Hi carsten, In boot menu, you can select prompt and type: userconf disable hdaudio boot
To try without hdaudio. I believe it's also possible to try with "drvctl -d hdaudio0", but unsure. I'd guess some of your issues (whether they are this one or not) are from radeon not attaching properly and hdaudio might be radeon's HDMI port...? ...And maybe we're not handling multiple graphics cards correctly.
