~$ sudo apt-get purge linux-image-extra-3.19.0-22-generic
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
  linux-image-extra-3.19.0-22-generic*
0 upgraded, 0 newly installed, 1 to remove and 19 not upgraded.
2 not fully installed or removed.
After this operation, 161 MB disk space will be freed.
Do you want to continue? [Y/n] y
(Reading database ... 459038 files and directories currently installed.)
Removing linux-image-extra-3.19.0-22-generic (3.19.0-22.22) ...
run-parts: executing /etc/kernel/postinst.d/apt-auto-removal 3.19.0-22-generic /boot/vmlinuz-3.19.0-22-generic
run-parts: executing /etc/kernel/postinst.d/dkms 3.19.0-22-generic /boot/vmlinuz-3.19.0-22-generic
run-parts: executing /etc/kernel/postinst.d/initramfs-tools 3.19.0-22-generic /boot/vmlinuz-3.19.0-22-generic
update-initramfs: Generating /boot/initrd.img-3.19.0-22-generic
run-parts: executing /etc/kernel/postinst.d/pm-utils 3.19.0-22-generic /boot/vmlinuz-3.19.0-22-generic
run-parts: executing /etc/kernel/postinst.d/unattended-upgrades 3.19.0-22-generic /boot/vmlinuz-3.19.0-22-generic
run-parts: executing /etc/kernel/postinst.d/update-notifier 3.19.0-22-generic /boot/vmlinuz-3.19.0-22-generic
run-parts: executing /etc/kernel/postinst.d/zz-update-grub 3.19.0-22-generic /boot/vmlinuz-3.19.0-22-generic
Generating grub configuration file ...
ERROR: cannot determine partition label for rootfs /dev/sda9
run-parts: /etc/kernel/postinst.d/zz-update-grub exited with return code 1
dpkg: error processing package linux-image-extra-3.19.0-22-generic (--purge):
 subprocess installed post-removal script returned error exit status 1
Errors were encountered while processing:
 linux-image-extra-3.19.0-22-generic
E: Sub-process /usr/bin/dpkg returned an error code (1)