Thank your for the analysis. Deconnecting the on_expose function to expose-event fix the flickering and I suppose the CPU usage. IMO, background need only to be draw on creation of the window, it should not change during teh "life" of the window. I'll try to make a proper patch.
** Changed in: lxdm (Ubuntu) Status: Incomplete => In Progress ** Changed in: lxdm (Ubuntu) Assignee: (unassigned) => Julien Lavergne (gilir) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/733912 Title: lxdm-greeter-gtk excessive CPU usage -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs