Hi! Tested setup is the following: - Mobility Radeon X1700, internal panel 1440x900, the external TFT monitor 1024x768 is connected before startup of the Xorg - recent git master for radeonhd After Xorg startup, the panel is initialized properly and displays login window, the TFT monitor stays black and power indicator is blinking (apparently no signal). I am attaching the full Xorg log to email (compressed as it is unusually large - see below ). Here is the only error message from the radeonhd driver in Xorg log: $grep EE Xorg.0.log | grep -i radeon (EE) RADEONHD(0): D1CRTCDisable: Failed to Unsync CRTC 1 (EE) RADEONHD(0): TMDSAVoltageControl: unhandled chipset: 0x71D5. (EE) RADEONHD(0): TMDSAVoltageControl: unhandled chipset: 0x71D5. rhd_connect output: ========================================= # ./rhd_conntest 01:00.0 rhd_conntest: v0.0.4, git branch master, commit da4783c9 Checking connectors on 0x71D5, 0x1043, 0x1242 (@01:00:00): Load Detection: RHD_OUTPUT_TMDSA HotPlug: RHD_HPD_0 DDC: RHD_DDC_1 LVDS Info: 18bits, dual link, LDI Panel found. Power Timing: 0xF9F, 0x000, 0x03, 0x20, 0x1F4 Macro: 0x0C720407, Clock Pattern: 0x0063 DDC Line[1]: Slaves: 6e a0 ========================================= Also, is it normal that Xorg.0.log is so large? I see e.g. the external monitor seems to be queried many times: ========================== $grep HMDY913757 Xorg.0.log (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 (II) RADEONHD(0): Serial No: HMDY913757 ========================== Best regards, Kirill