13 Replies Latest reply on Nov 16, 2017 4:30 PM by Intel Corporation

    Driver issue ?  Skylake + PCH H110 + MST hub  to implement 3 independent displays

    vokmeng

      Hi ,

       

      I have implemented a project with the configuration like below.

      The goal is to have 3 independent displays.

       

      Now , The situation is  " Intel GPU driver OS(windows 10 64bit)   can detect these 3 display.

      but, It only can enable 2 of 3 at the same time.

      Is it the VBIOS issue or intel GPU Driver issue ?

       

        • 1. Re: Driver issue ?  Skylake + PCH H110 + MST hub  to implement 3 independent displays
          Intel Corporation
          This message was posted on behalf of Intel Corporation

          Hi Thank you very much for contacting the Intel® Graphics communities. We will do our best to try to fix this problem.

          In order to provide the most accurate response, please provide the SSU report, run the tool with the 3 monitors connected and then please attach the file to this thread, to do that you must click "Use Advanced Editor" in the top right corner of the response box, then the "attach" option will appear in the bottom right corner of the response box.
          https://downloadcenter.intel.com/download/25293/Intel-System-Support-Utility-for-Windows-

          Which is the screen resolution you are trying to use for each monitor?
          How many display ports are you using?
          How many monitors by port are installed?

          Any further questions, please let me know.

          Regards,
          Alberto R

          • 2. Re: Driver issue ?  Skylake + PCH H110 + MST hub  to implement 3 independent displays
            Intel Corporation
            This message was posted on behalf of Intel Corporation

            I just wanted to check if you saw the information we requested previously and if you need further assistance on this matter?
             
            Any questions, please let me know.
             
            Regards,
            Alberto R
             

            • 3. Re: Driver issue ?  Skylake + PCH H110 + MST hub  to implement 3 independent displays
              vokmeng

              Hi, Alberto

               

              I have seen this message.

              But, I am in a bussiness trip. So, I have not  use SSU tool.

               

              I will back to my office on 11/6.

              I will use SSU on that day.

               

              Thanks and best regards

               

              Vok Meng

              • 4. Re: Driver issue ?  Skylake + PCH H110 + MST hub  to implement 3 independent displays
                Intel Corporation
                This message was posted on behalf of Intel Corporation

                Hi : Perfect, thank you for letting us know those updates. No problem at all, take your time and provide the report once you get the chance.

                Any questions, please let me know.

                Regards,
                Alberto R

                • 5. Re: Driver issue ?  Skylake + PCH H110 + MST hub  to implement 3 independent displays
                  vokmeng

                  Hi , Alberto

                   

                  I have been back in Taiwan.

                  The attachment  is the SSU report from our developing platform.

                   

                  The below is my reply for your questions.

                   

                   

                  1. Which is the screen resolution you are trying to use for each monitor?

                   

                       ans :     The resolution is not fixed , it depends on customer's application.

                                   We want 3 display to show different content at the same time.

                                    And we hope 3 display can perform 1920x1080 resolution at the same time. 

                   

                  2. How many display ports are you using?

                          ans : we are using two display port   DP0 and DP1

                         

                                     DP0 connect to DisplayPort Monitor directly.

                                     DP1 connect to a DP MST hub , and the MST hub connect to two displayport monitor.

                                     Just like the block diagram below.

                  3. How many monitors by port are installed?

                   

                  ans : Three monitor would be installed, you can see he picture.

                          There are 3 DP++  , every DP++ port will connect to one monitor.

                          So ,Totally 3 monitors.

                          And the connection configuration, I have replied in Question 2.

                   

                   

                  Thanks and best regards

                   

                  Vok Meng

                   

                   

                   

                   

                  • 6. Re: Driver issue ?  Skylake + PCH H110 + MST hub  to implement 3 independent displays
                    Intel Corporation
                    This message was posted on behalf of Intel Corporation

                    HI Thank you very much for clarifying and proving that information and the report.
                     
                    In order for you to be able to use 3 different monitors with 1920x1080 resolution, you will need to connect the 3 monitors to the HUB. Please make sure that the cable that goes from the computer to the HUB is a high quality high speed display port cable, once you do that you should be able to set the triple display configuration.
                     
                    Any questions, please let me know.
                     
                    Regards,
                    Alberto R
                     

                    • 7. Re: Driver issue ?  Skylake + PCH H110 + MST hub  to implement 3 independent displays
                      vokmeng

                      Hi , Alberto

                       

                      It is not our application.

                      Our MST hub only have 2 displayport  outputs.

                      So , we can not do what you suggest.

                       

                      And , There is no reason , which says  our configuration is not correct.

                      Please focus on our configuration , And help us find what is the root cause?

                       

                      For our configuration, the situation right now is

                      1. under BIOS menu , all three displays can works together , show the same content.

                      2. Display MST topology has been detected and recognized by intel graphic Driver.

                      2. three display can be detected in OS with intel HD510 driver.But, only  two of them can be activated.

                       

                      Please see the pictures below

                       

                      1. three display can work together in BIOS menu.

                      3 display clone in BIOS.PNG

                       

                      2. DisplayPort MST Topology  has been established and reconfigured  by graphic driver.

                      MST hub.PNG

                      2. 3 display can be detect , but only 2 can be activated

                      Inked3 display_LI.jpg

                      4. 的Driver Version and VBIOS Version , I have also tried VBIOS version with 1052.0 , but won't help.

                      Driver.PNG

                       

                       

                      Best regards

                       

                      Vok Meng

                       

                       

                       

                       

                       

                       

                      • 8. Re: Driver issue ?  Skylake + PCH H110 + MST hub  to implement 3 independent displays
                        Intel Corporation
                        This message was posted on behalf of Intel Corporation

                        Hi : Thank you very much for providing those details and for the pictures, we really appreciate that.
                         
                        Just for testing purposes, based on your first picture, could you please connect second and third monitor with a straight connection on display port 0, without using the HUB and then get into the Intel graphics control panel to verify if they are properly detected and if you can change the resolution on them? This is just to rule out a possible compatibility problem with any of the monitors.
                         
                        Besides that, could you please provide the information requested on the link below, except the SSU report that you already gave us:
                        https://communities.intel.com/message/319025
                         
                        Any questions, please let me know.
                         
                        Regards,
                        Alberto R
                         

                        • 9. Re: Driver issue ?  Skylake + PCH H110 + MST hub  to implement 3 independent displays
                          Intel Corporation
                          This message was posted on behalf of Intel Corporation

                          I just wanted to check if you saw the information we requested previously and if you need further assistance on this matter?
                           
                          Any questions, please let me know.
                           
                          Regards,
                          Alberto R
                           

                          • 10. Re: Driver issue ?  Skylake + PCH H110 + MST hub  to implement 3 independent displays
                            vokmeng

                            Hi , Alberto

                             

                            This is my reply

                             

                             

                            Category

                            Questions

                            Answers (N/A if not applicable)

                            Description

                            Provide a detailed description of the issue

                            Can not enable 3 displays at the same time with the configuration :

                            Skylake CPU + PCH H110 + MST hub

                             

                            you can see the block diagram picture I attached in last few reply.

                             

                            In BIOS Menu those 3 display can show the same content( picture attached before)

                             

                            in windows (7 and 10) , only two of them can be enabled at the same time. But , all of then can be detected.( picture also attached before)

                             

                            I am highly doubt that this issue is related to driver configuration when PCH is H110, It seams Driver is not allowed to support 3 displays when PCH is H110.

                             

                            But , It is nun-sense , any one could use MST hub to expend their display number.

                            Driver should not be limited by PCH selection.

                             

                             

                            Please , please understand my question. my issue.  and Trust me , more forms would not get any help.

                            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%): 3 display always detected but cannot enable 3 at the same time.

                            Hardware (HW)

                            Brand and Model of the system.

                            It is our own product, it is prototype.

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

                            we want switch graphic feature.

                            But , we have not go to that state.

                            Graphic need to support NV and AMD.

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

                            it is list my reply before.

                            we use two DDI port on skylake cpu.

                            one DDI is configured as DP++

                            the other on is configured as DP, and is connected to an on-board MST hub IC. To make this DDI port to support two DP( like the block diagram before)

                             

                            So, both of DDI ports are EFP.

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

                            Two channels , place 4GB memory module on each channel. So, there are 8GB.  For different customer application, it could be expended to 16GB. 

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

                             

                            Hardware Stepping (see note1 below).

                             

                            Software (SW)

                            Operating System version (see note2 below).

                            windows 10 , windows 7 , 64bit.

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

                            1052 .

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

                            22.20.16.4518

                            SW or Apps version used to replicate the issue.

                            Don't need APP to replicate. Just can not enable 3 displays on the same time.

                            Configurations

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

                            extended of course.

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

                            I think it is not important.

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

                            I think it is not important.

                            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.

                            Don't need any steps , it just cannot enable 3 displays at the same time.

                             

                            I am highly doubt that this issue is related to driver configuration when PCH is H110, It seams Driver is not allowed to support 3 displays when PCH is H110.

                             

                            But , It is nun-sense , any one could use MST hub to expend their display number.

                            Driver should not be limited by PCH selection.

                             

                            Please , please understand my question. my issue. 

                             

                            Trust me , more forms would not get any help.

                             

                             

                            Thanks and best regards

                             

                            Vok Meng

                            • 11. Re: Driver issue ?  Skylake + PCH H110 + MST hub  to implement 3 independent displays
                              Intel Corporation
                              This message was posted on behalf of Intel Corporation

                              Hi : Thank you very much for providing that information, we really appreciate that. Could you please also provide the DxDiag report and DispDiag? We just need to verify some specifications of your system.
                               
                              Any questions, please let me know.
                               
                              Regards,
                              Alberto R
                               

                              • 12. Re: Driver issue ?  Skylake + PCH H110 + MST hub  to implement 3 independent displays
                                vokmeng

                                hi, Alberto

                                 

                                Those reports are on attachment.

                                 

                                 

                                Thanks and best regards

                                 

                                Vok Meng

                                • 13. Re: Driver issue ?  Skylake + PCH H110 + MST hub  to implement 3 independent displays
                                  Intel Corporation
                                  This message was posted on behalf of Intel Corporation

                                  Thank you very much for sharing those reports. We will do further research on this matter, as soon s I get any updates, I will post all the details on this thread.
                                   
                                  Any questions, please let me know.
                                   
                                  Regards,
                                  Alberto R