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DisplayPort Adapter not working

I have a few new computers that all have a Display Port adapter. I purchased multiple DisplayPort to VGA adapters to hook up projectors or a second monitor. The units I purchased do not have a vga out connection. I can not get this to work. I have a laptop with both vga out and a displayport. I attempt to hook either a monitor or projector and it works fine. If I try to hook it into the displayport through the displayport to vga adapter it will not work. Is there a setting I need to change?

Thanks,

Gajendra Rathod

you mean, your laptop is connected to displayport and displayport connected to monitor.

Please try below things

1. Reboot displayport in case it is powered externally.

2. Decrease resolution of your notebook.

3. Third reboot your notebook and display also.

xema

jamiebehl
"I purchased multiple DisplayPort to VGA adapters", Brand & model will be helpful, also the type, brend and model of computers you're trying to connect.

jamiebehl

ASKER

I have rebooted and changed resolution. It works fine straight to VGA. They are startech display port adapters. I have both Lenovo m90z and Asus laptops.

Gajendra Rathod

Please update display driver to latest version and check again

jamietoner

Most likely the display ports you have are digital only and not digital and analog so a passive adapter will not work since there is no analog signal. To go from digital to analog(vga is analog) it would require an active displayport to vga. Do you have the model of the adapters you bought? Startech makes active and passive adapters.

jamiebehl

ASKER

I will check the model of the adapters tomorrow. I have updated video drivers on both type of machines.

jamiebehl

ASKER

Here is the model of the adapter.

http://www.cablestogo.com/product.asp?cat_id=113&sku=54129&st=54129

jamietoner

That seems to be a passive adapter. Here's a link to an active adapter
http://www.newegg.com/Product/Product.aspx?Item=N82E16812270279&nm_mc=OTC-Froogle&cm_mmc=OTC-Froogle-_-Adapters+and+gender+changers-_-BYTECC+INC-_-12270279&sa=X&ei=sVqET5PTM4Wi2gWx6sHnCA&ved=0CH4QgwgwCQ

jamiebehl

ASKER

How are you able to determine this information? They both say DisplayPort 1.1a. I'm a little confused.

Gajendra Rathod

In the BIOS settings, please set DisplayPort as a default video output.

jamiebehl

ASKER

There are not any settings under the BIOS for video output.

Gajendra Rathod

Please check that Bios is update to latest firmware.

jamiebehl

ASKER

I will give the BIOS update a try tomorrow. The computer is less the 6 months old. I did talk with CablesToGo and it is a passive adapter but they don't seem to think that would cause this problem.

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jamietoner

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jamiebehl

ASKER

I will order some active adapters today and let you know how they work. It might take a few days to get in.

Thanks so much.

jamiebehl

ASKER

The active adapters were received and work like a charm. I can't believe that cablestogo had no idea that the passive adapters would not work.

Thanks for the help.