update-initramfs: Generating /boot/initrd.img-2.6.31-19-generic : RESUME=/dev/sda2 is not a valid kernel version update-initramfs: failed for /boot/initrd.img-2.6.31-19-generic Failed to create initrd image.
update-initramfs: Generating /boot/initrd. img-2.6. 31-19-generic img-2.6. 31-19-generic
: RESUME=/dev/sda2 is not a valid kernel version
update-initramfs: failed for /boot/initrd.
Failed to create initrd image.