Comment 2 for bug 498517

Thank you for taking the time to report this bug and help to improve Ubuntu.

The upgrade log shows this error:

Beállítás: linux-image-2.6.31-16-generic (2.6.31-16.53) ...
Running depmod.
update-initramfs: Generating /boot/initrd.img-2.6.31-16-generic
Not updating initrd symbolic links since we are being updated/reinstalled
(2.6.31-16.52 was configured last, according to dpkg)
Not updating image symbolic links since we are being updated/reinstalled
(2.6.31-16.52 was configured last, according to dpkg)
Running postinst hook script /sbin/update-grub.
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 ...
expr: nem numerikus argumentum
User postinst hook script [/sbin/update-grub] exited with value 2
dpkg: hibás feldolgozás: linux-image-2.6.31-16-generic (--configure):
 installed post-installation script alfolyamat 2 hibakóddal kilépett

This is bug #193439; marking as a duplicate.