[8.9" Kindle Fire HD Q&A, Help & Troubleshooting] kevin_405:
Looks like dmesg has some error statements after i put it to fastboot mode. Not sure what it means

[ 457.028880] usb 3-3: >device descriptor read/8, error -71

[ 457.148762] usb 3-3: >device descriptor read/8, error -71

I have attached the complete output in the attachments including a lsusb -v output

lsusb output

Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub

Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub

Bus 003 Device 007: ID 1949:0008 Lab126

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 001 Device 003: ID 13d3:5188 IMC Networks

Bus 001 Device 004: ID 03eb:8417 Atmel Corp.

dmesg output

[ 336.727802] usb 3-3: >New USB device found, idVendor=1949, idProduct=0008

[ 336.727815] usb 3-3: >New USB device strings: Mfr=5, Product=1, SerialNumber=2

[ 336.727820] usb 3-3: >Product: Jem-PVT-Prod-04

[ 336.727824] usb 3-3: >Manufacturer: Texas Instruments

[ 336.727827] usb 3-3: >SerialNumber: 5FA2000040002FFF

[ 336.728560] usb 3-3: >ep 0x81 - rounding interval to 32768 microframes, ep desc says 0 microframes

[ 336.728572] usb 3-3: >ep 0x1 - rounding interval to 32768 microframes, ep desc says 0 microframes

[ 339.209337] usb 3-3: >USB disconnect, device number 3

[ 349.330783] usb 3-3: >new high-speed USB device number 4 using xhci_hcd

[ 349.357003] usb 3-3: >New USB device found, idVendor=1949, idProduct=0008

[ 349.357013] usb 3-3: >New USB device strings: Mfr=2, Product=3, SerialNumber=4

[ 349.357016] usb 3-3: >Product: Kindle

[ 349.357018] usb 3-3: >Manufacturer: Amazon

[ 349.357020] usb 3-3: >SerialNumber: B0C9100424870NEP

[ 349.357628] usb 3-3: >ep 0x81 - rounding interval to 32768 microframes, ep desc says 0 microframes

[ 349.357639] usb 3-3: >ep 0x1 - rounding interval to 32768 microframes, ep desc says 0 microframes

[ 391.548583] usb 3-3: >USB disconnect, device number 4

[ 391.913265] usb 3-3: >new high-speed USB device number 5 using xhci_hcd

[ 391.935540] usb 3-3: >New USB device found, idVendor=1949, idProduct=0008

[ 391.935547] usb 3-3: >New USB device strings: Mfr=2, Product=3, SerialNumber=4

[ 391.935551] usb 3-3: >Product: Kindle

[ 391.935554] usb 3-3: >Manufacturer: Amazon

[ 391.935556] usb 3-3: >SerialNumber: B0C9100424870NEP

[ 391.935871] usb 3-3: >ep 0x81 - rounding interval to 32768 microframes, ep desc says 0 microframes

[ 391.935878] usb 3-3: >ep 0x2 - rounding interval to 32768 microframes, ep desc says 0 microframes

[ 391.935884] usb 3-3: >ep 0x83 - rounding interval to 32768 microframes, ep desc says 0 microframes

[ 391.935890] usb 3-3: >ep 0x3 - rounding interval to 32768 microframes, ep desc says 0 microframes

[ 452.776441] usb 3-3: >USB disconnect, device number 5

[ 456.872640] usb 3-3: >new high-speed USB device number 6 using xhci_hcd

[ 457.028880] usb 3-3: >device descriptor read/8, error -71

[ 457.148762] usb 3-3: >device descriptor read/8, error -71

[ 457.364566] usb 3-3: >new high-speed USB device number 7 using xhci_hcd

[ 457.382406] usb 3-3: >New USB device found, idVendor=1949, idProduct=0008

[ 457.382415] usb 3-3: >New USB device strings: Mfr=5, Product=1, SerialNumber=2

[ 457.382421] usb 3-3: >Product: Jem-PVT-Prod-04

[ 457.382425] usb 3-3: >Manufacturer: Texas Instruments

[ 457.382429] usb 3-3: >SerialNumber: 5FA2000040002FFF

[ 457.383102] usb 3-3: >ep 0x81 - rounding interval to 32768 microframes, ep desc says 0 microframes

[ 457.383118] usb 3-3: >ep 0x1 - rounding interval to 32768 microframes, ep desc says 0 microframes