kern/60036: plugging into usb-c port in thinkpad P51 does not attach devices

["mrg%eterna23.net@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60036
>Category:       kern
>Synopsis:       plugging into usb-c port in thinkpad P51 does not attach devices
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Feb 25 07:10:00 +0000 2026
>Originator:     matthew green
>Release:        -current
>Organization:
people's front against (bozotic) www (softwar foundation)
>Environment:
amd64 thinkpad P51
>Description:
when i plug a usb-c mp3 player into the usb-c port on the thinkpad P51
this happens:

[ 8942193.182462] acpi0: unhandled notify 0x00 for \_SB_.PCI0.RP05 (0xffff8426162c0248)
[ 8942193.182462] acpi0: unhandled notify 0x00 for \_SB_.PCI0.RP05 (0xffff8426162c0248)

and no USB appears.  power is delivered to the device (ie, it charges).
>How-To-Repeat:
try to umass(4) via the usb-c port on thinkpad P51.
>Fix: