Comment 10 for bug 1250611

@Stéphane, still not upgrading properly even with 12.04.2:

The following packages will be upgraded:
   shim-signed (1.5~12.04.1+0.4-0ubuntu4 => 1.5~12.04.2+0.4-0ubuntu4)
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
Need to get 0 B/434 kB of archives.
After this operation, 0 B of additional disk space will be used.
Do you want to continue [Y/n]?
Setting up shim-signed (1.5~12.04.1+0.4-0ubuntu4) ...
Unrecognized option `--target=x86_64-efi'
Usage: grub-install [OPTION] [install_device]
Install GRUB on your drive.

  -h, --help print this message and exit
  -v, --version print the version information and exit
  --modules=MODULES pre-load specified modules MODULES
  --boot-directory=DIR install GRUB images under the directory DIR/grub
                          instead of the /boot/grub directory
  --grub-setup=FILE use FILE as grub-setup
  --grub-mkimage=FILE use FILE as grub-mkimage
  --grub-mkrelpath=FILE use FILE as grub-mkrelpath
  --grub-mkdevicemap=FILE use FILE as grub-mkdevicemap
  --grub-probe=FILE use FILE as grub-probe
  --no-floppy do not probe any floppy drive
  --allow-floppy Make the drive also bootable as floppy
                          (default for fdX devices). May break on some BIOSes.
  --recheck probe a device map even if it already exists
  --force install even if problems are detected
   --removable the installation device is removable
   --bootloader-id=ID the ID of bootloader.
   --uefi-secure-boot install an image usable with UEFI Secure Boot
                           (only available if the grub-efi-amd64-signed
                           package is installed)
   --no-uefi-secure-boot do not install an image usable with UEFI Secure
                           Boot, even if the system was currently started
                           using it

INSTALL_DEVICE can be a GRUB device name or a system device filename.

grub-install copies GRUB images into /boot/grub, and uses grub-setup
to install grub into the boot sector.

Report bugs to <email address hidden>.
dpkg: error processing shim-signed (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 shim-signed
E: Sub-process /usr/bin/dpkg returned an error code (1)

This seems to be because it tries to finish the installation of the 12.04.1 version