Black screen via oculink

I'm running Bazzite on a GPD Win MAX 2 (2024) with a RX 7900 XT on a Minisforum DEG1 attached via Oculink.
On Windows 11 the GPU is working as expected, so the hardware itself should be fine. However, when I boot into Bazzite, I only see the bootup screen. Afterwards there is no video signal. I saw that someone else already had a similar issue (egpu oculink issue), but unfortunately the solution proposed there does not seem to work in this case.
I can open a console with Ctrl+Alt+F3, and I can run export-gpu, but no matter which one I choose (and then reboot), the result is the same.

What other options do I have here?
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