No idea if it was actually working in Bazzite or not.
Tried removing the encryption over SSH, and had to install something else. Garuda Linux doesn’t work very well. So ended up with openSUSE Tumbleweed. SSH failing to start, pissed me off.
I might have done something on my laptop to fix that.
The dock I got does 4k@60Hz anyways.
Just needed to disable the Steam Deck screen, adding video=eDP-1:d to the bootloader.
Otherwise, turning receiver and TV off, turns the Deck’s screen on, not what I want.
Tried editing EDIDs and it just gets an error -2 trying to load it.
The emulator might do 4k@60Hz, if you use limited color, and maybe 8 bit. But I couldn’t get it to work, so I gave up finally.