Crazy problem with second "ghost" monitor

[jackblack87]

hey guys,

i've got a very confusing problem with my monitor settings. if you take a look at the attachment, there's an additional motinor at the right bottom corner (red circle).
the problem is: there is no second monitor

can someone help me to erase that monitor? thanks!

 

[jackblack87]

has no one an idea?

 

[Machupicchu]

Im having a similar issue after a graphics card install.

 

[jackblack87]

@Machupicchu: Problem solved with the 10.8.3 Combo Update!

 

[nyolc8]

If you have a similar problem, then you using wrong framebuffer, or you need to edit ati-personalities(recommended only for pro users)