[Bug 110984] Vulkan shows stuttering issues on Vega 10 w/ gnome-shell on Wayland

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110984

            Bug ID: 110984
           Summary: Vulkan shows stuttering issues on Vega 10 w/
                    gnome-shell on Wayland
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: lyude at redhat.com

When testing the latest kernel from drm-tip (as of writing, this is
294d5056c1f3 ("drm-tip: 2019y-06m-24d-17h-20m-57s UTC integration manifest") ),
running vulkan-cube on a gnome-shell wayland session (so, since vulkan-cube
doesn't support native wayland this means it's running through Xwayland) shows
pretty significant stuttering issues. See the video here for what it looks
like:

https://people.freedesktop.org/~lyudess/archive/06-24-2019/VID_20190624_140614.mp4

This was reproduced with a Vega 10 Pro SSG:

26:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc.
[AMD/ATI] Vega 10 XT [Radeon PRO SSG] [1002:6862]

Mesa version: 19.0.6-1.fc30
gnome-shell version: 3.32.2-2.fc30
Xwayland version: 1.20.4-3.fc30

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