I have a really weird problem with ubuntu natty:
I have 2 monitors (Dell 2407wfp and Dell 2007wfp) connected via DVI to a Ati X1600 graphics card. Everything works well in normal configuration, but when I rotate the 2007wfp it displays only garbage (I can see the cursor like normal trough).
Funny thing is when I rotate the 2407wfp or both, everything is normal. I've tried to swap the connectors on the graphics card but that didn't change anything.
I am using the open source ati driver.