Comment 70 for bug 425411

I have a similar problem on a Lenovo ThinkPad T400s. If I unplug the machine while it's asleep, it just freezes outright on resume. I can see the login screen, but the mouse and keyboard don't function, and the "I" bar (text entry cursor) is not blinking per usual.

The resolution described in comment #47 seems to fix the issue for me (though I'm not exactly sure what it does).

I'm running a fully up to date copy of Karmic.