Hi didier, Thanks for prompt reply.
I installed Debian Buster with UEFI boot on my ThinkPad P52 successfully without any boot problem. I think it is related to Xen HVM + OVMF. Anyone has an idea what went wrong ? Thanks. John Mok On Wed, Feb 24, 2021, 16:50 didier gaumet <didier.gau...@gmail.com> wrote: > > I have never used Xen but I use Qemu/KVM via virtmanager on a Debian 10 > host. I have installed several UEFI (OVMF) booting guest OSes, > including Debian with no particular problem. > > The problem of your Debian guest not booting could be caused by the > Debian installer not being run in UEFI mode, the media upon Debian is to > be installed being not GPT type, the mandatory EFI partition being > absent, the GRUB bootloader being not installed or incorrectly set-up, > and so on... > > Debian installation guide (UEFI and general): > https://www.debian.org/releases/stable/amd64/ch03s06.en.html#UEFI > https://www.debian.org/releases/stable/amd64/index.en.html > > There is an OVMF page on the Xen wiki, detailing setup and troubleshooting: > https://wiki.xenproject.org/wiki/OVMF > >