From: Stephen Anthony <stephena@roadrunner.nf.net>
Subject: [SDL] First patch concerning  4.3 and refresh rates

OK, here's my first draft of the patch for the above subject.

A short explanation:

X 4.3 introduces many more modelines than older versions.  This would be
fine, except it introduces many modes with the *same* resolution but
different refresh rates.  And SDL won't necessarily pick the one with the
highest refresh rate.

So this patch restores SDL to X 4.2 functionality.  That is, there is only
ever one refresh rate *per* resolution, and it is the highest possible.
This functionality can be totally disabled by using the environment
variable 'SDL_VIDEO_X11_USE_ALL_MODES' set equal to 1.

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40615