Ucsi_acpi USBC000:00: UCSI_GET_PDOS failed (-5)

[kirelagin]

I don’t think this error is actually important. I am getting the same error on my first-gen-AMD FW13, but the cause of my TB4 monitor not working was a kernel bug fixed in 6.16:

[Resolved] FW laptop not detecting a Thunderbolt device

Hi, This is just a general note. If you are finding that Thunderbolt devices are not appearing when you plug them in. In linux, try “lspci”. If the thunderbolt device then appears, it is due to a kernel bug. I found this happen with Linux kernel 6.15.4. The fix is detailed here: I found this very useful to know when I was diagnosing a problem recently.