Recompiling Karmic kernel and setting the timer frequency to 250Hz cured this same problem for me, although I'm using the PUEL version of VirtualBox 3.0.12. I'm on amd64 Karmic (Kubuntu 9.10) host, AMD 7750 dual core CPU, WinXP SMP guest.
For kernel compilation http://tinyurl.com/yb7pp5a instructions worked well, but it would be good to have 250Hz kernel as an option upstream, otherwise I need to keep compiling the kernel myself. -- VirtualBox performance is much worse when Intel VT-x is enabled https://bugs.launchpad.net/bugs/455112 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