update-grub-legacy-ec2 does not consider 3.5.0-generic as valid for Xen

[Marcin Juszkiewicz]

I use Ubuntu 12.04 in Xen. Boot is done with pygrub so I use grub-legacy-ec2 to generate list of kernels for booting. But with 3.5.0-21-generic I do not get it on a list:

Konfigurowanie linux-image-3.5.0-21-generic (3.5.0-21.32~precise1) ...
Running depmod.
update-initramfs: deferring update (hook will be called later)
Examining /etc/kernel/postinst.d.
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.5.0-21-generic /boot/vmlinuz-3.5.0-21-generic
update-initramfs: Generating /boot/initrd.img-3.5.0-21-generic
run-parts: executing /etc/kernel/postinst.d/pm-utils 3.5.0-21-generic /boot/vmlinuz-3.5.0-21-generic
run-parts: executing /etc/kernel/postinst.d/x-grub-legacy-ec2 3.5.0-21-generic /boot/vmlinuz-3.5.0-21-generic
Searching for GRUB installation directory ... found: /boot/grub
Searching for default file ... found: /boot/grub/default
Testing for an existing GRUB menu.lst file ... found: /boot/grub/menu.lst
Searching for splash image ... none found, skipping ...
Ignoring non-Xen Kernel on Xen domU host: vmlinuz-3.5.0-21-generic
Found kernel: /boot/vmlinuz-3.2.0-35-virtual
Found kernel: /boot/vmlinuz-3.2.0-34-virtual
Found kernel: /boot/vmlinuz-3.2.0-33-virtual
Found kernel: /boot/vmlinuz-3.2.0-32-virtual
Found kernel: /boot/vmlinuz-3.2.0-31-virtual
Found kernel: /boot/vmlinuz-3.2.0-30-virtual
Updating /boot/grub/menu.lst ... done

run-parts: executing /etc/kernel/postinst.d/zz-update-grub 3.5.0-21-generic /boot/vmlinuz-3.5.0-21-generic
Generating grub.cfg ...
cat: /boot/grub/video.lst: Nie ma takiego pliku ani katalogu
/usr/sbin/grub-probe: warn: disk does not exist, so falling back to partition device /dev/xvda1.
/usr/sbin/grub-probe: warn: disk does not exist, so falling back to partition device /dev/xvda1.
/usr/sbin/grub-probe: warn: disk does not exist, so falling back to partition device /dev/xvda1.
/usr/sbin/grub-probe: warn: disk does not exist, so falling back to partition device /dev/xvda1.
/usr/sbin/grub-probe: warn: disk does not exist, so falling back to partition device /dev/xvda1.
Found linux image: /boot/vmlinuz-3.5.0-21-generic
Found initrd image: /boot/initrd.img-3.5.0-21-generic
/usr/sbin/grub-probe: warn: disk does not exist, so falling back to partition device /dev/xvda1.
/usr/sbin/grub-probe: warn: disk does not exist, so falling back to partition device /dev/xvda1.
/usr/sbin/grub-probe: warn: disk does not exist, so falling back to partition device /dev/xvda1.
/usr/sbin/grub-probe: warn: disk does not exist, so falling back to partition device /dev/xvda1.
Found linux image: /boot/vmlinuz-3.2.0-35-virtual
Found initrd image: /boot/initrd.img-3.2.0-35-virtual
Found linux image: /boot/vmlinuz-3.2.0-34-virtual
Found initrd image: /boot/initrd.img-3.2.0-34-virtual
Found linux image: /boot/vmlinuz-3.2.0-33-virtual
Found initrd image: /boot/initrd.img-3.2.0-33-virtual
Found linux image: /boot/vmlinuz-3.2.0-32-virtual
Found initrd image: /boot/initrd.img-3.2.0-32-virtual
Found linux image: /boot/vmlinuz-3.2.0-31-virtual
Found initrd image: /boot/initrd.img-3.2.0-31-virtual
Found linux image: /boot/vmlinuz-3.2.0-30-virtual
Found initrd image: /boot/initrd.img-3.2.0-30-virtual
/usr/sbin/grub-probe: warn: disk does not exist, so falling back to partition device /dev/xvda1.
done
Konfigurowanie linux-image-generic-lts-quantal (3.5.0.21.28) ...

"Ignoring non-Xen Kernel on Xen domU host: vmlinuz-3.5.0-21-generic" is a key...