I am having a similar problem. I sometimes lock the screen and leave the computer running. If I leave it like that for a long time, such as overnight, neither the mouse nor the keyboard work. So I have to do a hard reboot. I don't have any crash report in my "/var/crash" directory.
I am attaching my syslog and syslog.0 ** Attachment added: "syslog.tar.gz" http://librarian.launchpad.net/7505793/syslog.tar.gz -- Ubuntu locks up - 7.04 https://bugs.launchpad.net/bugs/101846 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