I resolve the issue on my machine thanks to this article: http://linux.koolsolutions.com/2009/08/04/howto-fix-linux-hangfreeze- during-reboots-and-restarts/
All I had to do was to had 'reboot=pci' to the kernel parameter at boot time. For a permanent change on grub2, edit /etc/default/grub, and add 'reboot=pci' to the 'GRUB_CMDLINE_LINUX' -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/780757 Title: Dell Latitude E6420 fails to reboot -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
