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    A New Chapter for MagicMirror: The Community Takes the Lead
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    Lost resolution after reboot?!?

    Scheduled Pinned Locked Moved Solved Troubleshooting
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    • K Offline
      Kai-Christoph
      last edited by

      Hi there,
      my MagicMirror worked fine, until I had to rebbot the Pi for some reason.
      After rebooting the resolution is far too low. I use a Samsung Syncmaster 245B+ with FullHD.

      How can I fix this?

      Cheers
      KC

      1 Reply Last reply Reply Quote 0
      • yawnsY Offline
        yawns Moderator
        last edited by

        Hi. Was your display switched off during reboot? I had that with my tv and follow a small tutorial to save my display settings so the pi does not care if the display is on or off during boot

        1 Reply Last reply Reply Quote 1
        • K Offline
          Kai-Christoph
          last edited by

          No, unfortunately the Monitor was turned on. I think there is sth wrong with the settings in /boot/config.txt
          But I can’t figure out, how to fix this.

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          • K Offline
            Kai-Christoph
            last edited by

            So, here ist my /boot/config.txt:

            # For more options and information see
            # http://www.raspberrypi.org/documentation/configuration/config-txt.md
            # Some settings may impact device functionality. See link above for details
            
            # uncomment if you get no picture on HDMI for a default "safe" mode
            hdmi_safe=1
            
            # uncomment this if your display has a black border of unused pixels visible
            # and your display can output without overscan
            #disable_overscan=1
            
            # uncomment the following to adjust overscan. Use positive numbers if console
            # goes off screen, and negative if there is too much border
            #overscan_left=16
            #overscan_right=16
            #overscan_top=16
            #overscan_bottom=16
            
            # uncomment to force a console size. By default it will be display's size minus
            # overscan.
            #framebuffer_width=1280
            #framebuffer_heiframebuffer_width=1080
            #framebuffer_height=1920
            #framebuffer_depth=32
            #framebuffer_ignore_alpha=1
            
            # 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=2
            hdmi_mode=69
            
            # uncomment to force a HDMI mode rather than DVI. This can make audio work in
            # DMT (computer monitor) modes
            hdmi_drive=1
            
            # uncomment to increase signal to HDMI, if you have interference, blanking, or
            # no display
            #config_hdmi_boost=4
            
            # uncomment for composite PAL
            #sdtv_mode=2
            
            #uncomment to overclock the arm. 700 MHz is the default.
            #arm_freq=800
            
            # Uncomment some or all of these to enable the optional hardware interfaces
            #dtparam=i2c_arm=on
            #dtparam=i2s=on
            #dtparam=spi=on
            
            # Uncomment this to enable the lirc-rpi module
            #dtoverlay=lirc-rpi
            
            # Additional overlays and parameters are documented /boot/overlays/README
            
            # Enable audio (loads snd_bcm2835)
            #dtparam=audio=on
            
            display_rotate=3
            avoid_warnings=1
            
            

            The Samsung Syncmaster 245plus has a native resolution of 1920x1200@60Hz.
            I think the hdmi_group an _mode settings are correct, but it still doesn’t work…
            What is wrong?

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            • K Offline
              Kai-Christoph
              last edited by

              /opt/vc/bin/tvservice -s
              state 0x120006 [DVI DMT (4) RGB full 4:3], 640x480 @ 60.00Hz, progressive
              

              That is the resolution shown by the Raspi.

              Slowly I have the feeling like sitting at an Windows-Machine…

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              • yawnsY Offline
                yawns Moderator
                last edited by

                Could you try this?
                https://weblogs.asp.net/bleroy/getting-your-raspberry-pi-to-output-the-right-resolution

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                • K Offline
                  Kai-Christoph
                  last edited by

                  /opt/vc/bin/tvservice -m CEA
                  Group CEA has 2 modes:
                             mode 4: 1280x720 @ 60Hz 16:9, clock:74MHz progressive 
                             mode 16: 1920x1080 @ 60Hz 16:9, clock:148MHz progressive 
                  
                  /opt/vc/bin/tvservice -m DMT
                  Group DMT has 1 modes:
                    (prefer) mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive 
                  

                  The Mirror worked for mont without any issues…

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                  • yawnsY Offline
                    yawns Moderator
                    last edited by

                    @Kai-Christoph said in Lost resolution after reboot?!?:

                    hdmi_group=2

                    means “use DMT”
                    hdmi_group=1 would use CEA

                    So I would suggest finding out possible modes in CEA and set these in your config.txt

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                    • K Offline
                      Kai-Christoph
                      last edited by

                      tvservice -d edid
                      Nothing written!
                      

                      I tried this before…
                      edid seems not to work.

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                      • K Offline
                        Kai-Christoph
                        last edited by

                        Now I tried this, as mentioned here

                        hdmi_cvt=1920 1200 60 5 0 0 1
                        

                        Nothing happened: The Raspi stucks on 640x480…

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