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# Once completed, unplug/replug your device and it should come to life.
# Close the update widgets, and reconnect to your ChipWhisperer.
=== Linux usbserial module Workaround ===
There is an issue in some versions of Linux, where the SAM3U is not assigned a serial port when it enters bootloader mode. Here are some steps to resolve this issue (Note. this is not a permanent fix, you must go through these steps each time you put your ChipWhisperer into bootloader mode.). These steps assume you've already put ChipWhisperer into bootloader mode.
# Unplug your ChipWhisperer (Leave unplugged until instructed otherwise)
# Reboot your computer
# Once logged in again, open a terminal session
# Run this command: <code>sudo modprobe usbserial vendor=0x3eb product=0x6124</code>
# Plug your ChipWhisperer back in
# Check that a serial port is now open using: <code>ls -l /dev/ttyUSB*</code>
[[File:ttyUSB example.png|400px]]
You should now be able to program the bootloader from ChipWhisperer Capture through the port you created
=== Manual Update ===
If the above instructions fail, there is no big problem. The SAM3U chip contains a hardware-resident bootloader. You may need to follow instructions on the [[Manual SAM3U Firmware Update]] page (including using BOSSA) if you are unable to use the automatic system that is part of ChipWhisperer-Capture.