I think the problem is problem at the origin of the following bug: https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/152264
which is quite annoying (see the screenshot). ** Attachment added: "Screenshot.png" http://launchpadlibrarian.net/10774216/Screenshot.png -- gksudo should use AIGLX to produce perfect fade effects https://bugs.launchpad.net/bugs/76932 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs