Further info. In text mode at boot, and in graphics mode for the ubuntu splash screen, both the vga and dvi outputs work. After the boot process is complete, with both vga and dvi outputs connected to the MK241H monitor, and using the monitor to switch between inputs, the vga input works normally and the dvi input remains blank. Data at this stage: xrandr -q Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 1920 x 1920 TV_7PIN_DIN disconnected VGA_1 connected 1920x1200+0+0 518mm x 324mm 1920x1200 59.9*+ 59.9 1600x1200 60.0 59.9 1680x1050 69.9 59.9 60.0 1400x1050 70.0 60.0 1280x1024 75.0 59.9 60.0 1440x900 60.0 59.9 1280x960 60.0 59.9 1360x768 59.8 1360x765 59.8 1152x864 75.0 75.0 74.9 70.0 60.0 1024x768 75.1 75.0 70.1 60.0 832x624 74.6 800x600 72.2 75.0 60.3 56.2 640x480 75.0 72.8 72.8 75.0 60.0 59.9 720x400 70.1 DVI-I_1/digital connected 1920x1200+0+0 518mm x 324mm 1920x1200 60.0*+ 1600x1200 60.0 59.9 1680x1050 59.9 60.0 1400x1050 70.0 60.0 1280x1024 75.0 59.9 60.0 1440x900 60.0 59.9 1280x960 60.0 59.9 1360x768 59.8 1360x765 59.8 1152x864 75.0 75.0 74.9 70.0 60.0 1024x768 75.1 75.0 70.1 60.0 832x624 74.6 800x600 72.2 75.0 60.3 56.2 640x480 75.0 72.8 72.8 75.0 60.0 59.9 720x400 70.1 DVI-I_1/analog disconnected rhd_conntest -s 01:00.0 rhd_conntest: v1.2.4, non-git sources Checking connectors on 0x95C5, 0x1787, 0x2000 (@01:00:00): Load Detection: RHD_OUTPUT_DACB HotPlug: RHD_HPD_0 DDC: RHD_DDC_0 RHD_DDC_1 DDC Line[0]: Slaves: 6e 74 a0 DDC Line[1]: Slaves: 6e a0 Does anyone have any further suggestions as to what I might try? -- To unsubscribe, e-mail: radeonhd+unsubscribe@opensuse.org For additional commands, e-mail: radeonhd+help@opensuse.org