It started flickering again. Will stopping the X server and running "rmmod amdgpu" and then "modprobe amdgpu" fix it?
Maybe just restarting the X server will.
Wouldn't recommend running "echo 0 > /sys/class/vtconsole/vtcon1/bind", you need a shell script to unload the module after doing that, and then reload it. I had to reboot after running that, by holding the power button down, no video if you run that.
#!/usr/bin/bash systemctl stop lightdm echo 0 > /sys/class/vtconsole/vtcon1/bind rmmod amdgpu modprobe amdgpu systemctl start lightdm
That might work. Script works, but don't know if that'll fix the flickering without rebooting. Don't run it in a terminal in X, it'll stop lightdm, killing the script.