I also have an Inspiron XPS M1210, with the same symptoms. I can confirm that the nmi_watchdog=0 boot option, combined with "blacklist video" fixes the freezes. I'm going to mark this bug as confirmed, but believe that attributing it to gnome-power-manager is wrong - it's more likely a kernel bug.
Does anyone know if the bug still occurs in the latest Fiesty? -- Notebooks freezes after closing lid or pressing some FN key combination https://launchpad.net/bugs/65027 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
