HDMI switch handshake issues?

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  • spleenharvester
    Badcaps Veteran
    • Mar 2010
    • 882
    • UK
    #1

    HDMI switch handshake issues?

    Hi all,

    Got a bit of an odd problem with my setup. I have a cheapo 3 in/2 duplicate out HDMI splitter (this one). One output is connected to a HP 24fw display, whereas a computer (800 G1 USDT with Intel HD 4600 graphics) is connected to one of the inputs, and two consoles are connected to the others.

    The consoles work absolutely fine with it all the time, but the computer refuses to output video after it's been in standby for a while. The input light flashes on - the output light flashes on - then the output light goes off, then the input light goes off, and this cycle repeats forever. It will only come on after unplugging/replugging a bunch of times.

    I know this is a hopelessly vague problem but has anyone got any idea how to fix this? I've tried different cables etc and no change.

    Cheers
    Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD
    Tags: None
    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: HDMI switch handshake issues?

      When it works, does the PC identify the sink as 'HP 24fw' (PC detects the EDID of HP).
      What is other sink connected to the second HDMI output?
      Can the EDID mode of the device be set?
      Never stop learning
      Basic LCD TV and Monitor troubleshooting guides.
      http://www.badcaps.net/forum/showthr...956#post305956

      Voltage Regulator (LDO) testing:
      http://www.badcaps.net/forum/showthr...999#post300999

      Inverter testing using old CFL:
      http://www.badcaps.net/forum/showthr...er+testing+cfl

      Tear down pictures : Hit the ">" Show Albums and stories" on the left side
      http://s807.photobucket.com/user/budm/library/

      TV Factory reset codes listing:
      http://www.badcaps.net/forum/showthread.php?t=24809

        Comment

        • spleenharvester
          Badcaps Veteran
          • Mar 2010
          • 882
          • UK
          #3
          Re: HDMI switch handshake issues?

          Originally posted by budm
          When it works, does the PC identify the sink as 'HP 24fw' (PC detects the EDID of HP).
          What is other sink connected to the second HDMI output?
          Can the EDID mode of the device be set?
          1. Surprisingly yes it does,
          2. Nothing on the second HDMI output at the moment,
          3. Unfortunately not - only DDC/CI settings and they don't seem to affect the problem,

          Cheers
          Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD

            Comment

            • SMDFlea
              Super Moderator
              • Jan 2018
              • 20276
              • UK
              #4
              Re: HDMI switch handshake issues?

              What bios version does the pc have . Looking through the bios release notes - v02.59 Rev.A - Fixed the intermittent S3 resume issue .
              If your bios is older that that version update it ,it might fix your problem.
              Last edited by SMDFlea; 05-09-2020, 07:27 AM.
              All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                Comment

                • spleenharvester
                  Badcaps Veteran
                  • Mar 2010
                  • 882
                  • UK
                  #5
                  Re: HDMI switch handshake issues?

                  Latest one unfortunately! Only workaround I've been able to find is setting "Monitor Off:" to "Never" in power options. Not ideal but it does the trick.
                  Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD

                    Comment

                    • SMDFlea
                      Super Moderator
                      • Jan 2018
                      • 20276
                      • UK
                      #6
                      Re: HDMI switch handshake issues?

                      Are you using a DisplayPort to HDMI cable ,or an an active adapter .
                      All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                        Comment

                        • spleenharvester
                          Badcaps Veteran
                          • Mar 2010
                          • 882
                          • UK
                          #7
                          Re: HDMI switch handshake issues?

                          Interestingly enough I am using a DP to HDMI adapter yeah - no HDMI ports on this PC annoyingly.
                          Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD

                            Comment

                            • budm
                              Badcaps Legend
                              • Feb 2010
                              • 40746
                              • USA
                              #8
                              Re: HDMI switch handshake issues?

                              It looks like your box has the same issue as STARTECH product:
                              https://www.startech.com/faq/mst-hubs-sleep-issue
                              Never stop learning
                              Basic LCD TV and Monitor troubleshooting guides.
                              http://www.badcaps.net/forum/showthr...956#post305956

                              Voltage Regulator (LDO) testing:
                              http://www.badcaps.net/forum/showthr...999#post300999

                              Inverter testing using old CFL:
                              http://www.badcaps.net/forum/showthr...er+testing+cfl

                              Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                              http://s807.photobucket.com/user/budm/library/

                              TV Factory reset codes listing:
                              http://www.badcaps.net/forum/showthread.php?t=24809

                                Comment

                                • spleenharvester
                                  Badcaps Veteran
                                  • Mar 2010
                                  • 882
                                  • UK
                                  #9
                                  Re: HDMI switch handshake issues?

                                  That would make a lot of sense, but unfortunately setting to HDMI doesn't fix the issue for me. Killing the power to both devices seems to be the only way to get it working again.
                                  Dell E7450 | i5-5300U | 16GB DDR3 | 256GB SSD

                                    Comment

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