Excuse my lack of knowledge. How to set debug to true ? I will try to restart the all system (halt and restart comptuter).
In practice, I updated my dapper. I disconnected from GNOME. I restart X but Ctrl-Alt-Delete. A dialog told me gdm could launch because of somthing about glade. Xdm launched. After a look at the bug 42080, I try three times to restart X (same method). I worked. -- gdm doesn't want to start https://launchpad.net/bugs/42212 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs