[aux]

My setup: Macbook Pro (current model) running 10.6 with 15" screen at 1680x1050, connected to a 24" external screen (1920x1200) using mini Displayport to DVI. When restating the computer in clamshell mode (lid closed), the resolution on the external screen is incorrect, possibly 1680x150 and shifted to the left, so part of the image is outside of the viewing area and the part that is visible looks bad, because it is not the native resolution. The displays are set so that the external screen is the main one and are not mirrored.

The only way to use the computer is in clamshell mode is to start it with the lid open, log in, then close the lid, the computer goes to sleep, I need to wake it up and the external screen resolution stays correct. This is quite annoying, considering that I was using the same external screen with an old Powerbook rinning 10.4 (miniDVI-to-DVI connection) without any issues.

Any ideas how to fix this?

[ibook_steve]

Originally Posted by aux 

The only way to use the computer is in clamshell mode is to start it with the lid open, log in, then close the lid, the computer goes to sleep, I need to wake it up and the external screen resolution stays correct.

This is the way you're supposed to use closed lid mode, which is why it works. Can you explain better what order of operations you used to use that is now not working?

Steve

[aux]

Originally Posted by ibook_steve 

This is the way you're supposed to use closed lid mode, which is why it works. Can you explain better what order of operations you used to use that is now not working?

Steve

In each of the 2 scenarios below, the external screen resolution was correct with the old Powerbook and is not correct with the new Macbook Pro:

1) restarting the machine with closed lid (the external resolution was fine before restart, in the case of Macbook Pro, achieved by the process in my original post)

2) starting the machine and immediately closing the lid

[aux]

any ideas?