Comment 18 for bug 1755912

The bisect is done and this is the result:

5bd5c27c7d284d01477c5cc022ce22438c46bf9f is the first new commit
commit 5bd5c27c7d284d01477c5cc022ce22438c46bf9f
Author: Gerd Hoffmann <email address hidden>
Date: Fri Apr 27 13:55:28 2018 +0200

    qxl: fix local renderer crash

    Make sure we only ask the spice local renderer for display updates in
    case we have a valid primary surface. Without that spice is confused
    and throws errors in case a display update request (triggered by
    screendump for example) happens in parallel to a mode switch and hits
    the race window where the old primary surface is gone and the new isn't
    establisted yet.

    Cc: <email address hidden>
    Fixes: https://bugzilla.redhat.com//show_bug.cgi?id=1567733
    Signed-off-by: Gerd Hoffmann <email address hidden>
    Reviewed-by: Marc-André Lureau <email address hidden>
    Message-id: <email address hidden>

:040000 040000 ed86f864314483660b3c2abe045361ae7c98a5dc f0d55b3e98dd0864d6686fba052d83ae5545d007 M hw