Description of problem: PC has two GPUs: 01:05.0 Display controller: ATI Technologies Inc RS690 [Radeon X1200 Series] 02:00.0 VGA compatible controller: ATI Technologies Inc RV630 [Radeon HD 2600 Series] * When running without a xorg.conf, the monitor connected to the discrete RV630 card runs normally . The monitor connected to the RS690 IGP is set to wrong refresh rates and will go into standby eventually * When runnning with a (generated) xorg.conf the RV630 monitor just blanks(backlight on, all dark) when starting X. A switch back to a VT is possible. Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: [[0. enable SurroundView]] 1. Xorg -configure 2. startx 3. Actual results: up to one working screen Expected results: 2 working monitors joined to one desktop Additional info: see dmesg: vgaarb: this pci device is not a vga device [drm:drm_mode_getfb] *ERROR* invalid framebuffer id
Created attachment 417051 [details] Xorg.0.log ; no xorg.conf
Created attachment 417052 [details] Xorg.0.log+xorg.conf
Created attachment 417053 [details] drm debug output from dmesg
Created attachment 417054 [details] dmesg | egrep -v wlan0\|disconnecting
You can't do that, you can only have 1 Xserver per GPU and xinerama is not supported with randr1.2 thus you can't reunite the 2 Xserver to have one desktop. Only thing you can do is 1 desktop on each GPU (then matter is how to switch keyboard/mouse btw the 2 Xserver).