Looks like the problem that was there for the AMD 7040 series still reproducible on new AI300 series when connecting the PD charger…
[ 182.552674] ucsi_acpi USBC000:00: con4: failed to register partner alt modes (-5)
[ 182.770530] ucsi_acpi USBC000:00: unknown error 0
[ 182.770543] ucsi_acpi USBC000:00: UCSI_GET_PDOS failed (-5)
[ 182.852731] ucsi_acpi USBC000:00: unknown error 0
[ 182.852746] ucsi_acpi USBC000:00: con4: failed to register partner alt modes (-5)
[ 183.108806] ucsi_acpi USBC000:00: unknown error 0
[ 183.108821] ucsi_acpi USBC000:00: UCSI_GET_PDOS failed (-5)
[ 183.201065] ucsi_acpi USBC000:00: unknown error 0
[ 183.201080] ucsi_acpi USBC000:00: con4: failed to register partner alt modes (-5)
It was solved by firmware update for FW16, but stock firmware for 300 series doesn’t have the fix 