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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

      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.

      1 Reply Last reply Reply Quote 0
      • 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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                    • K Offline
                      Kai-Christoph
                      last edited by

                      Man, I could freak out: The HDMI to DVI cable is somehow broken. I replaced it and everything works fine again. I spent hours to solve the problem… F**K!

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

                        Oh bad. Good you found it and good it was not fault of Windows … errm Raspbian ;)

                        1 Reply Last reply Reply Quote 1
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