Same problem here (Phenom II 920, Gigabyte MA770-UD3, Sapphire Radeon HD 4670 Ultimate), but updating the mainboard bios didn't help. Changing from DVI to VGA output did help. DVI works with Karmic (xserver-video- ati 6.12.2).
** Changed in: xserver-xorg-video-ati (Ubuntu) Status: Fix Released => Confirmed -- radeon 4670 black screen https://bugs.launchpad.net/bugs/363547 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs