id summary reporter owner description type status component version resolution keywords cc guest host 5501 Karmic as host x64 very slow with SMP Perry G "I have tried 3 times to either upgrade or clean install Ubuntu 9.10 x64 then install VirtualBox 3.0.10 and any Windows guest or Debian guest. The install goes fine and shows no complaints except the VM's are extremely slow. Switching to one processor helps but it is still a lot slower then running 3.0.10 on Ubuntu 9.04 x64. I figure is has something to do with their new kernel but can not find any information on what to do to fix this. Is this an issue that you are aware of and if so what do I need to to to help get this fixed? I am back to Ubuntu 9.04 now but can install 9.10 again if need be. It is just such a hassle since this is the primary OS, I wanted to see what you said before I went down that road again. PS I am now at 3.1.0B but the problem was in 3.0.10 just to let you know. It works exactly the same in either" defect closed guest smp VirtualBox 3.0.10 fixed All x64 Guests other Linux