By bissecting I found the cause
>is commit 005440066f929ba0dca8f4e0aebfbf8daac592cc. By reverting it the
>problem went out.
>
>I does not have idea about what to do next. Sorry if this should be posted to
>some bugzilla instead, I have got a bit lost. If so, would You please
>point my out what to do?
>
>With best regards,
>    Pinkava J.
>
>
>lspci (partial)
>
>00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 IOMMU
>00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe Dummy Host Bridge
>06:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Raven Ridge [Radeon Vega Series / Radeon Vega Mobile Series] (rev d1)
>06:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Raven/Raven2/Fenghuang HDMI/DP Audio Controller
>
>
>
>
>(1) git://people.freedesktop.org/~agd5f/linux
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