[Bug 111541] Cursor sprite sometimes not showed since linux 5.2

[bugzilla-daemon at freedesktop.org]

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

--- Comment #19 from Jonas Ådahl <jadahl at gmail.com> ---
Thanks to being able to reproduce at will, I did some more digging.

  1. Take note of a what gbm_bo successful drmModeSetCursor2() had when showing
a cursor on the GNOME Shell panel
  2. Move cursor to a maximized Firefox window just below the top panel (this
caused drmModeSetCursor2() calls to change to the cursor from a wl_buffer.
  3. Hold down ^T for a while to open a bunch of tabs
  4. Move the cursor back up to the top panel. This triggered a call to
drmModeSetCursor2().

What I could observe is that the same gbm_bo was used in (4) as was in (1), it
had become empty. There were no gbm_bo cursor allocations done in between, nor
any drmModeSetCursor2() calls.

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