During my kvm/qemu testing, even before Gutsy was released, I had similar problem - guest operating system would stall (both windows and linux) randomly when I would switch workspaces in GNOME, shift focus from application to application, etc... As soon as I would move focus back to qemu/kvm window, everything would continue. Sometimes even that wouldn't help.
But, I never had those problems on my workstation, only on my laptop. Workstation has Intel E6400 CPU, while laptop is occupied with Intel T2400. True, I didn't do so many tests on workstation, as I did on laptop...
At the moment, I'm doing encrypted setup of server's release candidate, with hardy's qemu+kqemu, and I didn't have problems (I'm at 15% of wiping partition).
During my kvm/qemu testing, even before Gutsy was released, I had similar problem - guest operating system would stall (both windows and linux) randomly when I would switch workspaces in GNOME, shift focus from application to application, etc... As soon as I would move focus back to qemu/kvm window, everything would continue. Sometimes even that wouldn't help.
But, I never had those problems on my workstation, only on my laptop. Workstation has Intel E6400 CPU, while laptop is occupied with Intel T2400. True, I didn't do so many tests on workstation, as I did on laptop...
At the moment, I'm doing encrypted setup of server's release candidate, with hardy's qemu+kqemu, and I didn't have problems (I'm at 15% of wiping partition).