Permission denied on /dev/ttyMCC after upgrade!

Discussion in 'UDOO NEO' started by waltervl, Mar 26, 2016.

  1. waltervl

    waltervl UDOOer

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    Hi Neo team, @Andrea Rovai @Francesco

    I just did a sudo apt-get update and sudo apt-get upgrade
    Unfortunatly now I cannot access the serial device /dev/ttyMCC anymore without sudo.
    This also means I cannot use the internal Arduino IDE serial monitor: Error opening serial port '/dev/ttyMCC' (Permission denied)
    Also my python program that uses the /dev/ttyMCC to communicate with the arduino side stopped working!
    Error: Permission denied : '/dev/ttyMCC'

    This all worked perfectly just before the upgrade. Please check the UDOO Neo upgrade!!!

    I will go back to the original RC1 image
     
  2. waltervl

    waltervl UDOOer

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    Well to be sure it wasn't me I repeated it:
    - Flashed SD card with a new image UDOObuntu_neo_v2.0rc1
    - Started Arduino IDE, set Board and port. Opened serial monitor, no issues.
    - Did a sudo apt-get update and sudo apt-get upgrade
    -
    Shutdown completely, disconnected power and connected power again to boot.
    Started Arduino IDE. Opened serial monitor: Permission denied on /dev/ttyMCC !
     
  3. Mikeee

    Mikeee Member

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    Looks like there has been some big upgrades made. Duplicated your steps and noticed upgrade of Browser. We can fix access to /dev/ttyMCC with the following:

    sudo chgrp -f dialout /dev/ttyMCC

    sudo chmod g+rw /dev/ttyMCC
     
    Last edited: Mar 29, 2016
    waltervl likes this.
  4. ektor5

    ektor5 Administrator Staff Member

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    Checked that, fixed.
    Please redo apt-get update && apt-get upgrade.

    Thanks to all and sorry for that,
    ek5
     
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  5. waltervl

    waltervl UDOOer

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    I can confirm that after a new upgrade this issue is solved!
    Thanks for the quick response!
     

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