VM boot device does not exist

[dejieres]

Hello !

I'm facing a problem with a VM that cannot boot since kernel was updated to 6.12.17.

Host : PVE 8.3.5, up to date
Guest : Debian 13 Trixie


I get these error at boot, with kernel 6.12.17 and 6.12.19. I have to revert to kernel 6.12.12 to boot correctly.

Here is the configuration for this VM :

I tried to change several settings (CPU, Video, Machine type, disk controller) but the result is always the same.

Any clue of what could possibly be wrong ?

Maybe it's more a Debian bug, not directly related to Proxmox, but I really don't know where to start to solve this...

 

[dejieres]

Well, I kept on searching, and finally found the culprit...

I originally chose VirtIO IOMMU for the emulated IOMMU, that's seems broken with the latest kernels. Using now Intel vIOMMU at the place, and the VM boot again perfectly with the latest kernel (6.12.19)