/usr/sbin/grub-probe: error: disk `lvmid/********' not found.

[icountu]

use a livecd, https://pve.proxmox.com/wiki/Recover_From_Grub_Failure
then change pve-root size，like

lvextend -L +1g /dev/pve/root
resize2fs /dev/pve/root
update-grub

and reboot

Finally Worked thank you

 

[Vince-0]

ran into this today, grub-update was finding possible bootable files in lxc containers. I killed the running grub process from another terminal and the upgrade continued.