I'm assuming you're using Ubuntu Karmic, which brings a new unstable release of GTK+ and its new incompatible changes in the XInput event processing. Try applying to the source code the two patches at http://sourceforge.net/tracker/?func=detail&aid=2829716&group_id=163434&atid=827735 (should fix the difficulties of drawing with devices other than tablet pens) and http://sourceforge.net/tracker/?func=detail&aid=2816361&group_id=163434&atid=827735 (for the latter one: the revised version that says "also fixes menu issues in GTK+ 2.17")
Hope this helps, Denis ** Bug watch added: SourceForge.net Tracker #2829716 http://sourceforge.net/support/tracker.php?aid=2829716 ** Bug watch added: SourceForge.net Tracker #2816361 http://sourceforge.net/support/tracker.php?aid=2816361 -- xournal input defaults to diagonal line, cannot change option https://bugs.launchpad.net/bugs/404019 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