4.1 jelly bean - How do I enable USB tethering on a JellyBean device?

Does JellyBean support USB tether?

Is there a way compile the JB source so USB tether is always enabled? I would like to have the support through the OS and not depend on an App.

Answer

I successfully got native USB tethering working on the Nexus 7 with Jelly Bean.

Modify the device/asus/grouper/overlay/frameworks/base/core/res/res/values/config.xml to be the following:

    
    true


    
    true

    
    false

    
    true

    
    

    7
    94
    208
    458
    2223
    

    
    
    10
    35
    55
    70
    70
    250
    


    
    
    255
    255
    255
    0
    0

    0
    

    
    
    0

    0
    0
    0
    0
    0
    

    
    10


    
    com.android.wallpaper/.nexus.NexusWallpaper

    0
    1

    
    #ffffffff


    
    9000

    
    com.google.android.location

    
    com.google.android.location

    

    
    
    

    
    
    "wifi,1,1,1,-1,true"
    "mobile,0,0,0,-1,true"
    "mobile_mms,2,0,2,60000,true"
    "mobile_supl,3,0,2,60000,true"
    "mobile_dun,4,0,4,60000,true"
    "mobile_hipri,5,0,3,60000,true"
    "bluetooth,7,7,0,-1,true"
    


    
    
    
    "1,1"
    "0,1"
    "7,1"

    

    
    
    "rndis0"
    

    

    
    
    
    0
    1
    5
    7
    

    
    
    "wlan0"
    

    
    

    "bnep\\d"
    

    
    
    30
    

    
    

    1
    

    
    true


    
    
    true


    
    250

    

    false

    false

    
    -12




    /dev/bus/usb/001

    

true

Modify out/target/product/grouper/root/init.usb.rc to be the following:

# Copyright (C) 2012 The Android Open Source Project

#
# USB configuration common for all android devices
#

on post-fs-data
    chown system system /sys/class/android_usb/android0/f_mass_storage/lun/file
    chmod 0660 /sys/class/android_usb/android0/f_mass_storage/lun/file
    chown system system /sys/class/android_usb/android0/f_rndis/ethaddr
    chmod 0660 /sys/class/android_usb/android0/f_rndis/ethaddr


# Used to disable USB when switching states
on property:sys.usb.config=none
    stop adbd
    write /sys/class/android_usb/android0/enable 0
    write /sys/class/android_usb/android0/bDeviceClass 0
    setprop sys.usb.state ${sys.usb.config}

# adb only USB configuration
# This should only be used during device bringup
# and as a fallback if the USB manager fails to set a standard configuration

on property:sys.usb.config=adb
    write /sys/class/android_usb/android0/enable 0
    write /sys/class/android_usb/android0/idVendor 18d1
    write /sys/class/android_usb/android0/idProduct D002
    write /sys/class/android_usb/android0/functions ${sys.usb.config}
    write /sys/class/android_usb/android0/enable 1
    start adbd
    setprop sys.usb.state ${sys.usb.config}

# USB accessory configuration

on property:sys.usb.config=accessory
    write /sys/class/android_usb/android0/enable 0
    write /sys/class/android_usb/android0/idVendor 18d1
    write /sys/class/android_usb/android0/idProduct 2d00
    write /sys/class/android_usb/android0/functions ${sys.usb.config}
    write /sys/class/android_usb/android0/enable 1
    setprop sys.usb.state ${sys.usb.config}

# USB accessory configuration, with adb
on property:sys.usb.config=accessory,adb

    write /sys/class/android_usb/android0/enable 0
    write /sys/class/android_usb/android0/idVendor 18d1
    write /sys/class/android_usb/android0/idProduct 2d01
    write /sys/class/android_usb/android0/functions ${sys.usb.config}
    write /sys/class/android_usb/android0/enable 1
    start adbd
    setprop sys.usb.state ${sys.usb.config}

# audio accessory configuration
on property:sys.usb.config=audio_source

    write /sys/class/android_usb/android0/enable 0
    write /sys/class/android_usb/android0/idVendor 18d1
    write /sys/class/android_usb/android0/idProduct 2d02
    write /sys/class/android_usb/android0/functions ${sys.usb.config}
    write /sys/class/android_usb/android0/enable 1
    setprop sys.usb.state ${sys.usb.config}

# audio accessory configuration, with adb
on property:sys.usb.config=audio_source,adb
    write /sys/class/android_usb/android0/enable 0

    write /sys/class/android_usb/android0/idVendor 18d1
    write /sys/class/android_usb/android0/idProduct 2d03
    write /sys/class/android_usb/android0/functions ${sys.usb.config}
    write /sys/class/android_usb/android0/enable 1
    start adbd
    setprop sys.usb.state ${sys.usb.config}

# USB and audio accessory configuration
on property:sys.usb.config=accessory,audio_source
    write /sys/class/android_usb/android0/enable 0

    write /sys/class/android_usb/android0/idVendor 18d1
    write /sys/class/android_usb/android0/idProduct 2d04
    write /sys/class/android_usb/android0/functions ${sys.usb.config}
    write /sys/class/android_usb/android0/enable 1
    setprop sys.usb.state ${sys.usb.config}

# USB and audio accessory configuration, with adb
on property:sys.usb.config=accessory,audio_source,adb
    write /sys/class/android_usb/android0/enable 0
    write /sys/class/android_usb/android0/idVendor 18d1

    write /sys/class/android_usb/android0/idProduct 2d05
    write /sys/class/android_usb/android0/functions ${sys.usb.config}
    write /sys/class/android_usb/android0/enable 1
    start adbd
    setprop sys.usb.state ${sys.usb.config}

# Used to set USB configuration at boot and to switch the configuration
# when changing the default configuration
on property:persist.sys.usb.config=*
    setprop sys.usb.config ${persist.sys.usb.config}


on property:sys.usb.config=rndis
    write /sys/class/android_usb/android0/enable 0
    write /sys/class/android_usb/android0/idVendor 18d1
    write /sys/class/android_usb/android0/idProduct 4e23
    write /sys/class/android_usb/android0/functions ${sys.usb.config}
    write /sys/class/android_usb/android0/bDeviceClass 224
    write /sys/class/android_usb/android0/enable 1
    setprop sys.usb.state ${sys.usb.config}


on property:sys.usb.config=rndis,adb
    write /sys/class/android_usb/android0/enable 0
    write /sys/class/android_usb/android0/idVendor 18d1
    write /sys/class/android_usb/android0/idProduct 4e24
    write /sys/class/android_usb/android0/functions ${sys.usb.config}
    write /sys/class/android_usb/android0/bDeviceClass 224
    write /sys/class/android_usb/android0/enable 1
    start adbd
    setprop sys.usb.state ${sys.usb.config}

And use a modified tegra kernel that has RNDIS enabled.

Please reference this XDA post