https://bugs.freedesktop.org/show_bug.cgi?id=71516
--- Comment #11 from Elven Decker sailing@together.net --- X won't start without LIBGL_ALWAYS_SOFTWARE set. Log file is Xort.0.log.sav above.
I notice that Xorg.0.log and lspci identify my card in different ways? Radeon 9600 vs. 9550?
From Xorg.0.log
(--) RADEON(0): Chipset: "ATI Radeon 9600 AS (AGP)" (ChipID = 0x4153)
lspci -nn | grep VGA 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] RV350 [Radeon 9550] [1002:4153]
***
Another thought...
Not sure anybody needs to run Xorg -configure anymore, but I tried it to see if I could learn anything and got the message "Number of created screens does not match number of detected devices". The configure process noted three screens and three monitors, I believe my card supports my monitor and an external TV.