Comment 30 for bug 118605

I am also experiencing this issue in the Kubuntu Hardy Beta on my Dell D610 since I switched to the fglrx driver; the ati driver seems to work without issue. This machine has used the fglrx driver fine under Ubuntu Edgy, Feisty, Gutsy, and Hardy Beta. IThe problem is only present with the Kubuntu install, not with vanilla Ubuntu.

The initial description matches my machine's symptoms perfectly. Any session ending action (log out, restart, shut down--but not "start new session") causes a blank screen and unresponsive input. Ctrl-alt-backspace does not restart the X session and ctrl-alt-F1 does not switch to a terminal. The machine will remain like that indefinitely. But interestingly, I have found that pressing the power button DOES instigate an apparently normal shutdown procedure, even once all other input has frozen. My machine has no other problems with the fglrx driver.