DisplayPort audio not in Playback Devices

[KA1J]

Hi!

I do not have audio via the DisplayPort to a Samsung 4K TV. I do have a perfect picture. I have been using DisplayPort for some time with great audio and video from a ProBook 6560b.

History: I have been using a ProBook 6560b for watching internet videos on the TV for several years. I use a DisplayPort >HDMI adapter cable to connect them. I never had any issues with this. I used the free upgrade to go to Win 10 and had no issues with DisplayPort audio after the upgrade.

I accidentally hit the power button and the computer died instantly, somehow that caused the SSD to go dead. However, I have a 2nd ProBook 6560b that I also had Win 10 on but tried Linux on it and never liked it. I loaded Win 10 and tried to use the displayport but had no audio. I looked under the audio playback devices and only saw one active device, for the laptop speakers. I loaded Win 7 as a fresh install thinking those drivers might work but they did not. I used the IDT High-Definition (HD) Audio Driver V. 6.10.6433.0 from the HP driver download https://support.hp.com/us-en/drivers/selfservice/hp-probook-6560b-notebook-pc/5045605 . When I play a video on the TV the video is perfect but the audio comes from the laptop.

Looking at the playback device info it only shows:

 

I removed the IDT driver and went to the native Windows driver and then it showed microsoft speakers and three non connected HDMI devices. Connecting to the displayPort does nothing, no video, no audio; no recgonition of a connection.

I tried an updated IDT driver for win 7 & 8.1, the Intel HD Graphics Driver for Windows 7/8-64-bit "win64_152824" and ended up with the same results.

Nothing I have tried has allowed me to get an audio driver to come up to select for the TV.

To add to the confusion, I used my girlfriend's HP laptop 6450b which has the same driver from the link above, plugged in the DisplayPort adapter and started her computer and when I played a youtube video, the audio came through perfectly. Looking in the audio devices it had the IDT High Definition Audio Codec but it also had a Samsung audio device showing. 

I disconnected the adapter cable from her computer, turned off my computer, connected the cable to mine and started it up again, just as I had done with hers. However there was no Samsung audio showing and the audio only comes from the laptop. 

But here is what is the most confusing to me, I can't get her computer to show the Samsung audio again, only that one time when it worked with the Youtube video.

Does this problem sound familliar? Any suggestions what I might try doing at this point?

Thank you. 

[Paul_Tikkanen]

Hi:

Go to the device manager and click to expand the sound, video and game controllers device manager category.

There should be two audio devices listed there.

IDT HD audio (for the notebook speakers)

Intel HD audio (for the display port).

Let me know what you see listed there.

[KA1J]

Hi Paul,

Thank you for the reply.

Here is what is showing:

I have Intel display audio, not Intel HD Audio available.

[Paul_Tikkanen]

That's the one.

That device should be working the Display Port audio out.

Unfortunately, I have no idea why it isn't showing up in your manage audio devices section of the control panel.

[KA1J]

I can appreciate that, I have no answer either and I've been working with computers for more than 40 years. I am though unknowing when it comes to this. Have you any drivers for me to try? I'd hate to have to go to a desktop with an add-on PCIE card to use to do this, especially when it's proven that this copmputer/OS/drivers have worked earlier.

[Paul_Tikkanen]

Here's the problem...

HP does not support your notebook for W10, and there are no W10 graphics drivers on the support page.

There isn't even a W8.1 Intel graphics driver on the support page (for which I am at a loss to understand).

The graphics driver contains the HDMI audio driver to work the audio out of the display port.

This would be the only idea I can think of for you to try.  It's a long shot.

I have zipped up and attached below, the Intel audio driver out of the W8 graphics driver.

Download and unzip the file to its folder.  Do not do anything with the files in the folder.

Go to the device manager, click to expand the Sound, Video, and game controllers device manager category.

Click on the Intel Display Audio device.

Click on the driver tab.  Click on Update Driver.

Select the Browse my computer for driver software option, and browse to the driver folder you unzipped.

Make sure the Include Subfolders box is checked, and see if the driver installs that way.

Restart the PC, and see if you now get the Intel audio device to show up where you can select it when you connect via the display port.

[KA1J]

Paul,

Thanks for the idea. Unfortunately the answer was the most current driver is already installed. Nothing was loaded and a reboot did nothing to change this.

The irony is I have been using the ProBook 6560b like this for at least two years now, using the displayport with the same adapter cable with no issues whatsoever. Not being able to use this on this back-up computer makes no sense to me and the part about my gitrlfriend's laptop working with the displayport untill I unplugged the adapter cable this morning is absolute truth. There was a Samsung device in the playback devices in hers but it is not there now. While it was there, everything worked. Without it there is nothing but video.

The reality is this model computer (the first one had the SSD failure) and hers both had both audio and video sent to the TV effectively. I am at a complete loss.

I will have to try another TV with a HDMI in and see if it works there. Perhaps it has something to do with the TV though I can't see how that would affect the audio drivers in the computer.

Gary

[Paul_Tikkanen]

Sorry that didn't work, Gary.

I am also at a complete loss.

If you figure out what the issue is, please post back and let us know how you fixed it.

Paul

[KA1J]

Paul,

Well this is crazy, I brought out my 8 year old Sceptre DTV and plugged it in, switched the HDMI end of the adapter plug to it and look at this...

*** Well, for whatever reason, it's not showing the screen print when I post it but the X32BV-FullHD Intel Display Audio device is now showing... ***

The problem lies with the Samsung 4K! For some reason info is not being passed to enact the signals necessary for the Display Audio to engage with the Newer model TV.  I just played a video from youtube and it had fine audio with the old TV, not as great video as on theSamsung  4K, but both video and audio.

So does the problem lie with the HP's inability to send a viable signal to the Samsung or the Samsung unable to engage with the HP? This TV is one of the highest rated Samsung but obviously something's needs are not being met. 

Lovely...

Gary

*** Edited because the image didn't come through.

[Paul_Tikkanen]

That's a good question Gary, for which I do not have a clue as to what the answer is.

I can't imagine why it matters what TV you connect the PC to, but for some reason the Samsung TV does not like that HP notebook.