I have a card which is unknown to radeonhd driver: ATI X1650SE It comes with an Acer ASE700-EQ662A system. The card has 1 D-Sub and 1 DVI connector. I have only one monitor which has both D-Sub and DVI interfaces. If the monitor is connected to D-Sub, the driver works fine. But if the monitor is connected on DVI, the driver reports that it cannot detect monitor and refuse to start x. The Xorg log file is attached. And the result of rhd_conntest is as follows: ./rhd_conntest 1:0:0 rhd_conntest: version 0.0.2, built from git branch master, commit dbb073b8.. Checking connectors on 0x7181, 0x174B, 0x5920 (@01:00:00): Load Detection: RHD_OUTPUT_DACA HotPlug: RHD_HPD_0 DDC: RHD_DDC_0 RHD_DDC_1 DDC Line[0]: Slaves: 6e a0 DDC Line[1]: Slaves: a0 Thank you for the great work. Jie