Given that this started immediately after upgrading to 11.04, I'm inclined to think it's a software issue. Further, it's not that the mouse stops working, but rather, it stops working in a single X session. As I wrote, using startx to start a second gives me a working mouse.
That said, is there more information I could provide? -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/816580 Title: Mouse freezes after screensaver lock To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/816580/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp