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DisplayPort Issues
Posted: Sat Jan 29, 2011 2:45 pm
by miketoro
So I'm gathering that DisplayPorts on Thinkpads don't do audio?
Not cool.
I found
this thread, which is rather old now, and that's the conclusion.
Does anyone know if this has changed? Please tell me that's changed and I'm just doing something wrong ...
I have a T400s running to a 1080p TV via a DisplayPort to HDMI adapter and HDMI cable.
There is no sound (problem No. 1) and the image does not fill the whole screen (problem No. 2).
Is there a way to get audio through the TV with this rig?
Is there a way to get a full 1080p image?
Thanks for the help,
Mike
Re: DisplayPort Issues
Posted: Sun Jan 30, 2011 5:09 am
by lead_org
T400s, T500, R500, W500 displayport only supports video signal, this is a hardware limitation. There are expensive converter box out there to merge additional digital audio channel with the digital video channel into another displayport channel that supports both audio and video.
Are you using 1080p resolution in your T400s? or are you using different resolutions?
Re: DisplayPort Issues
Posted: Sun Jan 30, 2011 9:19 am
by miketoro
Rats. Thanks for the info.
The ThinkPad resolution is at it's highest available to me: 1440x900 ...
Re: DisplayPort Issues
Posted: Sun Jan 30, 2011 11:22 am
by Colonel O'Neill
Are you duplicating the display, extending the display, or outputting external only?
Re: DisplayPort Issues
Posted: Sun Jan 30, 2011 8:29 pm
by miketoro
Colonel O'Neill wrote:Are you duplicating the display, extending the display, or outputting external only?
I've tried all three with the same results, but the ultimately I'd like the TV as an extended display in full 1080p ...
Re: DisplayPort Issues
Posted: Sun Jan 30, 2011 9:27 pm
by lead_org
what OS are you using?
Re: DisplayPort Issues
Posted: Mon Jan 31, 2011 3:04 pm
by miketoro
lead_org wrote:what OS are you using?
Windows 7 Ultimate 64
Would the same DisplayPort lack of audio apply if I plugged it into a Mini Dock or Mini Dock Plus?
http://www.thinkwiki.org/wiki/ThinkPad_ ... k_Series_3
http://www.thinkwiki.org/wiki/ThinkPad_ ... s_Series_3
Re: DisplayPort Issues
Posted: Wed Feb 02, 2011 5:01 am
by lead_org
the lack of audio in the displayport is limited by the intel chipset, using the dock as mentioned by you won't do anything to change that.
Also, try to change the external LCD resolution using the intel display driver to see whether you can get the correct 1080p resolution.
Re: DisplayPort Issues
Posted: Wed Feb 02, 2011 11:56 am
by miketoro
lead_org wrote:the lack of audio in the displayport is limited by the intel chipset, using the dock as mentioned by you won't do anything to change that.
Also, try to change the external LCD resolution using the intel display driver to see whether you can get the correct 1080p resolution.
Thanks for your help. I did play with the Intel driver, with no luck. I ordered another adapter and will report back whether that changes anything ...
EDIT: New adopter, nothing happened.