Same - had exactly this problem. I’m not exactly sure if I found a real fix in the end, it just eventually inexplicably started working. Think I tried changing ram slots and having to change some options in the bios - might be worth trying there as a start!
I’ve been using it for the last week and really enjoy it - I’m on an m1 air and asahi is so much snappier than macOS, which is saying something because it still sings!
There’s a few key hardware features still missing - mic, speaker, and the thunderbolt port (so hdmi and external displays) that are preventing me from driving it fully because I do a lot of presentations at work, but it’s quick enough to boot into mac when I need to.
Occasionally there’s something that doesn’t want to run on arm architecture, but there’s usually an alternative - and it sounds like 4k paging is close.
Give it a shot! I’m invested cos I wanna hear more people’s take on it 😅