Iconia A1-830 OTG USB Host Issue

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iconia-a1-830
iconia-a1-830 Member Posts: 5 New User

I bought an Iconia A1-830 refurbished.  I did the flash to 4.4.2 android using some app that Acer supplied.  The tablet will not recognize any device connected through the micro usb port (flash drive, keyboard, mouse) using a data cable.  I did not check to see if it worked before the OS upgrade. 

 

Running app "USB OTG Checker" showed "Your Device OS has USB OTG API".  However, checking for a signal gives an error "System NOT Detect USB OTG Signal".  Running app "USB Host Check" shows "android.hardware.usb.host.xml - OK" - "handheld_core_hardware.xml - USB host not enabled" - "tablet_core_hardware.xml - Not found".  Attempting to FIX with "USB Host Check" gives error "Could not start su process". 

 

The data cable works fine on another device, so I know it is good.  The USB port works fine for charging.  I don't know how to proceed from here.  Any suggestions?

Answers

  • IronFly
    IronFly ACE Posts: 18,413 Trailblazer
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    Interesting!
    I can confirm that on 4.2.2 OTG worked, at least on my device.

    Since i don't have anymore the 830, probably there's a bug on 4.4 KK.
    Another user is having your issue on the 810.

    About SU errror, it's normal since your OS is stock and not rooted.
    I'm not an Acer employee.
  • iconia-a1-830
    iconia-a1-830 Member Posts: 5 New User
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    If I go back to the factory settings, will the bios revert to 4.2 so I can try it that way?  I know next to nothing about this stuff.

  • IronFly
    IronFly ACE Posts: 18,413 Trailblazer
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    Nope, android never revert back to a previous version with factory reset; it just erase all your personal data/settings.

    I'm not an Acer employee.
  • iconia-a1-830
    iconia-a1-830 Member Posts: 5 New User
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    Is there a way to revert back to 4.2?

  • IronFly
    IronFly ACE Posts: 18,413 Trailblazer
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    not officially, sorry. Smiley Happy

    I'm not an Acer employee.
  • iconia-a1-830
    iconia-a1-830 Member Posts: 5 New User
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    Well that pretty much sucks.  I wish they would have warned me that I was cutting off a major functionality.  I guess all I can do now is hope they decide to fix the bug?

  • IronFly
    IronFly ACE Posts: 18,413 Trailblazer
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    if you are under warranty, you can give Acer support service a call and ask about the missing OTG support.

    maybe they will open a bug report.

    I'm not an Acer employee.
  • IronFly
    IronFly ACE Posts: 18,413 Trailblazer
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    I just got a suggestion to use the original USB OTG Acer cable, tested (not me) with KK and 830, worked.

    Part Number
    50.L0KN5.001
    Description
    CABLE USB A FEMALE TO USB B MICRO MALE 7IN. WHITE
    Part Number
    XZ.70200.194
    Description
    CABLE USB A FEMALE TO USB B MICRO MALE BLK

     

    Edited with correct codes.

    I'm not an Acer employee.
  • iconia-a1-830
    iconia-a1-830 Member Posts: 5 New User
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    Did they use some kind of adapter to go from a male to a female end to receive devices?  I thought they were wired differently, like pin 5 and 7 shorted, or something for a data cable.

  • IronFly
    IronFly ACE Posts: 18,413 Trailblazer
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    Uh, i don't know....i will ask.

    I'm not an Acer employee.
  • IronFly
    IronFly ACE Posts: 18,413 Trailblazer
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    Wrong code, sorry.

     

    this 2 are ok:

     

    Part Number
    50.L0KN5.001
    Description
    CABLE USB A FEMALE TO USB B MICRO MALE 7IN. WHITE
    Part Number
    XZ.70200.194
    Description
    CABLE USB A FEMALE TO USB B MICRO MALE BLK

     

    I'm not an Acer employee.