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I am running Ubuntu on my computer and I plugged in my tablet to flash TWRP to it. I enter adb devices and here is the output:

juniorRubyist@juniorRubyist-iMac:~$ adb devices
List of devices attached 
????????????    no permissions

...

Why is it doing this. I have a Kindle Fire 1st Generation, it says that it will ask to authorize ADB, but it will not. It has ADB enabled (I think) and everything.

Joseph
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  • It has ADB enabled (I think) How solid? – SarpSTA Jun 01 '16 at 19:40
  • @SarpSTA I read on Amazon that it is enabled by default. – Joseph Jun 01 '16 at 19:41
  • Can you check manually? – SarpSTA Jun 01 '16 at 19:56
  • Is there a way to disable and renable ADB? Sometimes I have to do that and unplug/replug in the device to get the authorization dialog to come up. – Austyn Mahoney Jun 01 '16 at 20:00
  • It's because of the USB device permissions being insufficient. Try adding a udev rule and see if that allows you to communicate with it. You may also need to add some lines to the android_usb.ini, if you have one. Running the ADB server on your PC as root is also an option, but not considered ideal. – eldarerathis Jun 01 '16 at 20:25
  • Please see How do I get my device detected by ADB on Linux? – and take care for the adb_usb.ini part. I had the same issue until then (also on Ubuntu). Also try to unplug/replug the cable (helped with some other devices here). – Izzy Jun 01 '16 at 22:46
  • @Izzy That article was perfect. I would like to give you the answered question. – Joseph Jun 02 '16 at 04:15
  • @juniorRubyist So it solved your issue? Shall we then mark your question as "duplicate" to that, redirecting there for the answer? // Yeah, unfortunately you can neither upvote nor accept the answer there, not enough rep yet. But you can upvote it later when you've collected some :) – Izzy Jun 02 '16 at 05:54
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    @Izzy Ok, that would be fine with me. I could upvote it later, plus, I only have 1 rep and this isn't my main SE. – Joseph Jun 02 '16 at 15:30

1 Answers1

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This is the same for me on Ubuntu. These commands should solve it:

sudo adb kill-server
sudo adb devices
Thomas Vos
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