[SOLVED] missing OS after grub update during proxmox installation

[namen991]

Hello, I installed proxmox 8.3.2 on Debian 12 following these steps https://pve.proxmox.com/wiki/Install_Proxmox_VE_on_Debian_12_Bookworm. I have a pc with windows 11 and debian 12 and I had a grub config where I could select windows or debian. Now, after installing proxmox and removing the debian kernel, I updated the grub config as stated, but now the grub menu doesn't show the windows installation, only proxmox

lsblk command now show this:

nvme0n1 259:0 0 476.9G 0 disk
├─nvme0n1p1 259:1 0 260M 0 part /boot/efi
├─nvme0n1p2 259:2 0 16M 0 part
├─nvme0n1p3 259:3 0 117.9G 0 part
├─nvme0n1p4 259:4 0 1.1G 0 part
├─nvme0n1p5 259:5 0 260M 0 part
├─nvme0n1p6 259:6 0 15.3G 0 part [SWAP]
├─nvme0n1p7 259:7 0 119.2G 0 part /
└─nvme0n1p8 259:8 0 223G 0 part /data

Partitions nvme0n1p2 to nvme0n1p5 are window partitions (nvme0n1p3 has the windows OS and the others came configured with the pc).. previous lsblk command showed something related to windows on those partitions. How can I fix grub so I can choose between windows and proxmox? what could happen If I reinstall the grub (following these steps https://www.simplified.guide/linux/recover-lost-grub)?

 

[aabraham]

Did you regenerate the GRUB config? (grub-mkconfig -o /boot/grub/grub.cfg)

 

[Mr.Doubt]

I would not recomend a dualboot with Proxmox.
You may change the line GRUB_DISABLE_OS_PROBER=true in /etc/default/grub.d/proxmox-ve.cfg to false und run update-grub

 

[cave]

don't dualboot a server. the recommendation is to get rid of os-prober.

 

[namen991]

I would not recomend a dualboot with Proxmox.
You may change the line GRUB_DISABLE_OS_PROBER=true in /etc/default/grub.d/proxmox-ve.cfg to false und run update-grub

thanks Mr.Doubt.. that solved the issue