Hi all,
About a month ago, I got a decent deal on an XFX Mercury Radeon RX 7900 XT. While everything works fine once booted, getting there can be tricky.
Sometimes on boot, the GPU shuts off - fans stop, lights go out, and there’s no video output. The rest of the system appears unaffected. If I plug an HDMI cable into the motherboard (i.e., integrated graphics), I get output, can enter my LUKS password, and boot normally. At that point, the GPU powers on and functions like nothing happened. I then switch my monitor to DisplayPort and continue as usual.
Initially, this only happened occasionally, but it’s now a regular issue. I’ve left the HDMI cable permanently connected just to deal with it.
I’m running the latest available kernel (currently 6.14.4-300.fc42.x86_64), hoping for improvements, but no luck so far. I also have to manually run sudo grubby --set-default-index=0 after each update to boot into the latest kernel, but that’s probably an unrelated user error 
Is there anything I can do to resolve this, aside from waiting on better driver support?
Here is the output of fpaste and journalctl, in case it helps: Fedora 42 debug info ($4839378) · Snippets · GitLab
Let me know if I can share more information!