Steam Deck gets stuck Logo on first boot and between mode changes returns to Plasma login.

I've downloaded the latest ISO installation _cachyos-handheld-linux-260426_. After a successful live usb boot and installation, the following symptoms happen

- The Deck passes the Limine screen and it gets stuck at the Steam Deck Logo. I waited 15 minutes and nothing else happens.
- After pressing any key in the USB keyboard, the Deck shuts down and starts again. This time it shows the Plasma Login.
- After entering the password, the desktop mode opens and everything, including Steam charges and asks for login.
- When the _Return to Game Mode_ is pressed, it looks like it's going to change with a black screen, but it's just returning to Plasma Login again.
- I've tried commands like **steamos-session-select oneshot** and **steamos-session-select gamescope** but the result is the same.
- Trying with systemd-boot didn't work also.
- Full name and username fields at the installation were different than the defaults.

What can be done to solve it? I was expecting a normal first boot like default SteamOS asking for login.
Thanks.

Reproduce the first boot and mode-switch sequence on the Steam Deck, starting with the Limine or systemd-boot path and the steamos-session-select commands mentioned in the report. Compare the Plasma Login behavior after installation and after Return to Game Mode; done means the installed system reaches Game Mode and switches between modes without returning to the login screen.

Written by the indexing model from the issue text.