Comment 108 for bug 1872001

Just an FYI for those trying to figure out what the heck is going on.

The fix related to this thread wasn't in 5.3.0-51.44.
From the changelog, which is hard to find, the fix was committed in 5.3.0-52.46 which is currently in eoan-proposed:

5.3.0-46-generic - i915 - frequent GPU hangs / resets rcs0 (LP: #1872001)
    - drm/i915/execlists: Preempt-to-busy
    - drm/i915/gt: Detect if we miss WaIdleLiteRestore
    - drm/i915/execlists: Always force a context reload when rewinding RING_TAIL

It is not recommended to run proposed kernels for production systems but it is possible to add them to systems which would otherwise be broken (like mine right now) using this repository:
https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/proposed

I had hoped since that also contained a bunch of audio fixes it might have fixed my inability to play sound but I haven't solved that one yet. I still have yet to see a hang on 5.3.0-52.46 either but again video playback with sound and heavy office document work seemed to trigger hangs for me so with no sound I could just be avoiding the problem...