T410 with Optimus an Mindock Plus 3 - Bootscreen is missing

[westi]

Hello !

I'm using a T410(2537-9UG; BIOS 1.37; ECP:1.14) with Optimus in a Mindock Plus 3 and a external Display, witch is with a displayport cable connected. When the default setting in the BIOS (Config->Display->Nvidia Optimus) is selected, I got no bootscreen on the ext. Display. This is bad, because I'm using a power-on password at the machine startup. The ext. Display shows a screen not before the W7 logon screen is loaded.

When I select the discrete Grafik in the BIOS I can select other Boot Display Devices like Displayports 1 or 2 from the dockingstation. Then I get the bootscreen. But this is very circular, because when I want to use the machine mobile I've to change these settings first, to be able to use Optimus.

When I select the integrated Grafikchip in the BIOS I get only a bootscreen and a picture on the ext. Display, when I connect the Displayportcable directly to the T410.

Does anybody have a idea to get a Bootscreen with Optimus ??

Greetings

Jürgen

[westi]

I posted this question also in the Lenovo forum:
Here's the answer: http://forums.lenovo.com/t5/T400-T500-a ... d-p/533311

The reason is: Hardware limitation: If one wants to see the bootscreen, he has to change the BIOS-setting to discrete Garphic an the bootscreen to Dock 1 or 2 before you put your machine in the docking station. If you want your machine for mobile use with "Optimus", you have to change all settings back....

What a great solution !

Greets from a frustrated

Jürgen