Install Linux VM on Proxmox 9.1.1 - keeps booting from ISO

vavida52

New Member
Feb 25, 2026
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Hello,

I am trying to successfully install Xubuntu/Ubuntu on a Linux VM in Proxmox 9.1.1 (freshly installed).

Problem is that everytime I install Xubuntu or Ubuntu on the VM it boots from the ISO even if I remove the ISO after installation (when it says to remove the ISO and press enter).

I tried many VM Configs as:

Machine q35+OVMF BIOS+SCSI Disk Bus
Machine i440+SeaBIOS+SATA Disk Bus
etc.
I also tried to install GRUB after installation and change the boot order (disable CD/DVD Drive option and unmounted the ISO).

Nothing works...If i execute lsblk -f then I see the FSTYPE squash 4.0. This seems to indicate that the OS loaded from ISO and not from Disk.


I ran out of ideas what I could do that the OS boots from disk. I tried installation with ubuntu 24.04 and Xubuntu 25.10 but the issue is always the same.

I appreciate any help. Thanks.