I have an AMDGPU machine - a hateful HP laptop with a Vega 6 chipset - and the display regularly goes garbled when I switch VTs. I too am looking for a way to “reset the graphics card” and cat /sys/kernel/debug/dri/N/amdgpu_gpu_recover ain’t it: it resets it alright, but after that you get a frozen image and X is dead.

Maybe Wayland survives that but Xorg definitely doesn’t.

The only reliable graphics card reset solution I’ve every found was to close then reopen the laptop to force the machine to go to sleep, then wake up and go through the restart rigmarole cleanly. I wish there was a way to do that sleep-wakeup routing with a keyboard shortcut, but I haven’t found one.

I think the real solution is to buy a decent replacement laptop though.

Hmm I have AMD but I’m getting No such file or directory

I think on some distros this is disabled by default. I have forgotten how you can re-enable it.