It seems US Robotics has fixed the problem in the latest firmwares. After updating my USR805464 to Firmware Version 4.150.10.15.3 I can print now without problems.
Also, for my USR9108A I found in the release notes for BETA Version 1.8 one point: Printing issues with operating systems using Cups 1.2.x and 1.3.x -- Problem printing to IPP printer https://bugs.launchpad.net/bugs/57822 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs