I'm in with Maverick Kubuntu, latest fglrx drivers and x.org from x-swat repository and Plymouth working via framebuffer. Looks like X server just fails to start. (from system logs there's one line about it with no reason) Bug appears just in one of 3-5 boots. Pressing on power button and the system is turning off correctly (at least Plymouth indicates halt process). Going to turn plymouth off and check if this help.
I'm in with Maverick Kubuntu, latest fglrx drivers and x.org from x-swat repository and Plymouth working via framebuffer. Looks like X server just fails to start. (from system logs there's one line about it with no reason) Bug appears just in one of 3-5 boots. Pressing on power button and the system is turning off correctly (at least Plymouth indicates halt process). Going to turn plymouth off and check if this help.