crash on shutdown from kde

[jonas]

Hallo,

I'm using feisty and whenever i try to shutdown from within kde the
system hangs (switching to console is not possible, numpad key is not
working). I had a similar behaviour with edgy but I had a workaround
back then. I used to logout from kde to kdm and shutdown from kdm.
This does not work anymore because a logout results in a black screen
now. But i can switch to console so it's not a complete crash like the
one i have with shutdown.

Anyone has an idea how I could track down the reason for the bug?

It's somehow related to the ati driver, since it looks like its
working with the fglrx driver. But I would like to avoid using the
closed source driver.

tia
Jonas