Upgrade Steam Deck BIOS from Ubuntu Linux

upgrade_bios.md

Note: This probably works from SteamOS Linux Desktop as well.

sudo apt-get install git
git clone https://gitlab.com/evlaV/jupiter-hw-support.git
cd jupiter-hw-support/usr/share/
for dir in jupiter*; do sudo ln -s $(realpath $dir) /usr/share/$dir; done
cd ~/jupiter-hw-support/
sudo ./usr/bin/jupiter-biosupdate check

Checking for BIOS updates
BIOS version: F7A0114
Desired version: F7A0116
F7A0116
Updates available, not applying in check mode

sudo /usr/share/jupiter_bios_updater/h2offt ~/biosbkp.fd -O

Read file successfully.  (path="~/jupiter-hw-support/usr/share/jupiter_bios_updater/platform.ini")
Read file successfully.  (path="~/jupiter-hw-support/usr/share/jupiter_bios_updater/msg_eng.ini")


         Insyde H2OFFT (Flash Firmware Tool) Version (SEG) 200.01.00.10
      Copyright(c) 2012 - 2020, Insyde Software Corp. All Rights Reserved.


                        Read current ROM start!
[================] Reading Block at FFFFF000h (100%)
                        Read ROM Complete

                        Save ROM file ~/biosbkp.fd Complete!

NOTE: Copy the backup file to a usb stick or similar

sudo ./usr/bin/jupiter-biosupdate

Performing BIOS updates
BIOS version: F7A0114
Desired version: F7A0116
Running:  '/usr/share/jupiter_bios_updater/h2offt' '/usr/share/jupiter_bios/F7A0116_sign.fd' '-all' '-AC' '-N'
Read file successfully.  (path="platform.ini")
Read file successfully.  (path="msg_eng.ini")


         Insyde H2OFFT (Flash Firmware Tool) Version (SEG) 200.01.00.10
      Copyright(c) 2012 - 2020, Insyde Software Corp. All Rights Reserved.


                        Initializing

               Current BIOS Model name: CHACHANI-VANGOGH
               New     BIOS Model name: CHACHANI-VANGOGH

               Current BIOS version: F7A0114
               New     BIOS version: F7A0116


Will apply bios update to version F7A0116 after reboot

Reboot, select Ubuntu from the boot menu. Wait for the bios update to apply.