9 Replies Latest reply on May 19, 2017 3:06 PM by Intel Corporation

    HDMI Sleep Problems

    JamesG

      I've just purchased a new monitor (AOC Q2781PQ). When my PC instructs the monitor to go to sleep through HDMI it'll initially go to sleep and the backlight turns off.

       

      But it'll keep coming up with "NO SIGNAL" messages intermittently whilst it is sleeping.

       

      Sometimes the cycling of NO SIGNAL message then backlight immediately off, then on again, then the NO SIGNAL message, can happen repeatedly quite quickly.

       

      Sometimes it happens one time only, then happens again in maybe 10 minutes time.

       

      It it quite annoying.

       

      There seems to be an 'incompatibility' with the monitor sleep function between Intel HD4600 graphics and the AOC Q2781PQ monitor.

       

      I am using a Gigabyte H87N-WIFI V1.0 motherboard with Windows 10 Creators Update. I need to use HDMI to get 2560x1440 resolution.

       

      I previously had a ViewSonic monitor connected through a DVI <-> HDMI cable to the same port on the motherboard. It never had these issues.

       

      I have tried the following to resolve it:

      * Using the latest released driver (15.40.34.4624).

      * Upgrading the Intel Video BIOS from 1028 to 1043 (latest for Haswell/Broadwell). I had to make a custom BIOS to do this.

      * Different HDMI cable, different HDMI port on motherboard.

      * Using the Microsoft Basic Display Adapter driver. Same problem.

      * Using the Intel Linux graphics driver included with Ubuntu Linux 17.04. Same problem.

       

      None of this works.

       

      I note that other people have complained about this same HDMI sleep problem in the past with HD4600 graphics:

      https://communities.intel.com/thread/54141

      https://bbs.archlinux.org/viewtopic.php?id=175097

       

      It doesn't seem to have been fixed.

       

      Do I need to wait for a firmware / driver fix (probably never?) or is there some configuration settings I can try changing?

       

      Let me know if more info is needed.

       

      Thanks.

        • 1. Re: HDMI Sleep Problems
          Intel Corporation
          This message was posted on behalf of Intel Corporation

          Hello JamesG,

          Thank you for contacting Intel Communities.

          Can you please provide the following information to better assist you?

          Default level information for reporting Graphics issues and the reports listed on the thread.

          I hope to hear from you soon.

          Best Regards,
          JC

          • 2. Re: HDMI Sleep Problems
            JamesG

            I'll give you the descriptive info that is wanted.

             

            The diagnostics files have serial numbers and network information in them. I'm not uploading those publicly online. If you want them provide me an e-mail address to send it to, or other means of privately uploading.

             

            I'd suggest this is a firmware / low-level hardware issue given it happens on both Windows and Linux.

             

             

            Category

            Questions

            Answers (N/A if not applicable)

            Description

            Provide a detailed description of the issue

            When the PC has instructed the monitor to go to sleep it’ll initially turn off. But then intermittently the backlight will turn on, it will display NO SIGNAL, then immediately the backlight turns back off again.

            This is through a HDMI connection.

            Seems to happen regardless of operating system. Observed under Windows 10 and Ubuntu Linux 17.04.

            Other people have complained about this issue previously with HD4600 graphics:

            https://communities.intel.com/thread/54141

            https://bbs.archlinux.org/viewtopic.php?id=175097

            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.

            Custom-built. Uses Gigabyte H87N-WIFI motherboard, Intel Core i5-4570S CPU.

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

            No – only Intel HD4600.

            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)

            EFP – AOC Q2781PQ

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

            16GB

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

            Any HDMI cable.

            Hardware Stepping (see note1 below).

            Graphics is Rev 6.

            Software (SW)

            Operating System version (see note2 below).

            Windows 10 x64 Version 1703 (OS Build 15063.250)

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

            1043.0

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

            20.19.15.4624

            SW or Apps version used to replicate the issue.

            Windows is all that is needed.

            Configurations

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

            Single

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

            2560x1440 @ 60 Hz

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

            AC mode – this is a desktop computer.

            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. In Windows ‘Settings’, select ‘Power & sleep’, set ‘When plugged in, turn off after’ to a specific amount of time.
            2. Wait until monitor turns off.
            3. Watch monitor. Eventually backlight will turn on, it will display NO SIGNAL, then backlight immediately turns back off. This could happen quite quickly, or you may have to wait 20 minutes to see it.

            ...

            • 3. Re: HDMI Sleep Problems
              Intel Corporation
              This message was posted on behalf of Intel Corporation

              Hi JamesG,

              I have sent you a private message.

              Regards,
              JC

              • 4. Re: HDMI Sleep Problems
                Intel Corporation
                This message was posted on behalf of Intel Corporation

                Hi JamesG,

                Thank you for the information.

                Let me do some research on this and I will get back to you once I have updates.

                Best Regards,
                JC

                • 5. Re: HDMI Sleep Problems
                  Intel Corporation
                  This message was posted on behalf of Intel Corporation

                  Hello JamesG,

                  When the PC goes to sleep, the graphics controller will cut any video signal off, this is why you keep on getting the "No signal" message. The issue is more related to the monitor configuration other than issues with the graphics driver, this is why it happens with both Windows® 10 & Ubuntu.

                  You may want to check with the monitor manufacturer to see what is the expected behavior of your monitor, in addition, you can check if you have the latest .inf for your monitor (contact AOC for further information).

                  I hope this information helps.

                  Best Regards,
                  JC

                  • 6. Re: HDMI Sleep Problems
                    Intel Corporation
                    This message was posted on behalf of Intel Corporation

                    Hello JamesG,

                    I was reviewing this thread and I wanted to know if you contacted AOC?

                    Best Regards,
                    JC

                    • 7. Re: HDMI Sleep Problems
                      JamesG

                      Yes - I contacted the local AOC service/support office. They just replied asking for a serial number. Never heard anything at all after that.

                       

                      Monitor .inf is the latest I could find.

                       

                      I don't get the impression the monitor is supposed to do this. The behavior isn't consistent.

                       

                      Regards,

                      James Grant.

                      • 8. Re: HDMI Sleep Problems
                        Intel Corporation
                        This message was posted on behalf of Intel Corporation

                        Hi JamesG,

                        Thank you for the update.

                        Please let me know if you get any news from AOC, as you mentioned, this behavior didn't happen with your previous monitor, so this could be an issue with the new one other than issues with the graphics controller.

                        Regards,
                        JC

                        • 9. Re: HDMI Sleep Problems
                          Intel Corporation
                          This message was posted on behalf of Intel Corporation

                          Hello JamesG,

                          I was reviewing this thread and I wanted to know if you got news from AOC?

                          Best Regards,
                          JC