Comment 66 for bug 828761

I experience this issue as well on my desktop computer (shuttle xpc) since I recently installed a gfx-card with two digital outputs for a xinerama-setup and activated the nvidia-current driver. Before that I was using the internal graphics of my core i5 where everything worked fine (except that I couldn't connect my second monitor).
Now with the nvidia-driver, waking-up from suspend takes > 30s. First, the screen is black showing only the mouse pointer, which freezes repeatedly. Next, the mouse moves normally but it still takes several seconds until the locking-screen comes up. After unlocking, the unity bar shows colored noise until I hover over it which redraws it to its normal state.

Hope this will get fixed soon.