Parsec Client/VM is stuck at 1024x768 resolution with Easy-GPU-PV

 TL;DR

Download USBMMIDD v2 and create a task in Task Scheduler to solve the resolution problem.

startup.ps1
C:\usbmmidd_v2\deviceinstaller64 enableidd 1

In the Task Scheduler create a task that:

• Run whether user is logged or not
• Run with the highest privileges
• Run at startup
• Deactivate the conditions
• Has the following action configuration:
  Action: Start a program
  Program/script: powershell.exe
  Add arguments: -NoExit -ExecutionPolicy Bypass C:\usbmmidd_v2\startup.ps1
  

P.S.: Edit the paths to match your system.

P.S².: Don't forget to deactivate all others monitors in the Windows Display Settings (show only on X).

via https://github.com/jamesstringerparsec/Easy-GPU-PV/issues/190

Thanks to https://github.com/jamesstringerparsec/Easy-GPU-PV