Still seems to happen for me on Gutsy; (and I've updated my machine to latest BIOS as well to fix another issue).
For this test I ran running google-earth for a while seemed OK,
Then I ran planet penguin racer, got a lock in the racer, couldn't
gdb or strace the process; -9 killed it, X left in odd resoluiton
Restarted X, looks OK - but all GL apps
(glxgears, gltron etc) all just hang on startup.
I did a physical reset of the machine and it worked again - glxgears worked,
managed a few seconds in 'torcs' (racing game).
Still seems to happen for me on Gutsy; (and I've updated my machine to latest BIOS as well to fix another issue).
For this test I ran running google-earth for a while seemed OK,
Then I ran planet penguin racer, got a lock in the racer, couldn't
gdb or strace the process; -9 killed it, X left in odd resoluiton
Restarted X, looks OK - but all GL apps
(glxgears, gltron etc) all just hang on startup.
I did a physical reset of the machine and it worked again - glxgears worked,
managed a few seconds in 'torcs' (racing game).
Dave