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[BQ] no permission using adb

 

Hi all,

I have a BQ phone. and when I use it with usb tethering enabled through

$ adb shell android-gadget-service enable rndis

I have to maintain the display on because when the display turns off I
haven't access to the phone via adb anymore

$ adb devices

returns

List of devices attached
???????????? no permissions

I don't be able to recover the access neither if I kill and restart adb
server with

$ adb kill-server
$ adb start-server

Some suggestions?

ciao
alberto

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