Issues with Multiple GPUs?

[apparatus]

@AWhite

How to set up the GPU Passthrough properly so that Qubes doesn’t load the main GPU but uses the secondary.

GPU Passthrough -> lightdm.service won't start

no: Both GPU correctly plugged in their respective PCI slots Only connect 1 cable, from the primary GPU to the primary screen That way you physically ensure that if you have something on your screen then it come from the primary GPU. Should be easier to debug that way

GPU Passthrough -> lightdm.service won't start

I was able to pass through my GPU without even hiding it using boot parameters by just configuring the correct GPU to boot Xorg on. Since I’m using my iGPU for Qubes, the config file is this: vim /etc/X11/xorg.conf.d/20-intel.conf Section "Device" Identifier "Intel Graphics" Driver "Intel" Option "DRI" "3" EndSection I think this might fix your situation. If it doesn’t work, you can simply just delete the 20-intel.conf file you created and go back to normal.

@AWhite

How to get the panels back?

xfce4-Panel doesn't appear after booting

This was the solution for me. To clarify: Go to System Tools > Session and Startup > Application Autostart > Add+ Name: Start taskbar Command: xfce4-panel Trigger: on login Reboot the machine and taskbar appears automatically again with all the icons including network icon which did not appear when I manually started the taskbar later on.