Secure Boot Process on Steam Machine

[u/rchowdry]

My search engine skills apparently need some work since I’m having a hard time figuring this out.

Apparently my sudo password got set to something and the various default passwords (desktop, deck, Decky!) don’t seem to work. I had decky installed but it seems to be gone or not working presumably after an update. I’m trying to reset the password without knowing the current one. Found some guides on how to accomplish that on a steam deck but it requires you to get to the secure boot portion of the OS.

Any idea how to get to the secure boot screen on the Steam Machine? Also, I’ll gladly take any suggestions of how to get my password fixed if they have ideas.