Hi, I got similar issue with PowerMac G4 Cube, and I solved it by writing /etc/X11/xorg.conf manually. I don't know why it doesn't determine refresh rate automatically as well as PC...
Anyway, xorg.conf file is below. Probably you don't need 1280x1024 resolutions, so commented it out. I hope it will help. Section "Monitor" Identifier "LCD" HorizSync 30-65 VertRefresh 50-75 Modeline "1024x768" 64.11 1024 1080 1184 1344 768 769 772 795 -HSync +Vsync # Modeline "1280x1024" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync EndSection Section "Screen" Identifier "Default Screen" SubSection "Display" # Modes "1280x1024" Modes "1024x768" EndSubSection Monitor "LCD" EndSection -- To UNSUBSCRIBE, email to debian-powerpc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20100925171343.6eae9d46.henr...@debian.or.jp