Have had the same bug on a HP Pavilion zv5213ap notebook since hardy - now running up to date jaunty. Unsure if it's relevant but the notebook ocassionally drops to busybox at boot and does not resume from standby.
** Attachment added: "8254 timer bug on hp zv5213ap running jaunty" http://launchpadlibrarian.net/27368697/hp%20pavilion%20zv5213ap%20dmesg -- MP-BIOS bug: 8254 timer not connected to IO-APIC https://bugs.launchpad.net/bugs/283489 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