I have uploaded a new CUPS version with additional fixes to my PPA (cups 1.5.2-9ubuntu1.1~ppa3). Please update your system with my PPA (comment #14) still active and then test again. Does this improve the situation or even solve the problem? Do not forget to remove the blacklisting of the usblp module and to turn off and turn on the printer.
I have uploaded a new CUPS version with additional fixes to my PPA (cups 1.5.2-9ubuntu1. 1~ppa3) . Please update your system with my PPA (comment #14) still active and then test again. Does this improve the situation or even solve the problem? Do not forget to remove the blacklisting of the usblp module and to turn off and turn on the printer.