Mario, do you really have 1.5.3-0ubuntu2~ppa3 on your system? Run the commands
apt-cache policy cups
and post the output here. Note that older CUPS packages do not have an "ipp14" backend.
Can you post the output of these two commands:
ls /usr/lib/cups/backend/ ls /usr/lib/cups/backend-available/ lpinfo -v
Mario, do you really have 1.5.3-0ubuntu2~ppa3 on your system? Run the commands
apt-cache policy cups
and post the output here. Note that older CUPS packages do not have an "ipp14" backend.
Can you post the output of these two commands:
ls /usr/lib/ cups/backend/ cups/backend- available/
ls /usr/lib/
lpinfo -v