Created attachment 49664 [details]
dmesg output showing the lock up
I am using the stock kernel in F15 (currently 220.127.116.11-35.fc15). This crash occurs anytime I try to play the game Cogs (part of "the Humble Indie Bundle 3" ).
To get the game to run, I had to install a library to provide 'S3TC' support (aka GL_EXT_texture_compression_s3tc). Initially, I installed S2TC , but that resulted in a GPU Lockup. I then installed "libtxc_dxtn" from the rpmfusion-free repo, which causes the same GPU lockup.
*** This bug has been marked as a duplicate of bug 39572 ***