I am marking this as 'confirmed' as I can reproduce the problem with the latest qemu-kvm package. Turning off cpu frequency scaling is a valid workaround for me, but the clock on the guests drift a lot whenever I forget to change the governor.
$ LANG=C apt-cache policy qemu-kvm qemu-kvm: Installed: 0.11.0-0ubuntu6.3 Candidate: 0.11.0-0ubuntu6.3 Version table: *** 0.11.0-0ubuntu6.3 0 500 http://archive.ubuntu.com karmic-updates/main Packages 100 /var/lib/dpkg/status 0.11.0-0ubuntu6 0 500 http://archive.ubuntu.com karmic/main Packages ** Changed in: kvm (Ubuntu) Status: Fix Released => Confirmed -- guest needs to boot with clock=acpi_pm (older AMD freq scaling issues) https://bugs.launchpad.net/bugs/361754 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