Could somebody check if this issue is reproducible when only gdm window left alone even though the Xorg will blank the screen. I am experiencing something similar on my (Debian) system, but the sympthoms does not look the same fully. E.g. in my case the system did not freeze if the gdm login left open even when after the screen goes blank.
I am using Debian system, but though that additional info will be applicable here too. Here is corresponding bug in Debian BTS: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=605909 Looks to be a kind of similar problem. ** Bug watch added: Debian Bug tracker #605909 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=605909 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/591699 Title: Lenovo Thinkpad x100e freezes when X blanks screen -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs