Printing

This feature is experimental in version 0.15.

Known limitations and caveats:

• the protocol and implementation may still change. See ticket #598.
• forwarding is only supported to a Posix server. (support for MS Windows and OSX as servers may be added in the future)
• you may encounter some permission issues: the user running the xpra server must be a printer administrator - whatever group that may be - if you need to add your user to a group you will also then need to logout and login again:
  • for Fedora and centos the sys group: gpasswd -a $USER sys
  • for Debian and Ubuntu the lpadmin group: usermod -a -G lpadmin $USER
• the cups backend must have 0700 permissions: chmod 700 /usr/lib/cups/backend/xpraforwarder
• selinux causes problems and must be disabled (see #815)

Installation and platform support

• centos will require some manual work (as the required RPM packages do not exist)
• MS Windows and OSX clients (10.6 onwards) should work out of the box
• Fedora 20+ should work out of the box
• Debian and Ubuntu: the dependencies are listed as "suggestions" only, so you may need to run apt-get install python-cups cups-pdf.

Usually, you will just need ​python-cups and ​cups-pdf.

Debugging

• run the xpra/platform/printing.py script to see which printers are detected
• run the client and server with the -d printing debug flags (see wiki/Logging)
• look for the cups backend messages in your syslog (ie: with journald: sudo journalctl -f -t xpraforwarder)
• more details here: ticket:913#comment:14