moniter has four small screens

[LuthienT]

I'm using Ubuntu 11.04 LTS.
My sister was watching a video on my laptop and when she looked down, the screen had split into four identical desktop screens. I really don't know what's going on here. Would updating or rebooting help?

https://mail-attachment.googleusercontent.com/attachment/?ui=2&ik=76389db899&view=att&th=137a728bb7c1c48b&attid=0.1&disp=inline&safe=1&zw&saduie=AG9B_P_7Oc4_keF885SihD2A5DdA&sadet=1338539725784&sads=pEsG2sauinSFQI_Du3v_nIYujU0&sadssc=1

[mcduck]

I can's see any screenshot on your post, but sounds like you have just accidentally clicked the button to show all workspaces, or perhaps pressed the Super+W shortcut to do that...

Just press Super+W again, or click any of the workspaces. :)

[LuthienT]

http://2.bp.blogspot.com/-A6HapgRh3_8/T8iaGRKrcgI/AAAAAAAAACQ/oyxB0KUX-lo/s320/photo.JPG
Yeah, I assumed that as well - except that when I do something in one window, the exact motion is mirrored in all others. That's not separate workspaces, is it?

Also, I don't mind if I have to reconfigure something or re-install Ubuntu. I'm mainly worried about whether this is a hardware or software problem.
I appreciate the help, so thanks.