[radeonhd] 0x9588:0x0000:0x0000: Palit HD2600XT Sonic PCIe

This PCIe card "Palit HD2600XT Sonic" is not producing any output on my Sony XBR LCD monitor via its internal HDMI connector. The device has three physical connectors: HDMI, DDVI, VGA. BIOS displays on the HDMI port as well as the Ubuntu Hardy console. When I load X the display goes back and the VT console cannot be restored. Thank you for your time! -J (II) RADEONHD(0): Unknown card detected: 0x9588:0x0000:0x0000. If - and only if - your card does not work or does not work optimally please contact radeonhd@opensuse.org to help rectify this. Use the subject: 0x9588:0x0000:0x0000: <name of board>.