Suspend works and everything? I've ditched ubuntu due to stuff like snapd and installed debian instead. It seems whenever the GPU gets put into low power mode (suspend) it gets into an invalid state that not even a reboot can resolve. I have to power down, wait, and then turn the laptop back on.

I'm sure I messed something up when I installed everything and probably added a workaround that isn't meant for my driver version (systemd/persistenced scripts)

Similar setup with the XPS 17" model and Ubuntu. Might try Debian somewhere in here.