System crash when streaming with Sunshine or Steam Link.

Hi. This started happening yesterday. After 35 hours of playing Red Dead Redemption 2 exclusively streaming it to the TV with Sunshine, I was 2 hours into another problem-free gaming session when suddenly the image froze, the sound started looping and I could hear the PC fans sounding like a washing machine in the PC room. I SSHd into the PC and ran a shutdown command, which closed the SSH session but didn’t turn off the PC, it was still going crazy loud until I finally held the power button to shut it down.

No hardware or software changes that I can think of, other than ujust update. I set this PC up headless with a dummy HDMI plug and has worked fine until yesterday.

Now, soon after I start streaming even just the desktop, the exact same happens, fans going crazy and everything.

What I tried:
  • Stream a less demanding game (Balatro), same issue.
  • Stream to different clients, same issue.
  • Stream with Steam Remote Play instead, same issue.
  • Run rpm-ostree rollback a couple of times, no luck
  • Connect an actual monitor to the PC and game normally on it, seems to work fine
  • Nuke everything and perform a clean Bazzite install, set Sunshine again from scratch. I then streamed the desktop to the TV and was setting up Steam when the same thing happened.
I'm slightly worried this could be a hardware issue, but what puzzles me is that everything seems to work fine if I game on this PC with a monitor, keyboard and mouse connected.
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