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Boot problems when using DAC+ with official 7" touchscreen

Hans

August 20, 2018 13:09

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Hi all,

My two DAC+ installations work without any problems with Volumio since a long time. Now I'm using an official 7" Raspberry Touchscreen on one of them  I discover serious problems.

System boots and I can use the GUI but no audio is played,  most often the system does not boot at all and the screen stays black until the next try. Sometimes, let's say 1:10 tries, it boots and all works fine but this happens seldom.

I'm afraid the DAC+ is the suspect because all works fine when I select audio playback via the phone connector on the RPi board and not the DAC+.

On the Volumio forum there is a discussion going on and founder Michelangelo is watching too. I refer to that posting for all my tries so far, my username on that forum is VoluHans.

Does anyone have suggestions to solve this?

Regards, Hans.

Volumio thread: https://volumio.org/forum/volumio-doesn-always-boot-t10485-20.html 

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6 comments

• 0
  
  HiFiBerry team August 20, 2018 13:52

  If you have connected the display to the I2C GPIO pins, that will cause this problem. The display must not be connected to the I2C GPIO pins.

  Best regards,
  Daniel

• 0
  
  Hans August 20, 2018 14:07

  Hi Daniel,

  Thanks for helping! Because I saw something about I2C on this board (https://support.hifiberry.com/hc/en-us/community/posts/115000435525-HiFi-Berry-Amp-with-official-7-touchscreen-GPIO-conflict- ) I did remove both I2C wires before so the display is only connected via the flatcable, Vcc and GND. Sorry to say this makes no difference.

  Maybe important to let you know the RuneAudio has the same issue but in most cases (say 90%) it will boot correct.

  Regards, Hans.

  Edited by Hans August 20, 2018 14:17
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  HiFiBerry team August 20, 2018 14:22

  In this case, the only thing I can think of is an unstable power supply. 
  You should also try a standard Raspbian to make sure it isn't some problem in the Volumio configuration.

  Best regards,
  Daniel

• 0
  
  Hans August 20, 2018 14:34

  Hi Daniel,

  I did use my benchpower, some USB-chargers and now a switching power supply of 4-5 ampere. The switching power has a build in delay so the 5 volt power is put through 3 seconds after connecting the supply to the main outlet.

  The power consumption on startup is about 900 mA and the board power, on RPi and DAC+, is 5.1 volt. Testing with my oscilloscope did not show anything is wrong.

  On Volumio thread someone wrote he powered the display and RPi from separate power supplies. Not tested by me and not sure if that makes any difference. Are you experienced with that suggestion?

   

  Regards, Hans.

  Edited by Hans August 20, 2018 14:34
• 0
  
  HiFiBerry team August 20, 2018 14:36

  If the power supply is stable, it shouldn't make a difference to using seperate power supplies.
  Try a plain Raspbian, it might be a bug in Volumio.

  I know a lot of users are using the DAC+ with the display an Max2Play without problems.

  Best regards,
  Daniel

• 0
  
  Hans August 20, 2018 14:45

  Thanks again Daniel, I will continue experimenting until it is solved ;-)