bay-trail tablet battery&power supply problems.

Kernels & Hardware, configuring network, installing services

bay-trail tablet battery&power supply problems.

Postby jan » 2020-07-29 21:42

Hi,

i'm running debian 10 x64 on a Archos bay-trail tablet pc.

i managed to get most hardware working and the device works very good, its really snappy for a 70€ intel tablet(back in the days).

the only problem is the battery and powersupply not showing up and i'm running out of battery without knowing. i'm currently running 5.6 kernel and tested a couple of things but nothing works.
the devices charges via a usb micro port.

    there is nothing in the /sys/class/power_supply, and no battery found in /sys/class/


      -lshw gives me this... :

      *-battery
      description: Lithium Ion Battery
      product: SR Real Battery
      vendor: Intel SR 1
      physical id: 1
      version: Date
      serial: 123456789
      slot: I2C2
      configuration: voltage=3.8V
      *-power UNCLAIMED
      description: OEM_Define1
      product: OEM_Define5
      vendor: OEM_Define2
      physical id: 2
      version: OEM_Define6
      serial: OEM_Define3
      capacity: 42mWh
    so i tried to use i2cdump to show more about. the i2c-2 interface

      sudo i2cdetect -l

      i2c-3 i2c Synopsys DesignWare I2C adapter I2C adapter
      i2c-10 i2c i915 gmbus dpd I2C adapter
      i2c-1 i2c Synopsys DesignWare I2C adapter I2C adapter
      i2c-8 i2c i915 gmbus dpc I2C adapter
      i2c-6 i2c i915 gmbus vga I2C adapter
      i2c-4 i2c Synopsys DesignWare I2C adapter I2C adapter
      i2c-11 i2c DPDDC-B I2C adapter
      i2c-2 i2c Synopsys DesignWare I2C adapter I2C adapter
      i2c-0 i2c Synopsys DesignWare I2C adapter I2C adapter
      i2c-9 i2c i915 gmbus dpb I2C adapter
      i2c-7 i2c i915 gmbus panel I2C adapter
      i2c-5 i2c i915 gmbus ssc I2C adapter
      i2c-12 i2c DPDDC-C I2C adapter

      sudo i2cdump -y 2 0x0b

      No size specified (using byte-data access)
      0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef
      00: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
      10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
      20: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
      30: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
      40: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
      50: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
      60: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
      70: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
      80: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
      90: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
      a0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
      b0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
      c0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
      d0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
      e0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX
      f0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX

    current kernel(backports):

    Debian 5.6.14-2~bpo10+1 (2020-06-09) x86_64



    any help or tips are welcome i'm stuck for a couple of days trying to figure this out.

    regards Jan
    jan
     
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    Re: bay-trail tablet battery&power supply problems.

    Postby pylkko » 2020-08-07 04:58

    only thing that comes to mind is that the hardware might be supported in later kernels. there is no guarantee, of course, but you should try 5.8 and 5.9
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    Re: bay-trail tablet battery&power supply problems.

    Postby jan » 2020-08-09 17:14

    hi thx for the reply. i will test a couple a new kernels. i have found some articles about this type of battery/power-controller, its also found in some other tablet like Lenovo but with usb-c, mine has usb-b micro.
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    Re: bay-trail tablet battery&power supply problems.

    Postby cuckooflew » 2020-08-09 17:59

    the only problem is the battery and powersupply not showing up and i'm running out of battery without knowing.


    For just the battery, try : https://packages.debian.org/buster/xbattbar
    Display battery status in X11

    Xbattbar displays the current (laptop) battery status in the X window environment. Battery status is obtained through the APM interface.

    The battery indicator of this program is very simple: a simple bar at the top/bottom of your display. With its color, it indicates the AC-line status (plugged in or off-line), and battery charging/remaining level. Also, if the mouse cursor enters the indicator window, a popup diagnosis window comes up in the center of your display showing the current AC line status and battery level.

    This package supports ACPI and APM checks for battery status.

    You start in from a CLI terminal, on Unix/BSD systems 'Xbatt' but on Debian maybe 'Xbattbar' will be needed.
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    Re: bay-trail tablet battery&power supply problems.

    Postby pylkko » 2020-08-09 19:56

    May be of interest:

    https://bugzilla.redhat.com/show_bug.cgi?id=1791098

    In your i2c read, I believe you need to first set up the read before you read (write some registers to set up the communication on the bus), by sending the bytes addresses and read. At least microcontrollers discussing with peripherals over i2c-related protocols, there are separate commands that setup the read, then you read and get back a value that you should be able to interpret if you have the manual
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    Re: bay-trail tablet battery&power supply problems.

    Postby jan » 2020-08-28 20:24

    thx cuckooflew for the idea but the problem is hardware/driver related.


    thx pylkko i have been trying to do some more I2c tests but its not working out for me, i installed latest kernel (5.7) but it does not fix the battery problem.
    cpu throttling works better with the lastet kernel.
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