Fastboot command returns a list of question marks

by Francisco   Last Updated February 13, 2018 14:11 PM

I am trying to root an Acer Iconia Tab A200 tablet using a script. I have adb working and fastboot works too, however, command fastboot devices returns a list of question marks. Eg:

???????????? fastboot

Image ilustrates the steps followed and the result:fastboot

I execute command fastboot devices in the bootloader which is already unlocked. Using Ubuntu 14.04. udev settings are already set (the file with vendors IDs).

What can I do to get the correct result? How can I make fastboot work well?

Thanks in advance!



Answers 1


It can be a cable fault. Change the cable. In my Redmi 3 on a cable from old Xperia P i've had question marks, replaced the cable to a newer cable from Redmi Note 2 and voila - the correct number displays instead of the question marks.

Silver
Silver
February 13, 2018 13:23 PM

Related Questions


fastboot doesn't see device

Updated June 03, 2015 03:04 AM

How to flash root.zip in fastboot

Updated April 14, 2015 20:04 PM

LG - Fastboot doesn't recognize my device

Updated November 17, 2017 07:11 AM

What is CSC Fastboot Mode, and how to get rid of it?

Updated November 30, 2017 15:11 PM

Asus memopad7 170C, unlocking bootloader fails

Updated June 11, 2015 06:44 AM