[Bug 109364] New: switching vsync on and off in vkquake breaks TearFree

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109364

            Bug ID: 109364
           Summary: switching vsync on and off in vkquake breaks TearFree
           Product: xorg
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/AMDgpu
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: tempel.julian at gmail.com
        QA Contact: xorg-team at lists.x.org

Created attachment 143128
  --> https://bugs.freedesktop.org/attachment.cgi?id=143128&action=edit
file needed to reproduce bug

Start vkquake, go into the options and change video settings to native
resolution and fullscreen, if not already the case.
Then quit the game, make sure TearFree is enabled and then start the game
again.
Then turn the game's vsync feature on, apply the change, turn it off again and
also apply this change.
-> TearFree is now disabled or broken (tears quite badly), also after closing
the game.

Get vkquake here:
https://github.com/Novum/vkQuake
You need to put the "id1" folder from the game's shareware version into your
home folder, which can be legally obtained from here (see also description at
the GitHub repo):
bit.ly/2aDMSiz
Since this link is usually or always not reachable, I'll attach the file to
this ticket as encrypted archive (password: "tearfree") and will delete it
later, just in case.

Tested with latest
drm-next-5.1-wip
xf86-video-amdgpu-git 2058c4c4
mesa-git 19.0.0_devel.106811.7bef192018 (radv)

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