Intel Display Audio (Intel HD Graphics 4600) and 5.1 Surround Sound

[RHeid]

I'm using a Toshiba Satellite S55T with onboard IDT sound. However, I'm not using the on board sound. I'm trying to pass audio through HDMI to a Monoprice (https://www.monoprice.com/product?p_id=5557 https://www.monoprice.com/product?p_id=5557) switch to split the audio signal off. From the Monoprice switch, I send the audio signal via optical cable to a Panlong 5.1 decoder similar to this (https://www.amazon.com/Panlong-Audio-Digital-Decoder-Converter/dp/B00AMC2J1Y/ref=sr_1_1?ie=UTF8&qid=1487543435&sr=8-1&keywords=panlong+5.1 https://www.amazon.com/Panlong-Audio-Digital-Decoder-Co...).

The audio is handled by the laptop by Intel Display Audio (Intel HD Graphics 4600) over the HDMI cable. When I go and configure the Intel Display Audio connection under Sound, I get a choice of stereo, 2.1, 3.1, 5.1, 7.1 speakers. I select 5.1, and start the audio test. Here's where the problem is--I can only hear tones from the front left and front right speakers. The test routine shows that it is trying to send a tone out to the other speakers, but I can't hear anything.

Switching to my DirecTV service using the Monoprice switch, I get full 5.1 sound. Running a self test on the Panlong decoder shows that all speakers are working properly. But for some reason Windows will not play 5.1. The laptop is properly detecting that the speakers are attached, because I can switch the Monoprice to 2 channel mode and my only speaker selection in Windows shows stereo only. Switch back to 5.1 on the Monoprice, and Win 10 reports that the surround speakers are there. Still only the front left and right speakers work.

The vexing thing is that this USED TO WORK!!! I noticed, about a week ago when I was encoding a documentary, that I couldn't hear the dialogue, only the ambient noises. I thought I encoded the show improperly because the documentary was originally in French with english as an afterthought, so I did it again. No change.

I've tried rolling back drivers, going back to the Manufacturer's web site. I've tried older Intel drivers, as well as the newest release. I've unstalled the device and deleted the drivers and then let Windows Redetect and install new drivers. Nothing seems to work

I'm assuming that this is a graphics driver problem, since I am trying to use the Intel Display Audio to handle all sound tasks.

Any ideas?

[idata]

Hello MooseFlunky:

Thank you very much for letting us know that information.

Based on the fact that this same sound configuration used to work I just wanted to check if you did any software changes on the laptop?

Do you know if a Windows update was done?

Please provide the BIOS version and the graphics driver version that are currently installed on the laptop?

We always recommend to install the drivers provided by the manufacturer of the laptop, on the following link you will find the drivers for the Satellite S55t-A5237 for Windows® 10, not sure if that is the specific model of your laptop, but if it is you can try to install the IDT Audio driver and DTS Sound / DTS Studio Sound:

http://support.toshiba.com/support/modelHome?freeText=1200005833&osId=26 http://support.toshiba.com/support/modelHome?freeText=1200005833&osId=26

Also, the link below is for the 4501 driver, is the latest version available for graphics controller Intel® HD Graphics 4600:

https://downloadcenter.intel.com/download/26229/Intel-Graphics-Driver-for-Windows-10-15-40-4th-Gen-?product=81496

Please let me know the results of trying the steps above.

Any further questions, please let me know.

Regards

Alberto

[RHeid]

Hello Alberto,

Thank you for the help.

As far as I can tell, there have been no new software updates, although Microsoft may have run a Windows Update on me while I was not paying attention. I don't recall adding any new software that might have compromised the audio systems.

The laptop model number is S55T-A5237

The Bios info is as follows:

OS NameMicrosoft Windows 10 HomeVersion10.0.14393 Build 14393Other OS DescriptionNot AvailableOS ManufacturerMicrosoft CorporationSystem Name*******System ManufacturerTOSHIBASystem ModelSatellite S55t-ASystem Typex64-based PCSystem SKUPSKK2UProcessorIntel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz, 2401 Mhz, 4 Core(s), 8 Logical Processor(s)BIOS Version/DateTOSHIBA 1.90, 9/19/2014SMBIOS Version2.7Embedded Controller Version1.30BIOS ModeUEFIBaseBoard ManufacturerTOSHIBABaseBoard ModelNot AvailableBaseBoard NameBase BoardPlatform RoleMobile

In addition, I removed and then reinstalled both the IDT driver and the latest Intel driver that you listed in your response. There was no change in behavior. I've attached a few images showing where this seems to be happening. In the second image, when testing the configuration, only L and R "speak". All of the other channels remain mute, even though the test sequence seems to be trying to send a signal to them.

[idata]

Hello MooseFlunky:

You are welcome.Thank you very much for providing those details and for sharing the pictures, we really appreciate that. We will review this case in order to try to find a possible solution to fix the sound problem. As soon as I get any updates from our research, I will post all the details on this thread. Any questions, please let me know. Regards Alberto

[idata]

Hello:

Thank you very much to Dr3aDnAuGhTz for letting us know that information. To MooseFlunky: I just wanted to let you know that I just received some updates from the research we are doing on this matter. Could you please try the following driver? It is version 4624: https://downloadcenter.intel.com/download/26623 https://downloadcenter.intel.com/download/26623 Please let us know the results of installing that driver. You mentioned this same configuration was working fine before, in that case we can try to do a "Windows Recovery" to go back to a "System Restore Point" from a date when it worked fine, and if that fixes the problem then please verify the driver version installed at that point, just enter "Windows Recovery" on the search bar "Cortana" in order to do it. Please back up any important information before trying this option.Please let me know the results of trying the steps above. Any questions, please let me know. Regards Alberto

[RHeid]

Hello, Alberto,

I just tried installing the new driver. There was no change in behavior. The sound configuration behaves exactly the same as before--only front Left and front right work.

I also tried using VLC Media player, and it is also only playing two channels.

It may take me a while to figure out when the last time the system worked properly so that I can try a system restore. I'll let you know if I can figure it out.

Please continue to work on this issue for me. I really appreciate your help in this matter.

[idata]

Hello MooseFlunky:

Thank you very much for letting us know those results, we really appreciate that. We are sorry to hear the problem persists. And yes, we will continue reviewing this case in order to try to find a possible fix for this problem. As soon as I get any more details, I will post all the information on this thread. Any questions, please let me know. Regards Alberto

[RHeid]

Thank you, Alberto!

I'll be looking forward to hearing about any developments

[CMale1]

... yes, 3 month later, I'm also looking forward to hear about any development...

obviously there are none...

I'm on a Kaby Lake i5 7200U with HD620 Graphics and have the same problem as discribed in the first post. Only left and right gives sound, the others are silent. I am on the very latest chip set drivers (10.1.1.42) and graphics driver (win64_154519.4678). The problem still persists.

And it seems to be around for years, if I check the Internet, and seems to be independant of the hardware involved.

So, either Intel is completely unwilling or unable to solve this, or it is so simple that everybody should be able to do it in a second.

If it is the second, please, tell me how to solve it.

Best Regards

[idata]

MooseFlunky: I just received some updates from the research we are doing on this matter. And just to let you know, our Debug team has been unable to reproduce this issue using a A/V Receiver: YAMAHA RX-V663. They were able to play sound with 5.1 Surround with no problems at all.

Based on that information, this appears to be a potential compatibility issue with the Receiver you are using and the laptop. For testing purposes, please try to install the following driver: 4279. That is an old driver, but this just to rule out a possible regression bug. Once you get the chance, please let us know the results: https://downloadcenter.intel.com/download/25308 https://downloadcenter.intel.com/download/25308 Any questions, please let me know. ctm001: Please submit your inquiry on a new thread, the reason for that is that every scenario is different, even if the same product is being used, so, for us to better assist you to try to fix the specific problem the system might have, please submit a new thread:/community/tech https://communities.intel.com/community/tech Let me apologize for any inconvenience. Regards,Alberto R

[idata]

MooseFlunky: I just wanted to check if you were able to install driver 4279 and if you need further assistance on this matter?

Any questions, please let me know. Regards,Alberto R

[RHeid]

Hello Alberto,

Yes, I was finally able to install driver 4279 and then reboot the system. The problem remains the same.

It seems that as long as the HDMI can direct play (without having to go through the operating system) the audio channels, everything works perfectly. However, any time the windows drivers get involved in handling audio, I only get two channels.

So, after installing 4279, rebooting the system, and then trying to reconfigure the sound, I still only have FR and FL audio on the 5.1 setting. See the image above, dated March 12th, to show what I'm talking about.

The problem is definitely not fixed, and does seem rooted in the HDMI stream.

[idata]

MooseFlunky: Thank you very much for sharing those details.

We will continue with our research on this matter. As soon as I get any updates I will post all the details on this thread. Any questions, please let me know. Regards,Alberto R

[idata]

MooseFlunky: I just received an update on this matter, based on that information by testing an older driver we can confirm if this problem is actually a regression bug or not. Since the problem persists after that, then it looks like a compatibility issue with the Monoprice, and in this case the best thing to do will be to get in contact with the manufacturer of the Monoprice to report this scenario.

Any questions, please let me know.

Regards,Alberto R

[JSmit111]

Hi MooseFlunky,

I am having the same issue since upgrading to /thread/112326 20.19.15.4549

Display audio does not work via HDMI and it detects multiple screens when no other displays are connected.

Please let us know if you resolve

Kind Regards,

Joel.