chris@pcunten ~ % xrandr Screen 0: minimum 320 x 200, current 1280 x 1024, maximum 4096 x 4096 VGA-2 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 338mm x 270mm 1280x1024 60.02*+ 75.02 1152x864 75.00 1024x768 75.08 75.03 60.00 832x624 74.55 800x600 75.00 60.32 640x480 75.00 60.00 720x400 70.08 chris@pcunten ~ % xrandr --listproviders Providers: number : 2 Provider 0: id: 0xd2 cap: 0x7, Source Output, Sink Output, Source Offload crtcs: 2 outputs: 1 associated providers: 0 name:nouveau Provider 1: id: 0x53 cap: 0xf, Source Output, Sink Output, Source Offload, Sink Offload crtcs: 2 outputs: 2 associated providers: 0 name:radeon chris@pcunten ~ % xrandr --setprovideroutputsource radeon nouveau chris@pcunten ~ % xrandr --output VGA-2 --auto --output DVI-1-0 --right-of VGA-2 --mode 1280x1024 chris@pcunten ~ % xrandr Screen 0: minimum 320 x 200, current 2560 x 1024, maximum 4096 x 4096 VGA-2 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 338mm x 270mm 1280x1024 60.02*+ 75.02 1152x864 75.00 1024x768 75.08 75.03 60.00 832x624 74.55 800x600 75.00 60.32 640x480 75.00 60.00 720x400 70.08 VGA-1-0 disconnected (normal left inverted right x axis y axis) DVI-1-0 connected 1280x1024+1280+0 (normal left inverted right x axis y axis) 598mm x 336mm 1920x1080 60.00 + 1280x1024 60.02* 1440x900 59.90 1280x800 59.91 1152x864 75.00 1024x768 70.07 60.00 800x600 60.32 56.25 640x480 66.67 60.00 720x400 70.08 1280x1024 (0x55) 108.000MHz +HSync +VSync h: width 1280 start 1328 end 1440 total 1688 skew 0 clock 63.98KHz v: height 1024 start 1025 end 1028 total 1066 clock 60.02Hz 1152x864 (0x58) 108.000MHz +HSync +VSync h: width 1152 start 1216 end 1344 total 1600 skew 0 clock 67.50KHz v: height 864 start 865 end 868 total 900 clock 75.00Hz 1024x768 (0x5a) 65.000MHz -HSync -VSync h: width 1024 start 1048 end 1184 total 1344 skew 0 clock 48.36KHz v: height 768 start 771 end 777 total 806 clock 60.00Hz 800x600 (0x5b) 40.000MHz +HSync +VSync h: width 800 start 840 end 968 total 1056 skew 0 clock 37.88KHz v: height 600 start 601 end 605 total 628 clock 60.32Hz 640x480 (0x5e) 25.200MHz -HSync -VSync h: width 640 start 656 end 752 total 800 skew 0 clock 31.50KHz v: height 480 start 490 end 492 total 525 clock 60.00Hz 720x400 (0x5f) 28.320MHz -HSync +VSync h: width 720 start 738 end 846 total 900 skew 0 clock 31.47KHz v: height 400 start 412 end 414 total 449 clock 70.08Hz chris@pcunten ~ %