It's just me at home on a day off. 6.8.8-zabbly+ won't boot because it lacks ZFS and Ubuntu-6.8.0-31 does not come with amdgpu(?).
I tried the Ubuntu 24.04 installer (with kernel 6.8.0-31) and it also crashed the GPU when amdgpu is loaded automatically. So my issue is an upstream kernel 6.8 or Ubuntu issue.
I could try a nested Proxmox (without ZFS) and GPU passthrough to test further, but it looks like Ubuntu kernel 6.8 is just an unlucky choice (at the moment).
Please carefully read.
- 6.8.8-zabbly+ is a Debian 12 only thing (I always made clear statements about this!)
- zabbly on his Github account sends you to a page, where a ZFS 6.8.8 version is available
However
- zabbly & friends are no (!) pve kernel replacement
- I introdudced them just to show that 6.8.4 and 6.8.8 are > not < broken.
- By testing all sorts of combos, I can proove it's a pve kernel thing.
Don't waste time with zabbly / friends on pve. It's the pve delta / kernel flags that have issues (that is my hypothesis at this point).