dmesg is full of "radeon 0000:01:00.0: XXXXXXXX reserve failed for wait"
If I try to switch users, I get a black screen, sometimes with random artifacts on the screen. I can use Ctrl-Alt-FX to switch to VTs. I think I got back to a sane state by switching back to the original logged in user and logging out, then the login screen for the user I was trying to switch to was displayed and I was able to login. So, login/logout works fine, but only for a single user at a time. I can't have multiple users logged in at the same time.
Disabling the fancy graphical interface elements does not help.
Please let me know if I can provide any more information.
This also affects me on 10.10 Maverick (up-to-date).
01:00.0 VGA compatible controller: ATI Technologies Inc RV370 5B60 [Radeon X300 (PCIE)]
01:00.1 Display controller: ATI Technologies Inc RV370 [Radeon X300SE]
dmesg is full of "radeon 0000:01:00.0: XXXXXXXX reserve failed for wait"
If I try to switch users, I get a black screen, sometimes with random artifacts on the screen. I can use Ctrl-Alt-FX to switch to VTs. I think I got back to a sane state by switching back to the original logged in user and logging out, then the login screen for the user I was trying to switch to was displayed and I was able to login. So, login/logout works fine, but only for a single user at a time. I can't have multiple users logged in at the same time.
Disabling the fancy graphical interface elements does not help.
Please let me know if I can provide any more information.