Hello, Last night I thought the bug may have come again, so I decided to use another way to shutdown. I think switching to tty1 then login as root and shutdown will tell me what's wrong maybe, so I pressed Ctrl-Alt-F1 --- and the system hangs. So it failed to switch to tty1 and hung, now looks like a display issue. I use latest kernel from [core], have a ATI Mobility Radeon 5650 and Intel Core i5 (1st gen) switchable graphics (MUXed) operated with vgaswitcheroo. I use xf86-video-{ati,intel} along with dependencies from [extra], all up-to-date. Also is xorg. Can you give me some extra hints on debugging? -- Carl Lei (XeCycle) Department of Physics, Shanghai Jiao Tong University OpenPGP public key: 7795E591 Fingerprint: 1FB6 7F1F D45D F681 C845 27F7 8D71 8EC4 7795 E591