From Fedora Project Wiki

rendercheck 1.4
Render extension version 0.11
Window format: r8g8b8
Found server-supported format: a8
Found server-supported format: a8r8g8b8
Found server-supported format: x8r8g8b8
Ignoring server-supported format: b8g8r8a8
Ignoring server-supported format: b8g8r8x8
Ignoring server-supported format: r8g8b8
Ignoring server-supported format: b8g8r8
Ignoring server-supported format: r5g5b5
Ignoring server-supported format: b5g5r5
Ignoring server-supported format: x1r5g5b5
Ignoring server-supported format: x1b5g5r5
Ignoring server-supported format: r5g6b5
Ignoring server-supported format: b5g6r5
Ignoring server-supported format: x8b8g8r8
Ignoring server-supported format: x2r10g10b10
Ignoring server-supported format: x2b10g10r10
Beginning testing of filling of 1x1R pictures
Beginning testing of filling of 10x10 pictures
Beginning dest coords test
Beginning src coords test
Beginning mask coords test
Beginning transformed src coords test
Beginning transformed src coords test 2
Beginning transformed mask coords test
Beginning transformed mask coords test 2
Beginning blend test on a8
Beginning blend test on a8r8g8b8
Beginning blend test on x8r8g8b8
Beginning blend test on r8g8b8 window
Beginning composite mask test on a8
Beginning composite mask test on a8r8g8b8
Beginning composite mask test on x8r8g8b8
Beginning composite mask test on r8g8b8 window
46 tests passed of 46 total