Slow 2D with radeon KMS

[Damien Mir]

>> However I see 2 performance issues :
>> - glxgears tops at 1450fps (compared to ~2500fps without KMS)
>> - GL vsync is broken, ie visual tearing especially at playing large
>> videos
>> (XV or OGL) with Kwin compositing enabled
>
> GL vsync got broken with the DRI2 swap buffers merge:
> http://bugs.freedesktop.org/show_bug.cgi?id=26240
>

Just tried xorg-server 1.7.99, is it supposed to be broken also with the
new 1.8 branch ?