Environment:
--------------
kernel: 2.6.19-rc3
Xserver: randr-1.2-for-server-1.2
Xf86_video_intel: modesetting branch, cset: 4cdcaac26b3f425ec8fcc2fd3eaa9bfb7a137422

Details
--------------
Rendercheck (1.1)'s test case "component" report several failures if EXA is
enabled: 
-----------------------------------------------------------
Clear composite mask test on a8r8g8b8:
Clear composite mask test on r8g8b8:
Clear composite mask test on r8g8b8 window:
Src composite mask test on a8r8g8b8:
Src composite mask test on r8g8b8:
Src composite mask test on r8g8b8 window:
Over composite mask test on a8r8g8b8:
Over composite mask test on r8g8b8:
Over composite mask test on r8g8b8 window:
In composite mask test on a8r8g8b8:
In composite mask test on r8g8b8:
In composite mask test on r8g8b8 window:
Out composite mask test on a8r8g8b8:
Out composite mask test on r8g8b8:
Out composite mask test on r8g8b8 window:
OutReverse composite mask test on a8r8g8b8:
OutReverse composite mask test on r8g8b8:
OutReverse composite mask test on r8g8b8 window:
Atop composite mask test on a8r8g8b8:
Atop composite mask test on r8g8b8:
Atop composite mask test on r8g8b8 window:
Xor composite mask test on a8r8g8b8:
Xor composite mask test on r8g8b8:
Xor composite mask test on r8g8b8 window:
Add composite mask test on a8r8g8b8:
Add composite mask test on r8g8b8:
Add composite mask test on r8g8b8 window:
DisjointClear composite mask test on a8r8g8b8:
DisjointClear composite mask test on r8g8b8:
DisjointClear composite mask test on r8g8b8 window:
DisjointSrc composite mask test on a8r8g8b8:
DisjointSrc composite mask test on r8g8b8:
DisjointSrc composite mask test on r8g8b8 window:
ConjointClear composite mask test on a8r8g8b8:
ConjointClear composite mask test on r8g8b8:
ConjointClear composite mask test on r8g8b8 window:
ConjointSrc composite mask test on a8r8g8b8:
ConjointSrc composite mask test on r8g8b8:
ConjointSrc composite mask test on r8g8b8 window:
-----------------------------------------------------------


Reproduction steps
--------
. bring up X
. ./rendercheck -t composite


Misc
--------
If XAA is enabled instead of EXA, these failures don't happen.