fastboot and adb not working with sudo

Instead of forcing permissions via sudo each time you need to run fastboot, you can permanently fix the issue:

1. use lsusb to identify your device USB VendorID
2. configure udev to set proper permissions when your device is plugged in
3. profit!

As a bonus - it will be fixed for adb too.

For example, in my case (for 'Megafon SP-A20i') :

$ fastboot devicesno permissions  fastboot$ sudo fastboot devices[sudo] password for kaa: MedfieldA9055F28    fastboot$ 

Let's fix:

First, we need to identify the device:

a) look for usb bus number (hack: I know the device is Intel-based one)

$ fastboot -l devicesno permissions         fastboot usb:1-1.2$ lsusb |grep 001 |grep -i intelBus 001 Device 044: ID 8087:09ef Intel Corp. Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub$ 

b) look for other Intel devices:

$ lsusb |grep 8087Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching HubBus 001 Device 044: ID 8087:09ef Intel Corp. Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub$ 

Hubs are not smartphones definetely, so - USB vendorID we need is "8087".

Second, configure udev (you must replace "idVendor" value with yours) :

$ sudo sh -c "echo '# Megafon SP-A20i' >> /etc/udev/rules.d/51-android.rules"$ sudo sh -c "echo 'SUBSYSTEM==\"usb\", ATTR{idVendor}==\"8087\", MODE=\"0666\", GROUP=\"plugdev\"' >> /etc/udev/rules.d/51-android.rules"$ sudo service udev restartudev stop/waitingudev  start/running, process 1821$ 

Third, re-plug your device to allow udev to perform it's magic.

Final check:

$ fastboot -l devicesMedfieldA9055F28       fastboot usb:1-1.2$ adb devicesList of devices attached $ fastboot rebootrebooting...finished. total time: 0.253s$ sleep 90$ adb devicesList of devices attached MedfieldA9055F28    device$ 

Voila!

You can use

sudo $(which fastboot) devices