[Bug 270707] Installer media doesn't boot on Thinkpad T14s Gen 3 (Ryzen 7 Pro 6850U)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=270707

Matthias Lanter <freebsd@lanter-it.ch> changed:

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--- Comment #27 from Matthias Lanter <freebsd@lanter-it.ch> ---
After my T14 Gen 3 <https://bsd-hardware.info/?probe=0a2c02f944> stopped
working after the BIOS update last November and Lenovo replaced the mainboard
twice, I can now use it again for FreeBSD tests.

Even with yesterday's snapshot, the boot process hangs at the same point.

I get to the installer, but the built-in keyboard does not work with:
set hint.uart.1.disabled="1" 

On the boot screen the keyboard is working fine. No problems with Windows 10
and Debian 12.

I can only get further with a USB keyboard.

Additional information on the BIOS version:
Lenovo does not seem to have a lucky hand with the BIOS versions. The replaced
mainboard had v1.47. Version 1.49 was then temporary available on January 8,
but was also withdrawn. But I was quicker and so this one is now running.

I am available for further tests.

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