[Thinkpad X220] Clover boot slightly skewed horizontally

[Fyod]

I remember seeing a fix somewhere, but can't remember. x220.mcdonnelltech.com doesn't mention anything.
The Apple logo and Clover boot menu are slightly "fatter" than they should be.
Anyone happen to know the fix?

 

[Fyod]

Tried setting 1366x768 in config.plist GUI to no avail.