[SOLVED] Ubuntu VM EFI boot problem

[Nikolay]

Hello,

Few days ago we have decided to migrate our VMs from Hyper-V to proxmox. Everything gone fine, except 2 VM with Hyper-V generation 2 system. They dont want to boot from disk and drop to UEFI boot bios, then i select Boot From File and vm start.


Any solutions for this problem?

 

[fireon]

Hello,

what is when you change to normal bios and write grub once again with an liveiso?
https://help.ubuntu.com/community/Grub2
https://wiki.ubuntuusers.de/GRUB_2/

 

[Nikolay]

Grub2 cannot be writen to GPT disk. I `ve tried to reinstall grub-uefi with no luck.

Boot with standart bios stucked at Boot from Hard Disk...

 

[Nikolay]

It`s seems like there is only one solution - move VM to another MBR disk...

 

[fireon]

It`s seems like there is only one solution - move VM to another MBR disk...

Yes think too. You must change from UEFI boot to normal MBR.

 

[Nikolay]

Solution that works for me:


1) attach new empty disk to VM
2) boot from live cd
3) create mbr partitions at new disk with fdisk
4) mount root partition from old and new disks
5) make 2 previous steps for as many partitions as you have
6) rsync data from old partitions to new
7) edit fstab
8) grub-install --root-directory=/mnt(choose yours) /dev/sdX
9) reboot and it`s done.

 

[fireon]

Solution that works for me:


1) attach new empty disk to VM
2) boot from live cd
3) create mbr partitions at new disk with fdisk
4) mount root partition from old and new disks
5) make 2 previous steps for as many partitions as you have
6) rsync data from old partitions to new
7) edit fstab
8) grub-install --root-directory=/mnt(choose yours) /dev/sdX
9) reboot and it`s done.

Fine, thank you for your instructions

 

[GuiltyNL]

For future readers, please try this first, It can save you alot of time:

https://forum.proxmox.com/threads/h...imported-from-a-gen2-vm-hyper-v-source.45070/