Can't shutdown Ultramarine (Fedora) on CAVE Asus C302

Hi - I’ve used the MrChromebox technique to successfully replace Chrome OS with Ultramarine Linux on My old Asus C302 (CAVE) and it seems to run fine (apart from the audio thing I’m working on). What it won’t do is shutdown - it hangs on the system logo and sticks there until i force shutdown by holding the power button. Anyone have any suggestions on what to do ?
Linux Kernal 6.8.11 and OS Ultramarine Linux 40 (XFCE Edition)