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ptr727
Fanfold Paper
Posts: 8
Registered: ‎07-24-2017
Location: US
Views: 95
Message 1 of 2

External displays on ultra dock no longer recognized

I powered my T470p on this morning after a month vacation, and after updates my external monitors no longer work.

 

On powering my machine on Windows Update ran, Lenovo Update prompted me for a ME BIOS updated, I rebooted, external monitors came up.

But after I undocked to go to a meeting, came back, redocked, the external monitors no longer show up.

 

I connect using an ultra dock 170W that is connected to DP to monitor 1 daisychaned to monitor 2.

On cold power up I see the lenovo logo on one external display, but when windows boots no external monitors.

 

I treid ctrl + shft + win + b that sometimes works, but nothing.

 

 

Seems like some update broke the dock and DP.

Any ideas?

ptr727
Fanfold Paper
Posts: 8
Registered: ‎07-24-2017
Location: US
Views: 50
Message 2 of 2

Re: External displays on ultra dock no longer recognized

I fixed the problem by display driver uninstall with delete for the intel and nvidia drivers, then reboot, windows auto installs older driver from windows update, and I get my external display back.

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