# Failing to boot

Source: https://forum.modalai.com/topic/5253/failing-to-boot
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2026-06-09 18:33:25 UTC by John Keller
Replies: 1 · Views: 2105

## John Keller · 2026-06-09 18:33:25 UTC

I was using the voxl2 on my starling 2 drone out in the sun for a few hours on a ~80 F day. Commands which would normally be responsive like ros2 topic echoing, etc. were taking a long time to output any text so I thought it might be overheating and powered it off.

A few days later I tried turning it on and it doesn't boot up. I can't connect over adb shell. I get the following output from dmesg when plugging it in:

[31549.649340] usb 1-9: new high-speed USB device number 15 using xhci_hcd
[31549.800919] usb 1-9: New USB device found, idVendor=05c6, idProduct=900e, bcdDevice= 0.00
[31549.800933] usb 1-9: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[31549.800937] usb 1-9: Product: QUSB_BULK_SN:C67DF5D4
[31549.800941] usb 1-9: Manufacturer: Qualcomm CDMA Technologies MSM
[31549.800944] usb 1-9: SerialNumber: 22d3828

I see this in lsusb

Bus 001 Device 015: ID 05c6:900e Qualcomm, Inc. QUSB_BULK_SN:C67DF5D4

fastboot devices doesn't list anything.

Is there a way to fix or debug this? Thank you.

## Reply by Alex Kushleyev (ModalAI staff) · 2026-06-23 05:10:24 UTC

@John-Keller , please try https://docs.modalai.com/voxl2-unbricking/