GTX 4080: second monitor freezes

Hello @generix and @j22gim
I have similar problems, and I’ve posted them here.
I did:

  1. In software&updates, switch to the nouveau driver. No rebooting.
  2. Downloaded the 535 driver and made it executable (chmod +x)
  3. run the runfile installer for 535.113.01 with option -b. No rebooting.
  4. run the runfile installer for 535.113.01 with option --uninstall. No rebooting.

Now I have the problem that software&updates will not let me check any other driver to install:


Any thoughts?