Qubes 4.2 rc3 sys-gui-gpu: communicating with dom0

[tempmail]

This is what I did, but it needs specific environment.

[Workaround] How to use external monitor in NVidia Optimus mode

For dual Intel/Nvidia GPU notebooks, as I understand it’s not possible to use external monitor/TV while in Nvidia Optimus mode because HDMI/DP ports are directly tied to Nvidia card. So we are doomed to Discrete mode, meanning using only Nvidia card which is very bad for the battery, or… Here I discovered that I can create sys-gui(-gpu) and attach only Nvidia card to it in Optimus mode even without hiding it from the dom0 and sys-gui-gpu is passed to external monitor, while using iGPU on the la…