I am running an Ubuntu 14 host machine on my PC and recently I got an Eragon 820 Development kit which is running on Android Marshmallow, everything was working fine until I click the factory reset option in the Android settings.
After that the adb / fastboot neither working and In the Dmesg am getting like this
[ 308.326141] usb 2-1.3: new high-speed USB device number 18 using ehci-pci [ 308.420065] usb 2-1.3: New USB device found, idVendor=18d1, idProduct=d001 [ 308.420072] usb 2-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 308.420076] usb 2-1.3: Product: MSM8996 for arm64 [ 308.420079] usb 2-1.3: Manufacturer: unknown [ 308.420083] usb 2-1.3: SerialNumber: 77a941ec [ 310.055562] usb 2-1.3: usbfs: USBDEVFS_CONTROL failed cmd adb rqt 128 rq 6 len 256 ret -110 [ 311.971228] usb 2-1.3: USB disconnect, device number 18
these same 8 lines keep on repeating (i.e. the device connects, is recognized, some
adb rqt… fails, device is disconnected again).
Anyone know how to fix this issue?