The default enabled HDMI audio support is unfortunately unstable. It can break audio on the system completely, hang applications trying to use audio and break restart and shutdown.
We will update the kernel and install images as soon as possible (within 24 hours) with disabled HDMI audio.
In the meantime HDMI audio can be disabled by adding apple_dcp.noaudio to the kernel command line:
sudo grubby --update-kernel=ALL --args="apple_dcp.noaudio"
Additional known bugs:
- generating the initramfs can take several minutes. The last printed line is "dracut[I]: *** Including module: drm ***‘’’
- HDMI displays are possibly be only refreshed at half of their refresh rate
- Bluetooth LE on WiFi 6E devices (bcm4388) is broken in
kernel-16k-6.8.9-402.asahi - after initial installation or upgrade to f40 the speaker volume is at 100% (and KDE plays a sound at login)
- depending on the fractional scale factor KDE Plasma might show single pixel lines/rows of background
- after changing the fractional scale factor systray panels might not show correctly (fixed by logging out and back in)
- picture breaks after changing the Color Profile in KDE Display settings, fixed by a complete redraw (change virtual desktop, Press Power than esc)
- with active Color Profile and Blur desktop effect taskbar, logout/shutdown dialog and panels might show as solid black which stays even after closing the panel. (Virtual desktop switch fixes it, workaround either unset Color Profiile or disable the Blur effect)