This sounds like the type of problem when there is a bug in the graphic driver software for your graphics card (hardware). Does this happen in other programs, especially other graphics programs? An updated driver might fix this. There may be other causes too.
-Ken _______________________________________________ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user