Bug#667459: xserver-xorg-video-radeon: crash on startx

[Elmar Haneke]

> Bonus points if:
> - you can get us a full backtrace. Some hints available at:
> http://x.debian.net/howto/use-gdb.html (even though the one for
> gdm3 won't work anymore).

Switching on KMS did make the problem vanish.

> - you can forward this upstream at bugs.freedesktop.org and let us
> know about the URL for tracking.

https://bugs.freedesktop.org/show_bug.cgi?id=48326

> - you can tell us why you're disable KMS (in modprobe's config).

I did that in 2010, presumably due to an error message regarding KMS.