[Bug 107053] Flicker/tearing on MacBook Pro 11.5 Ubuntu 18.04

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107053

Michel Dänzer <michel at daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         QA Contact|                            |xorg-team at lists.x.org
            Product|DRI                         |xorg
           Assignee|dri-devel at lists.freedesktop |xorg-team at lists.x.org
                   |.org                        |
            Version|unspecified                 |git
          Component|DRM/Radeon                  |Server/Ext/DRI

--- Comment #3 from Michel Dänzer <michel at daenzer.net> ---
>From the Xorg log file:

[   158.424] (WW) RADEON(0): flip queue failed: Device or resource busy
[   158.424] (WW) RADEON(0): Page flip failed: Device or resource busy
[   158.424] (EE) RADEON(0): present flip failed

This looks like a page flip is attempted while another one is still pending.
Unfortunately, handling that better turns out to be a surprisingly tricky
problem, but I think the best place would be xserver/present/present_scmd.c,
delaying the page flip until the previous one has completed.

Meanwhile, if you can try a GNOME on Wayland session, that might work better.

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