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when I boot ubuntu-20.04-legacy-server-amd64.iso on Proxmox 6.1 (uses KVM/QEMU hypervisor) with BIOS=OVMF (UEFI) I get corrupted video after select "Install Ubuntu Server" on Grub.

When I boot ubuntu-20.04-live-server-amd64.iso - the display works - but I really don't like the new installer (partiion manager still lacks advanced partitioning and others).

I know to edit the boot line on grub (press e) and boot the modified entry (ctrl + x) - but adding vga=792 and/or video=vesafb:off,efifb:off to the linux command line, doesn't helps (same problem).

It looks like something is corrupt - than entering the Grub Shell with F2 and call videoinfo just freeze grub with no resulting output.

I know - someone will ask me, why EFI and why legacy image?! But I don't want discuss this - I just try to broaden my horizons :)

Has someone the right params to add to the linux command line or a other working solution?

corrupted boot screen

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Ok, after testing around with different kernel options - I found the solution:

I changed the VM video hardware to VirtIO-GPU.

Now the ISO boots without modification of the kernel command line.

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  • Brilliant: I had to add "-vga vmware" to my kvm line. This is on Debian Bookworm, running a virtual machine based on Debian Trixie. You saved me (more) hours of searching.
    – Russ
    Mar 29 at 16:27

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