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When using secondary GPU outputs the primary GPU's blockhandler will copy changes from its framebuffer to a pixmap shared with the secondary GPU. In reverse prime setups the secondary GPU's blockhandler will do another copy from the shared pixmap to its own framebuffer. Before this commit, if the primary GPU's blockhandler would run after the secondary GPU's blockhandler and no events were pending, then the secondary GPU's blockhandler would not run until some events came in (WaitForSomething() would block in the poll call), resulting in the secondary GPU output sometimes showing stale contents (e.g. a just closed window) for easily up to 10 seconds. This commit fixes this by setting the timeout passed into the blockhandler to 0 if any shared pixmaps were updated by the primary GPU, forcing an immediate re-run of all blockhandlers. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Dave Airlie <airlied@redhat.com>
X Server
The X server accepts requests from client applications to create windows,
which are (normally rectangular) "virtual screens" that the client program
can draw into.
Windows are then composed on the actual screen by the X server
(or by a separate composite manager) as directed by the window manager,
which usually communicates with the user via graphical controls such as buttons
and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the
following article:
http://en.wikipedia.org/wiki/X_server
All questions regarding this software should be directed at the
Xorg mailing list:
http://lists.freedesktop.org/mailman/listinfo/xorg
Please submit bug reports to the Xorg bugzilla:
https://bugs.freedesktop.org/enter_bug.cgi?product=xorg
The master development code repository can be found at:
git://anongit.freedesktop.org/git/xorg/xserver
http://cgit.freedesktop.org/xorg/xserver
For patch submission instructions, see:
http://www.x.org/wiki/Development/Documentation/SubmittingPatches
For more information on the git code manager, see:
http://wiki.x.org/wiki/GitPage