[Bug 111541] New: Cursor sprite not showed since linux 5.2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111541

            Bug ID: 111541
           Summary: Cursor sprite not showed since linux 5.2
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: not set
          Priority: not set
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: jadahl at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Since upgrading from 5.1 to 5.2, the cursor sprite set via (non-atomic) KMS is
not properly shown on screen sometimes when running mutter/GNOME Shell on top
of KMS. It happens somewhat randomly and fairly seldom (personally only once),
with no clear way of how to reproduce, but often enough to get regular bug
reports. It somewhat feels like a race condition somewhere.

E.g.
https://bugzilla.redhat.com/show_bug.cgi?id=1738614 (contains drm.debug log)
https://gitlab.gnome.org/GNOME/gnome-shell/issues/1165

In all cases, downgrading to 5.1 makes the issue go away. If it's not a kernel
bug/regression, any hints on what could cause it?

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