5 Replies Latest reply on Aug 17, 2016 7:14 PM by Intel Corporation

    Lenovo T450 HD Audio playback problem


      I have a Lenovo T450 laptop with which I'm struggling to isolate 5.1 & 7.1 audio output problems over the DisplayPort. I have a home theater bluray disc player which supports 5.1/7.1 audio, and so does my receiver as the test tones it generates properly route to the 7.1 channel speaker setup I have. So I know the HDMI cable and the receiver are not the issue. I disconnect the HDMI cable from the bluray player, and connected it via a mini DisplayPort adapter to the Mini DP port on my laptop. I've also tried a different brand of mini DP adapter.


      The Win10 build 1607 Sound control panel applet detects the HD Audio DisplayPort connection and allows me to select Stereo, 3-Channel, Quadraphonic, 5.1 Channel, 5.1 Channel, or 7.1 Channel. Yes, there are two 5.1's listed... one shows side surround speakers and the other shows rear surround speakers. When I select 7.1, the control panel shows that it's attempting to send audio to all the speakers, but the sounds only comes out of the front left and front right speakers. When I choose one of the 5.1 selections, the test tones come out correctly from the L, C, R, and Sub channels... but for the rear speakers the test tones either only come out the side surround (even when I choose the option where it shows rear speakers instead of side speakers), or the the tones come out both speakers simultaneously (left side surround and left rear surround, for example).


      I'm asking here because I've read that the HD Audio is actually integrated the the Intel HD Graphics. The CPU in this T450 is a i5-5300U, and I've read that this CPU includes the HD 5500 GraphicsI don't know if the concern is related to the Realtek system & drivers, or the Intel DisplayPort drivers, or a combination, or something else entirely. Does this hardware support discrete 5.1 & 7.1 audio? If yes, what is causing this issue? If not, why is it allowing me to pick options which are not supported by the hardware? I'm completely up-to-date on all Lenovo driver updates and Windows Updates, except for a Intel Win Mgmt Engine update. That update was previously installed but was rolled back with Microsoft's feedback.



      Processor: Intel Core i5-5300U Processor(Core i5-5300U): : Memory: 4GB DDR3L 1600: : Operating System: Windows 7 Professional 64 preinstalled through downgrade rights in Windows 8.1 Pro 64(EN:English): : Hard Drive: 500GB 7200; 16GB: : Wireless Network: Bluetooth Version 4.0; Intel Wireless 7265AC(2x2)+BT4.0 M.2 Combo: : Ports: Ethernet; 3 USB 3.0; Microphone/Headphone Jacks; VGA out: : Camera: 720p HD Camera: : Monitor: 14.0 HD+: : Included Warranty: 3 Year Depot



      You may find additional detail in the following posts I've already made that I've unintentionally forgot to include here. Microsoft replied to me at this link indicating the driver doesn't support the desired feature due to the feature score within the driver rank:

      Quirky 5.1/7.1 surround sound


      Trying the Lenovo support forum but no feedback yet:

      T450 Win10 7.1 surround sound - Lenovo Community


      Thank you for any guidance you have to offer.



        • 1. Re: Lenovo T450 HD Audio playback problem



          Answers (N/A if not applicable)


          Provide a detailed description of the issue

          Test tones either don’t play or are sent to wrong speakers.

          Please place an X to the right of the option showing how often you see this issue using specific steps. (Ex: 'Every few times a game is started it flickers.' <- This would be "Often")

          Always (100%): X

          Often (51-99%):

          Sporadic (20-50%):

          Very Sporadic (<20%):

          Hardware (HW)

          Brand and Model of the system.

          Lenovo T450, machine type 20BV

          Hybrid or switchable graphics system?
          ie Does it have AMD or NV graphics too?


          Make and model of any Displays that are used to see the issue (see note2 below).
          = Local Flat Panel (Laptop panel)
          EFP = External Flat Panel (Monitor you plug in)

          LFP, EFP

          How much memory [RAM] in the system (see note2 below).


          Provide any other hardware needed to replicate the issue.
          ie: Cables&brand, cable type [vga, hdmi, DP, etc], dock, dongles/adapters, etc

          Mini Display port adapter: Gigaware PN 2602729 or Unitek Y-6331

          HDMI cable: any brand or length tested

          Hardware Stepping (see note1 below).

          See attachment

          Software (SW)

          Operating System version (see note2 below).

          See attachment

          VBIOS (video BIOS) version. This can be found in “information page” of CUI (right click on Desktop and select “Graphics Properties”.


          Graphics Driver version; for both integrated Intel and 3rd party vendors (see note2 below).

          See attachment

          SW or Apps version used to replicate the issue.

          Win10 Enterprise build 1607 Sound control panel applet


          Single display, clone, or extended (see note2 below).

          See attachment

          Display resolution & refresh rate setting of each display (see note2 below).

          See attachment

          AC or DC mode, i.e. is power cable plugged in or not?


          How to repro

          Please provide steps to replicate the issue.  These steps are very crucial to finding the root cause and fix.
          A screenshot to illustrate the issue is a huge plus. A video of the failure is even better! Attach to the post or provide the YouTube link.

          1. Connect a receiver which supports discrete 5.1 & 7.1 audio output to a 7.1 channel speaker system.
          2. Use the receiver menu to send test tones to all speakers to ensure they are connected to the correct physical speakers.
          3. Connect one end of the HDMI cable to an HDMI-in port on the receiver.
          4. Connect the other end of the HDMI cable to the mini DisplayPort <> HDMI adapter.
          5. Connect the mini DisplayPort adapter to the laptop.
          6. On Win10 Enterprise build 1607, ensure all Microsoft updates have been applied.
          7. Using Lenovo ThinkPad System Update utility, ensure all updates have been applied.
          8. In the Sound control panel applet, highlight the HD Audio device, and click Properties. Ensure it is supporting 8 channels. If not, change the receiver settings as necessary to recognize 7.1 channel communication.
          9. In the Sound control panel applet, highlight the HD Audio device, and click the Configure button.
          10. Choose the 7.1 channel speaker option, and click test. The audio tones only play on the front left and front right speakers even though the other speaker icons glow indicating it is sending the audio to the other channels.
          11. Choose the 5.1 channel option(s), and click test. The audio tones sometimes play on two surround speakers simultaneously, or the wrong single speaker.


          The DxDiag, SSU, HD5500 Hardware Stepping and DispDiag results are contained in this archive:


          • 2. Re: Lenovo T450 HD Audio playback problem
            Intel Corporation
            This message was posted on behalf of Intel Corporation

            Hello imCass:

            Thank you very much for all the information provided above.


            Did the 7.1 audio work fine before under this same configuration?

            Since you are using Windows® 10, did you try a BIOS update to the latest BIOS version?

            On the following link you will find the options to do a BIOS update, it says the latest one belongs to 7/25/2016:


            On the following link you will see the latest version: 4474, of the graphics driver for Intel® HD graphics 5500 controller:


            Try to un-install the current graphics driver from the laptop, and then install the driver above manually.

            Instruction to install the driver manually:


            Also, I found a guide to set up the 7.1 audio configuration that might be helpful for you:


            NOTE: These links are being offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.

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

            Any questions, please let me know.


            • 3. Re: Lenovo T450 HD Audio playback problem

              I have never had a need to try this feature prior to last week. According to the SSU.xml file I included in the archive attached above, I already have BIOS 1.25, and the BIOS on that web page is 1.24; it would appear their manual download pages might be behind the versions offered in their system update utility. I'll try the beta graphics driver and the MPC utility tonight. Thank you for your suggestions.

              • 4. Re: Lenovo T450 HD Audio playback problem

                I installed and configured MPC per your link, no change. Then I upgraded Display Audio driver to v6.16.0.3197, no change. Then I uninstalled and removed the current HD5500 driver, rebooted, installed the v20.19.15.4474 driver, no change. What next?

                • 5. Re: Lenovo T450 HD Audio playback problem
                  Intel Corporation
                  This message was posted on behalf of Intel Corporation

                  Hello JimCass:
                  Thank you very much for providing those details, that information is very helpful for us to further assist you.
                  At this point, we will start an investigation on this case in order to try to find a possible solution for this problem.
                  As soon as I get any results, I will post all the details on this thread.
                  Any questions, please let me know