Bug#932085: grub-common: Grub can't load initrd for Xen after upgrade to Buster

[Colin Watson]

On Sun, Jul 14, 2019 at 01:27:23PM -0700, Slava Kryvel wrote:
> After upgrade from Debian 9.9 to Debian 10 I have got unbootable system.
> 
> I'm using Xen hypervisor, which was also upgraded from 4.8 to 4.11
> during OS upgrade.
> UEFI is enabled.
> 
> After upgrade was finished, I was unable to boot again to Xen kernel.
> But normal Debian kernel was still bootable.

Were there any specific error messages when trying to boot Xen?

> I have found a workaround to fix my issue - remove option --nounzip from
> initrd loading line in grub configuration file /etc/grub.d/20_linux_xen
> 
> - module2 --nounzip /boot/initrd.img-4.19.0-5-amd64
> + module2 /boot/initrd.img-4.19.0-5-amd64
> 
> I'm not sure there is issue in config, maybe I did something wrong.
> So in this case please explain what is correct behavior ?

I'm using Xen and things seem to work fine for me (without removing
--nounzip); my Xen system doesn't use UEFI, though.

I'm CCing a few folks who've contributed to GRUB's Xen support in one
way or another in the recent past; hopefully at least one of them can
help here?

Thanks,

-- 
Colin Watson                                       [cjwatson at debian.org]