My monitor has lost some pixels!
My 27-inch Dell Ultrasharp monitor has been playing up. It’s been fine for a 18 months, but recently I got a new MacBook Pro and now I can’t get it to display at full resolution. It is stuck at 1280x768, which is much worse than the MBP can cope with and worse than it used to be on my old Mac! James Cottrel The monitor hardware is probably fine. It’s more likely a problem with the EDID (Extended Display Identification Data) configuration – a way for monitors to tell your graphics card the best way to format images for that screen. Some of the Dell monitors don’t list their native resolution properly, and if your graphics card driver doesn’t override this value, you can be stuck in 1280x768 or 1360x765. Open the Displays preferences and hold down å while you click the ‘Scaled’ resolution button. This shows all the display resolutions that your graphics card can output, and you can manually force 2560x1440. If the monitor still won’t cooperate, you’ll need to use an EDID override file. These are just text files, but creating one for yourself from scratch is a tall order; but there are override files for the Dell monitors at embdev.net/topic/284710.