[Bug 108020] Screen artifacting with 4.18+ kernels on AMD Radeon Vega 64 & 1440p 120hz+ monitors

[Bug 108020] Screen artifacting with 4.18+ kernels on AMD Radeon Vega 64 & 1440p 120hz+ monitors

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https://bugs.freedesktop.org/show_bug.cgi?id=108020

            Bug ID: 108020
           Summary: Screen artifacting with 4.18+ kernels on AMD Radeon
                    Vega 64 & 1440p 120hz+ monitors
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: mokurai82@gmail.com

I'm experiencing some interlacing on the right side of the screen of my 1440p
144hz monitor when using 4.18+ kernels and setting the monitor to 120+ hz It
works fine with 100hz and lower, or older kernels, which seems to indicate some
displayport bandwidth issue/regression. This happens regardless of the distro
or mesa version. I'm using an RX Vega 64 with the opensource driver.

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[Bug 108020] Screen artifacting with 4.18+ kernels on AMD Radeon Vega 64 & 1440p 120hz+ monitors

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https://bugs.freedesktop.org/show_bug.cgi?id=108020

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |harry.wentland@amd.com,
                   |                            |nicholas.kazlauskas@amd.com
                   |                            |, sunpeng.li@amd.com

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
Please attach the dmesg output.

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[Bug 108020] Screen artifacting with 4.18+ kernels on AMD Radeon Vega 64 & 1440p 120hz+ monitors

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https://bugs.freedesktop.org/show_bug.cgi?id=108020

--- Comment #2 from Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> ---
This is likely fixed. It may be worth testing the amd-staging-drm-next kernel
from:

https://cgit.freedesktop.org/~agd5f/linux/

or applying the proposed patch from the bug report at:

https://bugzilla.kernel.org/show_bug.cgi?id=201067

Please let me know if you're seeing an issue with either of these.

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[Bug 108020] Screen artifacting with 4.18+ kernels on AMD Radeon Vega 64 & 1440p 120hz+ monitors

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https://bugs.freedesktop.org/show_bug.cgi?id=108020

--- Comment #3 from Arek Tumas <mokurai82@gmail.com> ---
Created attachment 141710
  --> https://bugs.freedesktop.org/attachment.cgi?id=141710&action=edit
dmesg

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[Bug 108020] Screen artifacting with 4.18+ kernels on AMD Radeon Vega 64 & 1440p 120hz+ monitors

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https://bugs.freedesktop.org/show_bug.cgi?id=108020

--- Comment #4 from Arek Tumas <mokurai82@gmail.com> ---
Yes it is probably the same bug. It's a right-most vertical interlaced line.
I'm currently experiencing this bug in the newest ubuntu mainline kernel
(4.19-rc5). [It's not an issue on 4.18.8 kernel] I'm relatively inexperienced,
Applying kernel patches seems a little difficult for me. I only know how to
install mainline kernels from ukuu or .deb files. I can try if someone links me
clear instructions. Thank You for Your time and help. I hope this will be fixed
in future Linux kernel versions.

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[Bug 108020] Screen artifacting with 4.18+ kernels on AMD Radeon Vega 64 & 1440p 120hz+ monitors

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https://bugs.freedesktop.org/show_bug.cgi?id=108020

Martin Peres <martin.peres@free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |MOVED

--- Comment #5 from Martin Peres <martin.peres@free.fr> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/537.

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