I have a 2012 air 11" and connect with Samsung SyncMaster T260HD monitor. Under Display, air shows SyncMaster display have the following resolution: 1080p 1080i 720p 480p 1920 x 1200 1600 x 1200 No matter which resolution I selected, the Samsung monitor shows really unclear. Do I need to install any driver for the monitor? Any feedback will be appreciated!!!