My macbook need restart to detect external monitors, any hint?

[sarah.kho]

Hi,

I have a macbook pro 2010, core i5. I tried it with two external monitors and in both cases it does not detect the monitor unless I restart the laptop with the external monitor cable attached.

- I tested it with the mini displayport to VGA for the projector
- I tested it with mini displayport to displayport and the Dell U3011 LCD.

After the restart, it works fine and both monitors are detected but if I disconnect the LCD from laptop and plug it again, it wont work until I restart it.

I had mac os 10.6.x and now I upgraded to 10.7 and still the same issue.


Any comment or help is welcome.

Thanks.

 

[jbg232]

Are you starting the computer with the laptop in clamshell mode? That normally doesn't work very well from my experience.

 

[416049]

Hi,

I have a macbook pro 2010, core i5. I tried it with two external monitors and in both cases it does not detect the monitor unless I restart the laptop with the external monitor cable attached.

- I tested it with the mini displayport to VGA for the projector
- I tested it with mini displayport to displayport and the Dell U3011 LCD.

After the restart, it works fine and both monitors are detected but if I disconnect the LCD from laptop and plug it again, it wont work until I restart it.

I had mac os 10.6.x and now I upgraded to 10.7 and still the same issue.


Any comment or help is welcome.

Thanks.

I have the same issue 2/3 times however I use my laptop in clamshell mode, if i leave it open and do the disconnect,and replugging it works.