Proxmox installation stuck on "Welcome to GRUB!"

[esi_y]

After forcing a reinstallation of GRUB with a Debian 12 LiveCD it booted again,

That's disturbing in the sense that you have to expect same issue upon next kernel update though.

I will continue with the installation with the following steps:
Install the Proxmox VE packages
Install the Proxmox VE packages
apt install proxmox-ve postfix open-iscsi chrony

I'll keep you informed.
Thanks!

Thanks too! I am really interested what could be causing this. And very obviously, it actually is the problem that your original ISO install gave you too.

 

[msh]

@luisgc8 can I ask you for exact steps how you did the "After forcing a reinstallation of GRUB with a Debian 12 LiveCD"?
I have the same issue, but when I booted the live Debian CD, opened console, sudo, and then run `apt install --reinstall grub-efi-amd64` it didn't help.

Thanks,
Mirek

 

[gfngfn256]

after install:
apt install proxmox-default-kernel

and reboot, debian not run and say:
Boot failed.

Have you followed the complete official wiki of installing Proxmox on Debian.

Looking specifically at your boot - I would say you have missed the removing Debian kernel stage:

Remove the Debian Kernel​

Proxmox VE ships its own kernel and keeping the Debian default kernel can lead to trouble on upgrades, for example, with Debian point releases. Therefore, you must remove the default Debian kernel:

apt remove linux-image-amd64 'linux-image-6.1*'

Update and check grub2 config by running:

update-grub

You need to also look at the other sections including Remove the os-prober Package - also see troubleshooting.