FireFire

No, I tried HDMI/DVI/VGA. That's why I wonder if I need to have some aml working. Thanks

Thanks a lot, waiting for your report since my dual external monitors are not working at same time.

So you do get dual external screen working? I can only get 1 external monitor working at same time. Either internal LCD and VGA or internal LCD and DVI or internal LCD with DP.

Which DSDT.aml file are you using? I use the OP's one but can't get DP port working... THanks

That sounds a great solution. I will try it. Thank you. I have a E6500 and can't get dual screen working on the docking as well. Would you please share the change in the aml file since I can't direct use your aml file