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52 Posts

11-02-2010

canada

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ThinkPad P70 Workstation Dock with DVI monitor blank screen

2016-05-09, 14:22 PM

When I put my P70 on the dock station and I boot.  I'm not able to see the screen that boot on my Monitor.  I have a DVI connector.

 

I'm able to see the Windows screen when the boot ended, but not the boot menu.  I been in the BIOS and change the setting from THINKPAD LCD to all monitors (3th one).

 

if I want to see the boot menu, I have to open the p70 screen and close it after the boot.  I had no problem with my T510 and my monitor.

 

Do I have to change to a Displayport cable ? 

 

thanks

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52 Posts

11-02-2010

canada

85 Signins

345 Page Views

  • Posts: 52
  • Registered: ‎11-02-2010
  • Location: canada
  • Views: 345
  • Message 2 of 3

Re: ThinkPad P70 Workstation Dock with DVI monitor blank screen

2016-05-10, 12:06 PM
I solved the problem by changing the display to :Display to monitor on dock

and graphics to : discrete graphics

0 person found this solution to be helpful.

This helped me too

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1609 Posts

09-16-2014

US

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Re: ThinkPad P70 Workstation Dock with DVI monitor blank screen

2016-05-12, 19:34 PM

Think Engineering has provided additional information about why booting a ThinkPad P70 from a dock to a monitor connected via DVI cables or DisplayPort results in a blank screen.

 

The blank screen occurs because the discrete GPU will not turn on until the Windows device driver is loaded in Hybrid Graphics mode. Thus, a setup that uses DVI or DisplayPort on Dock cannot display the ThinkPad boot logo to external monitor.

 

There is a workaround to change this.

Go to BIOS Setup -> Config -> Display -> Graphics Device setting and change from “Hybrid Graphics” to “Discrete Graphics”. Please note that using Discrete Graphics mode will result in shorter battery life when the system is undocked.

 

Thank you,

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