I've found out that under some /yet unknown/ conditions Xgl is so slow to start that the session starts before Xgl is ready.
See bug #174408 for a similar issue. As a workaround you can either uninstall xgl or disable autostart with "touch ~/.config/xserver-xgl/disable" -- Xserver-xgl cause a crash on Gnome Session https://bugs.launchpad.net/bugs/160283 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