Yes, complementing my previous comment, I am attaching the NVIDIA bug report Log. I know that you cannot change or improve the NVIDIA drivers but maybe in the log you can see what is causing this rare behaviour (maybe a misinteraction between the packages, as I asummed previously) and fix it accordingly.
I have also sent an email to the NVIDIA linux support team, with the same log, as to see if something is not functioning properly. I hope it helps.... ** Attachment added: "nvidia-bug-report.log" http://launchpadlibrarian.net/32738370/nvidia-bug-report.log -- Jaunty & Interpid: won't power off on shutdown or reboot https://bugs.launchpad.net/bugs/326988 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs