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a4d8a64c4b
If using the X server internal XRANDR 1.0 interface, it seems we must register a display size with RRRegisterSize() in order to make RRGetInfo() call RRScanOldConfig() to generate an output and crtc for us. Without this, the following GDM bug means that an XDMCP session to GDM cannot be started. https://bugzilla.gnome.org/show_bug.cgi?id=736054 Instead, use the more recent XRANDR 1.2 internal interface to explicitly create the output and crtc, and maintain a single mode which represents the current display size. Also don't emit a RRScreenSizeNotify when a RRScreenSizeSize is done which has no effect, this seems to throw the GDM greeter into a loop... v2: Maintain reference count for the mode we maintain more correctly, to avoid double free causing a crash on shutdown Connect crtc to output, so a subsequent RRSetCrtcConfig request doesn't change anything, so we don't fail due to our lack of rrSetConfig or rrCrtcSet hooks. See https://cygwin.com/ml/cygwin-xfree/2015-02/msg00032.html v3: Raise limit on X display size from 4Kx4K to 32Kx32K Signed-off-by: Jon Turney <jon.turney@dronecode.org.uk> Reviewed-by: Colin Harrison <colin.harrison@virgin.net>
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