68283a77c6
Many Intel GPUs can't switch between sync and async flips willy nilly. Sometimes that change itself will take one extra frame. This means that constant ping-pong between sync and async flips is only going to cause problems. Stay in async flip mode as long as the client is requesting it. The present protocol spec does say: "If 'options' contains PresentOptionAsync, and the 'target-msc' is less than or equal to the current msc for 'window', then the operation will be performed as soon as possible, not necessarily waiting for the next vertical blank interval." So there is an expectation that a future target-msc will still be respected even when PresentOptionAsync is specified. Staying in async flip mode won't actually change that given that present_scmd_pixmap() takes the flip mode into account when calculating exec_msc. So visually the flip should still happen on the correct target_msc regardles of whether we executed it as sync or async. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> |
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| xserver.ent.in | ||
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: https://en.wikipedia.org/wiki/X_server
All questions regarding this software should be directed at the Xorg mailing list:
https://lists.freedesktop.org/mailman/listinfo/xorg
The primary development code repository can be found at:
https://gitlab.freedesktop.org/xorg/xserver
For patch submission instructions, see:
https://www.x.org/wiki/Development/Documentation/SubmittingPatches
As with other projects hosted on freedesktop.org, X.Org follows its Code of Conduct, based on the Contributor Covenant. Please conduct yourself in a respectful and civilized manner when using the above mailing lists, bug trackers, etc: