On my Windows 7 32bit machine I'm running a VirtualBox instance of Xubuntu 9.10 32bit and I've noticed that the screen saver on the virtual box instance of Xubuntu never becomes active despite setting the timeout to 1 minute.
I also have a Kubuntu 9.10 instance that I also run on VirtualBox on this machine and this does actually become idle and activate the screen saver, locking the session which is the thing that I am trying to achieve.
I'm wondering if there are any suggestions for things to either check or change to get the system to become idle (it's a very bare installation, pretty much just the bare installation and Google Chrome) or whether there is some other method that I could achieve the same effect (have the system lock after 1 minute of inactivity) without relying on the screen saver?