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    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

    Pi4 unable to display >640x480 on Sony Bravia KDL-26ex550

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    • M
      mmajd80 @YFZdude
      last edited by

      @YFZdude

      Well, fudge.

      Is there a way to load the config at startup, prior to it failing? As mentioned above, I have no ability to SSH into the Pi and REALLY do not want to go through yet another full formatting and installation cycle.

      YFZdudeY 1 Reply Last reply Reply Quote 0
      • YFZdudeY
        YFZdude @mmajd80
        last edited by

        @mmajd80 If you have a SD card reader you should be able to edit the config.txt from another computer. If I'm not mistaken the config.txt should be in the /boot partition that is formatted as FAT32 so even Windows can read it.

        1 Reply Last reply Reply Quote 1
        • M
          mmajd80
          last edited by

          @YFZdude

          Dude, I think I love you?

          That was genius, the fix did work, though not quite as I expected. These are the new results from tvservice:

          Group CEA has 4 modes:
          mode 4: 1280x720 @ 60Hz 16:9, clock:74MHz progressive
          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

          Group DMT has 2 modes:
          mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive
          (prefer) mode 16: 1024x768 @ 60Hz 4:3, clock:65MHz progressive

          state 0xa [HDMI CUSTOM RGB full 4:3], 1024x768 @ 60.00Hz, progressive

          Notice that the DMT group has a new mode (and is also the one that is used). I changed the config.txt file to read "hdmi_mode = 16", thinking that it would use the mode 16 from Group CEA, but it created that new one instead.

          I feel like this is the very last thing to be done. How do I either switch to Group CEA or add another (functional) mode to DMT?

          1 Reply Last reply Reply Quote 0
          • M
            mmajd80
            last edited by

            I don't know if this helps, but for reference, under raspi-config, it shows me the following modes:

            4, 9, 16, 85, 35, 51, 82

            but I don't trust it, since 82 damn near gave me a heart attack.

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

              See this page for a list of supported video modes, there's no 1024x768 mode for CEA.

              Why are you forcing a 4:3 video mode when your display is 16:9 ? You can 'create' a new mode - see here, but if you already have it working, that would be redundant.

              M 1 Reply Last reply Reply Quote 1
              • dankcushionsD
                dankcushions Global Moderator @YFZdude
                last edited by

                @YFZdude said in Pi4 unable to display >640x480 on Sony Bravia KDL-26ex550:

                @mmajd80 said in Pi4 unable to display >640x480 on Sony Bravia KDL-26ex550:

                tvservices:

                Group CEA has 4 modes:
                mode 4: 1280x720 @ 60Hz 16:9, clock:74MHz progressive
                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

                Group DMT has 1 modes:
                (prefer) mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive

                state 0xa [HDMI CUSTOM RGB full 4:3], 640x480 @ 60.00Hz, progressive

                Call me crazy, but doesn't the above indicate that your TV won't fully support the "mode 85" (1280x768) settings you are trying to force it to use?

                i am not sure. if you set hdmi_safe it may list differently, hence i asked @mmajd80 to repost both the config.txt and output of that command again, after making suggested changes...

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                • M
                  mmajd80 @mitu
                  last edited by

                  @mitu

                  As you can see from above, the "prefer" is pointing to a DVT setting, so while the CEA setting exists for 1920x1080, I cannt use it. In the DVT list, there are only two options (640x480 and my current 1028x768). I am not trying to force anything, but rather figure out how to get hdmi_mode = [SOME VALUE THAT RUNS AND IS BIG].

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

                    @mmajd80 said in Pi4 unable to display >640x480 on Sony Bravia KDL-26ex550:

                    As you can see from above, the "prefer" is pointing to a DVT setting

                    This may be because you've manually added the mode to the config.txt.

                    so while the CEA setting exists for 1920x1080, I cannt use it

                    Why ?

                    M 1 Reply Last reply Reply Quote 0
                    • M
                      mmajd80 @mitu
                      last edited by

                      @mitu

                      Group CEA has 4 modes:
                      mode 4: 1280x720 @ 60Hz 16:9, clock:74MHz progressive
                      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

                      Group DMT has 2 modes:
                      mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive
                      (prefer) mode 16: 1024x768 @ 60Hz 4:3, clock:65MHz progressive

                      state 0xa [HDMI CUSTOM RGB full 4:3], 1024x768 @ 60.00Hz, progressive

                      <script src="https://pastebin.com/embed_js/iVcCj4g3"></script>

                      I don't know why, but you'll notice above that there are 2 modes with value = 16. If you look at the config.txt embed in the link, you'll see that I have set hdmi_mode = 16, hoping it was 1920x1080, but it is outputting 1024x768. I don't know why.

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

                        @dankcushions said in Pi4 unable to display >640x480 on Sony Bravia KDL-26ex550:

                        hdmi_group=2

                        If you take a look at the video configuration page I posted earlier, you'd see that 1080p (CEA) is:

                        hdmi_group=1
                        hdmi_mode=16
                        

                        you have

                        hdmi_group=2
                        hdmi_mode=16
                        

                        which forces the DMT-16 mode - 1024x768

                        M 1 Reply Last reply Reply Quote 1
                        • M
                          mmajd80 @mitu
                          last edited by

                          @mitu

                          Making that change resulted in the Check Device Output error I encountered above. I changed nothing else in the config, only that value from 2 --> 1.

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

                            That's strange, since the TV reports it supports the mode:

                             mode 16: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive
                            

                            Try maybe with 720p (hdmi_mode=4) ?

                            1 Reply Last reply Reply Quote 0
                            • dankcushionsD
                              dankcushions Global Moderator
                              last edited by

                              i would also comment out

                              hdmi_drive=2
                              

                              it's not on by default, and is only needed to fix sound issues AFAIK. it can have detrimental effects: https://retropie.org.uk/forum/topic/3975/hdmi_drive-2-fixing-audio-but-affecting-picture

                              M 1 Reply Last reply Reply Quote 1
                              • M
                                mmajd80 @dankcushions
                                last edited by

                                @dankcushions @mitu

                                Would it surprise you to know that I had audio troubles as well? Commenting out that line has resulted in no sound again. Unfortunately, it did not resolve the video issue, either with mode=4 or 16.

                                I got the same error with group = 1 and mode = 4. The issue seems to be with the group.

                                Not sure if this helps, but here is a screenshot from Advanced Settings --> Resolutions:
                                Advanced Settings.jpg

                                Setting mode = 82 (and 85) resulted in the error as well. It seems like I need to force the tvservice to include this mode somehow...

                                I should have warned you guys that nothing wrt me and technology work easily. I am probably on hour 25 of configuration.

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

                                  since 82 damn near gave me a heart attack.

                                  what do you mean by this? corruption in the image? it could be your HDMI cable is crapping out once more bandwidth is being asked of it. i would get a new micro hdmi cable (anecdotally, the first cheap one i bought didn't work properly)

                                  M 1 Reply Last reply Reply Quote 1
                                  • mituM
                                    mitu Global Moderator @mmajd80
                                    last edited by

                                    @mmajd80 said in Pi4 unable to display >640x480 on Sony Bravia KDL-26ex550:

                                    Would it surprise you to know that I had audio troubles as well

                                    No, but that's expected when using a DMT mode - since the Pi thinks you have PC monitor connected, not a TV. Should be fixable if you add hdmi_force_edid_audio=1 to force audio via HDMI.

                                    M 1 Reply Last reply Reply Quote 1
                                    • M
                                      mmajd80 @dankcushions
                                      last edited by

                                      @dankcushions

                                      No, I just meant that the error that changing it to an unsupported mode gave me the Check Display Output error and I was afraid I was going to have to start over AGAIN.

                                      The cable is from Pi itself, as is the power source. I will try the other cable it came with, but I don't think that's the issue.

                                      dankcushionsD 1 Reply Last reply Reply Quote 0
                                      • M
                                        mmajd80 @mitu
                                        last edited by

                                        @mitu

                                        If I want to use the create new mode function that you linked to earlier, do I just need to put in the line:

                                        hdmi_cvt=1920 1080 60 3 0 0 1

                                        ?

                                        Or do I need to define these variables with the code at the top as well?

                                        1 Reply Last reply Reply Quote 0
                                        • dankcushionsD
                                          dankcushions Global Moderator @mmajd80
                                          last edited by

                                          @mmajd80 said in Pi4 unable to display >640x480 on Sony Bravia KDL-26ex550:

                                          @dankcushions

                                          No, I just meant that the error that changing it to an unsupported mode gave me the Check Display Output error and I was afraid I was going to have to start over AGAIN.

                                          that's exactly the error i got with my bad micro hdmi cable, fwiw.

                                          i think we need and updated copy of config.txt for what you're trying. we've not seen one that looks right so far.

                                          M 1 Reply Last reply Reply Quote 1
                                          • M
                                            mmajd80 @dankcushions
                                            last edited by

                                            @dankcushions

                                            Lol, if all this pain was over a freaking cable...

                                            <script src="https://pastebin.com/embed_js/1PyavU7Q"></script>

                                            dankcushionsD 1 Reply Last reply Reply Quote 0
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