Comment 33 for bug 992982

I have solved this problem for Canon MX860 networked printer.

Clues came from a report of a similar problem with Arch linux and from the cups error_log file.

During upgrade to 12.04, a key library was deleted. In my case it was libpopt.so.0.0.0. From my working Mint 12 installation I copied both the 64-bit version (in /lib) and the 32-bit version (in /lib32) to these folders on a sick 12.04 machine as root. I then created symbolic links to these files. That is:

sudo cp /path to 64-bit source copy/libpopt.so.0.0.0 /lib/libpopt.so.0.0.0
cd /lib
sudo ln -s libpopt.so.0.0.0 libpopt.so.0

sudo cp /path to 32-bit source copy/libpopt.so.0.0.0 /lib32/libpopt.so.0.0.0
cd /lib32
sudo ln -s libpopt.so.0.0.0 libpopt.so.0

I restarted cups with:
sudo restart cups

Finally, I completely removed then reinstalled the printer driver packages. In my case the packages were:

cnijfilter-common_3.10-1_amd64.deb
cnijfilter-mx860series_3.10-1_amd64.deb