MBP 2011: external displays not detected automatically My late-2011 13" MacBook Pro generally doesn't automatically detect external displays. At work or at home, I plug it to either a 23" Cinema Display (2005) or a 24" LG display using a Mini DisplayPort / DVI adapter.

Sometimes auto-detection of the display works out-of-the-box (notably, the first time I plug a display after a reboot), but most of the time I need to manually click "Detect Displays" in system preferences.

My two monitors work perfectly, my MDP/DVI adapter works too (confirmed by cross-testing with other Macs, other displays, other adapters). The problem only comes from my MacBook.

Does anyone experiences the same issue?


Model: 13" MacBookPro8,1 (late-2011)
MacOS: 10.7.3 (11D50 -- problem occurs since 10.7.0)
Graphics card: Intel HD Graphics 3000
Software that might affect the issue: iScreen 3.0.0 (even though the problem also occurs with iScreen uninstalled).
I solved that problem by connecting HDMI cable to another input of my external display. I don't know exactly what's the difference but it works for me.