https://bugs.freedesktop.org/show_bug.cgi?id=28456
--- Comment #2 from Alexandre alexandre.nunes@gmail.com 2010-06-08 19:08:27 PDT --- (In reply to comment #1)
Before someone asks, whether or not KMS is set is irrelevant.
I should have been clearer here. It's irrelevant to the 3-versus-1 quad pipe change. When KMS is not set, flash plugin (e.g. youtube) is much slower (in case of youtube, the video is not smooth, it even stops rendering; in case of games, it's overall slow) considering the 1 quad pipe scenario + KMS and moderately slower than in the 3 pipe scenario + KMS.
Also, My xorg.conf relevant bits:
Section "Device" Identifier "Default Device" Driver "radeon" Option "TVStandard" "ntsc" Option "ColorTiling" "on" Option "EnablePageFlip" "on"
Option "monitor-VGA-0" "VGA-0 Monitor"
EndSection