RetroPie forum home
    • Recent
    • Tags
    • Popular
    • Home
    • Docs
    • Register
    • Login
    Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first

    RP4B 2GB | HDMI to Samsung 4K TV not detected

    Scheduled Pinned Locked Moved Help and Support
    no signal
    14 Posts 4 Posters 1.3k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • O
      oswyevega @Addison
      last edited by

      @addison Not working. I'm using the closest port to the power supply port, but also tested in the other port, and it didn't work.

      1 Reply Last reply Reply Quote 0
      • mituM
        mitu Global Moderator
        last edited by

        Are you even using RetroPie ? Looks like you're using the newer Raspi OS (11), which is not yet supported by RetroPie.

        O 2 Replies Last reply Reply Quote 0
        • O
          oswyevega @mitu
          last edited by

          @mitu I switch the OS to test if it was a Retropie issue. I will install the OS again and test with these settings. Let you know if it works. Thanks again for your support!

          1 Reply Last reply Reply Quote 0
          • O
            oswyevega @mitu
            last edited by

            @mitu I installed Retropie 4.7.1 from Raspberry Pi Imager. This is my current config.txt settings:

            # uncomment if hdmi display is not detected and composite is being output
            hdmi_force_hotplug=1
            
            # uncomment to force a specific HDMI mode (this will force VGA)
            hdmi_group=1
            hdmi_mode=16
            gpu_mem=320M
            hdmi_max_pixel_freq:0=200000000
            hdmi_max_pixel_freq:1=200000000
            
            # Enable audio (loads snd_bcm2835)
            dtparam=audio=on
            
            [pi4]
            # Enable DRM VC4 V3D driver on top of the dispmanx display stack
            dtoverlay=vc4-fkms-v3d
            max_framebuffers=2
            
            [all]
            #dtoverlay=vc4-fkms-v3d
            overscan_scale=1
            

            Again, working on my monitor but not on my TV. I turned on my tv first, and then power on the raspberry. Any advice ?

            1 Reply Last reply Reply Quote 0
            • mituM
              mitu Global Moderator
              last edited by

              You should remove the gpu_mem setting, it's no use on a Pi4. Also, you've set the resolution explicitly, there's no need to add the other configurations (hdmi_max_pixel_freq).

              Does your TV support 1080p ? If you run tvservice -m CEA, what's the output ? You can run the command via SSH and copy the output.

              O 1 Reply Last reply Reply Quote 0
              • O
                oswyevega @mitu
                last edited by

                @mitu

                pi@retropie:~ $ tvservice -m CEA
                Group CEA has 4 modes:
                           mode 4: 1280x720 @ 60Hz 16:9, clock:74MHz progressive 
                  (prefer) mode 16: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive 
                           mode 95: 3840x2160 @ 30Hz 16:9, clock:297MHz progressive 
                           mode 97: 3840x2160 @ 60Hz 16:9, clock:594MHz progressive 
                

                Current config.txt

                # uncomment if hdmi display is not detected and composite is being output
                hdmi_force_hotplug=1
                
                # uncomment to force a specific HDMI mode (this will force VGA)
                hdmi_group=1
                hdmi_mode=16
                
                # Enable audio (loads snd_bcm2835)
                dtparam=audio=on
                
                [pi4]
                # Enable DRM VC4 V3D driver on top of the dispmanx display stack
                dtoverlay=vc4-fkms-v3d
                max_framebuffers=2
                
                [all]
                #dtoverlay=vc4-fkms-v3d
                overscan_scale=1
                
                1 Reply Last reply Reply Quote 0
                • mituM
                  mitu Global Moderator
                  last edited by

                  Though the list of supported modes is a bit short, 1080p seems supported. Other than double checking the cable, no idea at this time.

                  O 1 Reply Last reply Reply Quote 0
                  • O
                    oswyevega @mitu
                    last edited by

                    @mitu Thank you again for the support. Yeah, is a mystery to me as well since I got it working the first day with Steam Link and everything looked good. So don't know what changed from day one to day 2.

                    I'll review the HDMI cable and the power supply. Maybe that is the issue.

                    1 Reply Last reply Reply Quote 0
                    • busywaitB
                      busywait @oswyevega
                      last edited by

                      @oswyevega
                      Try putting this overclock line in to /boot/config.txt

                      core_freq=650
                      

                      It overclocks the "GPU", the core that is involved in putting data onto the HDMI cable. That change fixed a blank screen on my 4K PC monitor after I switched to the new (bullseye) Raspberry Pi OS.

                      Even without that change the blank screen went away when I used the official Raspberry Pi monitor cable - probably the best solution :)

                      O 1 Reply Last reply Reply Quote 0
                      • O
                        oswyevega @busywait
                        last edited by

                        @busywait I'll try this one and let you know the results! I also ordered the official HDMI cable and the official power supply, from Amazon, just to make sure!

                        Thanks for the advice! :)

                        1 Reply Last reply Reply Quote 0
                        • First post
                          Last post

                        Contributions to the project are always appreciated, so if you would like to support us with a donation you can do so here.

                        Hosting provided by Mythic-Beasts. See the Hosting Information page for more information.