The symptom change a bit recently, rather than screen stay black, and monitor going in energy saving mode, now the X window come back. Not sure which /var/log/ would help... Let's try Xorg.0.log first.
** Attachment added: "bug reporter's Xorg.0.log" http://launchpadlibrarian.net/10699897/Xorg.0.log -- Virtual Terminal (VT, e.g. Ctrl-Alt-F3) is completely black [Hardy, i945GZ] https://bugs.launchpad.net/bugs/162400 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