Screen turns off again after waking from sleep mode

Found a solution:

  1. Downgrade the Kernel to 5.10
  • in grub press “e” to edit the boot options, find the line that says something like:
linux   /boot/vmlinuz-4.0.0-1-amd64 root=UUID=5e285652 ro  quiet
  • add a “3” after the quiet, so that you get something like the following:
linux   /boot/vmlinuz-4.0.0-1-amd64 root=UUID=5e285652 ro  quiet 3
  • boot and log in and type:
sudo mhwd-kernel -i linux510
  1. Install Nvidia driver using mhwd
sudo mhwd -a pci nonfree 0300

Hope that works for you too!