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March 7th, 2025 14:53

Power delivery errors on Linux after BIOS update

After updating to BIOS version 1.29.0 from 1.27.1 I see the following errors on Linux in dmesg every time the charger is connected to any of the USB ports:

[ 1049.293343] ucsi_acpi USBC000:00: unknown error 0[ 1049.293352] ucsi_acpi USBC000:00: UCSI_GET_PDOS failed (-5)

This is observable on Arch Linux running kernel 6.12.17.

The laptop seems to work and charge fine.

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March 7th, 2025 14:55

Observable on two machines: XPS 9520 one with i5 12500h and second with i7 12700h.

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