The log file does not seem to contain any helpful information. Your issue may be triggered some customized settings specific to your user account. Can you verify that other accounts or the guest session are affected too? Maybe even do a clean install or simply boot into the live session to confirm the bug.
** Changed in: xfdesktop4 (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1451384 Title: right-click menu on desktop unavailable after upgrade to 15.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xfdesktop4/+bug/1451384/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs