OS: Ubuntu 9.10

Specs: Lenovo Y41 (Centrino Duo, Intel Integrated GPU)

Enable Display Settings in Tray

Go to Sistem -> Preferensi -> Tampilan

(System -> Preferences -> Display, cmmiw)

Then mark the check list for “Perlihatkan tampilan di panel” and press “Terapkan” (“Apply”).

Check list

After you do that, there would be an icon in the tray:

Tray icon

You can close the Tampilan (Display Preference) now because

Everytime You Plug A Monitor/Projector Into Your Laptop

Just click on the tray icon, choose'”Configure Display Settings…”  and it will automatically detect your monitor and adjusting your display.

So,

Can you have simpler way than this?