Demi Marie Obenour <demiobenour@gmail.com> writes:

> KDE Linux has already done this.  It works around a long-running bug in
> the AMD GPU driver, which I believe also affects my test laptop.
> Without the workaround, the system freezes and does not recover until a
> hard reboot.

You tested this on your test laptop and it solved the problem?  Did you
manually work around the card0/card1 bug?  Do the proposed upstream
patches also solve the problem?