Ever since I updated to 10.5.2, booting my MBP with the external screen attached meant that the external screen wasn’t detected properly, and ran at the same resolution as the MBP screen. Initially, I read something on TUAW which suggested booting with the external screen not attached, and then attaching the screen once Leopard had finished booting.
This does work, but it’s not ideal. Tonight I got annoyed with it after hooking the MBP back up, and found this updated post on TUAW explaining a better fix.
power on the laptop, immediately close the lid (with external display still attached) and wait for the machine to boot completely. I tried it; lo and behold, the external display is now recognized correctly, and when the machine is slept and awakened or “Detect Displays” is triggered, everything behaves as expected.
Works for me - thanks TUAW
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