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Message-ID: <2167318.tdWV9SEqCh@arborvitaetree>
Date: Wed, 26 Nov 2025 11:01:24 -0500
From: Stephanie Gawroriski <xerthesquirrel@...il.com>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: Linux 6.18-rc6
Hi!
On Monday, 24 November 2025 04:50:03 EST Heikki Krogerus wrote:
> I'm still trying to figure this out, but let's rule out one of my
> concerns..
>
> Can you check are the symlinks pointing to the correct USB devices
> under /sys/class/typec ?
>
> It's probable easiest with just one USB device connected to the
> system. With one USB device connected to the system there should be
> only one partner under /sys/class/typec (for example port0-partner),
> so it should be easy to check if the symlink under that partner
> device is pointing to the correct USB device.
>
> % ls -la /sys/class/typec/port<x>-partner/
>
> You should see a symlink to an USB device under it. Can you check if
> it's the correct USB device?
>
> If it's not the correct USB device, then the ACPI table may have wrong
> _PLD (Physical Location of Device) objects for these USB port or USB
> Type-C connector device nodes. The code uses the _PLD to link the
> correct USB port to the USB Type-C connector.
>
> thanks,
The USB-C cable is plugged into the connector that is furthest to the back of
the device. Bus 2 and Bus 3 are connected to the same port, the ethernet
controller is connected to the dock, so I am guessing that it is using the
USB-only interface of the USB-C port, not sure why it would be not under Bus
3?
These are the outputs along with the USB and PCI tree:
stephanie@...orvitaetree:~$ ls -la /sys/class/typec/port1-partner/
total 0
drwxr-xr-x 4 root root 0 Nov 26 10:30 .
drwxr-xr-x 8 root root 0 Nov 24 15:14 ..
lrwxrwxrwx 1 root root 0 Nov 26 10:30 2-3 -> ../../../../../
pci0000:00/0000:00:0d.0/usb2/2-3
lrwxrwxrwx 1 root root 0 Nov 26 10:30 3-3 -> ../../../../../
pci0000:00/0000:00:14.0/usb3/3-3
-r--r--r-- 1 root root 4096 Nov 26 10:30 accessory_mode
lrwxrwxrwx 1 root root 0 Nov 25 23:42 device -> ../../port1
-r--r--r-- 1 root root 4096 Nov 26 10:30 number_of_alternate_modes
drwxr-xr-x 5 root root 0 Nov 25 23:42 pd2
drwxr-xr-x 2 root root 0 Nov 26 10:29 power
lrwxrwxrwx 1 root root 0 Nov 25 23:42 subsystem -> ../../../../../../class/
typec
-r--r--r-- 1 root root 4096 Nov 26 10:30 supports_usb_power_delivery
-rw-r--r-- 1 root root 4096 Nov 25 23:42 uevent
-r--r--r-- 1 root root 4096 Nov 26 10:30 usb_mode
lrwxrwxrwx 1 root root 0 Nov 26 10:30 usb_power_delivery -> pd2
-r--r--r-- 1 root root 4096 Nov 26 10:30 usb_power_delivery_revision
stephanie@...orvitaetree:/sys/class/typec$ lsusb -tv
/: Bus 001.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/1p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
/: Bus 002.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 20000M/x2
ID 1d6b:0003 Linux Foundation 3.0 root hub
|__ Port 003: Dev 005, If 0, Class=Hub, Driver=hub/4p, 10000M
ID 8087:0b40 Intel Corp.
|__ Port 004: Dev 006, If 0, Class=Hub, Driver=hub/4p, 10000M
ID 2109:0822 VIA Labs, Inc.
|__ Port 002: Dev 007, If 0, Class=Communications, Driver=cdc_ncm,
5000M
ID 0b95:1790 ASIX Electronics Corp. AX88179 Gigabit Ethernet
|__ Port 002: Dev 007, If 1, Class=CDC Data, Driver=cdc_ncm, 5000M
ID 0b95:1790 ASIX Electronics Corp. AX88179 Gigabit Ethernet
/: Bus 003.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/12p, 480M
ID 1d6b:0002 Linux Foundation 2.0 root hub
|__ Port 003: Dev 023, If 0, Class=Hub, Driver=hub/6p, 480M
ID 1d5c:5801 Fresco Logic
|__ Port 001: Dev 024, If 0, Class=Billboard, Driver=[none], 1.5M
ID 291a:87e0
|__ Port 004: Dev 025, If 0, Class=Hub, Driver=hub/4p, 480M
ID 2109:2822 VIA Labs, Inc.
|__ Port 001: Dev 027, If 0, Class=Hub, Driver=hub/4p, 480M
ID 1a40:0101 Terminus Technology Inc. Hub
|__ Port 001: Dev 028, If 0, Class=Human Interface Device,
Driver=usbhid, 1.5M
ID 17ef:608d Lenovo Optical Mouse
|__ Port 002: Dev 029, If 0, Class=Human Interface Device,
Driver=usbhid, 12M
ID 0c45:7692 Microdia
|__ Port 002: Dev 029, If 1, Class=Human Interface Device,
Driver=usbhid, 12M
ID 0c45:7692 Microdia
|__ Port 004: Dev 030, If 0, Class=Video, Driver=uvcvideo,
480M
ID 17ef:4836 Lenovo
|__ Port 004: Dev 030, If 1, Class=Video, Driver=uvcvideo,
480M
ID 17ef:4836 Lenovo
|__ Port 004: Dev 030, If 2, Class=Audio, Driver=snd-usb-
audio, 480M
ID 17ef:4836 Lenovo
|__ Port 004: Dev 030, If 3, Class=Audio, Driver=snd-usb-
audio, 480M
ID 17ef:4836 Lenovo
|__ Port 005: Dev 026, If 0, Class=Billboard, Driver=[none], 12M
ID 2eb9:0123
|__ Port 005: Dev 026, If 1, Class=Vendor Specific Class,
Driver=[none], 12M
ID 2eb9:0123
|__ Port 006: Dev 022, If 0, Class=Vendor Specific Class, Driver=[none],
12M
ID 06cb:00fc Synaptics, Inc. Prometheus Fingerprint Reader
|__ Port 008: Dev 003, If 0, Class=Video, Driver=uvcvideo, 480M
ID 30c9:0051 Luxvisions Innotech Limited
|__ Port 008: Dev 003, If 1, Class=Video, Driver=uvcvideo, 480M
ID 30c9:0051 Luxvisions Innotech Limited
|__ Port 008: Dev 003, If 2, Class=Application Specific Interface,
Driver=[none], 480M
ID 30c9:0051 Luxvisions Innotech Limited
|__ Port 010: Dev 004, If 0, Class=Wireless, Driver=btusb, 12M
ID 8087:0033 Intel Corp. AX211 Bluetooth
|__ Port 010: Dev 004, If 1, Class=Wireless, Driver=btusb, 12M
ID 8087:0033 Intel Corp. AX211 Bluetooth
/: Bus 004.Port 001: Dev 001, Class=root_hub, Driver=xhci_hcd/4p, 10000M
ID 1d6b:0003 Linux Foundation 3.0 root hub
stephanie@...orvitaetree:/sys/class/typec$ lspci -tv -nn
-[0000:00]-+-00.0 Intel Corporation Raptor Lake-P 6p+8e cores Host Bridge/
DRAM Controller [8086:a706]
+-02.0 Intel Corporation Raptor Lake-P [Iris Xe Graphics]
[8086:a7a0]
+-04.0 Intel Corporation Raptor Lake Dynamic Platform and Thermal
Framework Processor Participant [8086:a71d]
+-06.0-[04]----00.0 Sandisk Corp WD Blue SN5000 NVMe SSD (DRAM-
less) [15b7:504a]
+-07.0-[20-49]--
+-07.2-[50-79]----00.0-[51-79]--+-00.0-[52]--
| +-01.0-[53-5f]--
| +-02.0-[60-6c]--
| +-03.0-[6d-78]--
| \-04.0-[79]--
+-08.0 Intel Corporation GNA Scoring Accelerator module
[8086:a74f]
+-0a.0 Intel Corporation Raptor Lake Crashlog and Telemetry
[8086:a77d]
+-0d.0 Intel Corporation Raptor Lake-P Thunderbolt 4 USB
Controller [8086:a71e]
+-0d.2 Intel Corporation Raptor Lake-P Thunderbolt 4 NHI #0
[8086:a73e]
+-0d.3 Intel Corporation Raptor Lake-P Thunderbolt 4 NHI #1
[8086:a76d]
+-12.0 Intel Corporation Alder Lake-P Integrated Sensor Hub
[8086:51fc]
+-14.0 Intel Corporation Alder Lake PCH USB 3.2 xHCI Host
Controller [8086:51ed]
+-14.2 Intel Corporation Alder Lake PCH Shared SRAM [8086:51ef]
+-14.3 Intel Corporation Raptor Lake PCH CNVi WiFi [8086:51f1]
+-15.0 Intel Corporation Alder Lake PCH Serial IO I2C Controller
#0 [8086:51e8]
+-15.1 Intel Corporation Alder Lake PCH Serial IO I2C Controller
#1 [8086:51e9]
+-16.0 Intel Corporation Alder Lake PCH HECI Controller
[8086:51e0]
+-1c.0-[08]----00.0 Intel Corporation XMM7560 LTE Advanced Pro
Modem [8086:7560]
+-1f.0 Intel Corporation Raptor Lake LPC/eSPI Controller
[8086:519d]
+-1f.3 Intel Corporation Raptor Lake-P/U/H cAVS [8086:51ca]
+-1f.4 Intel Corporation Alder Lake PCH-P SMBus Host Controller
[8086:51a3]
\-1f.5 Intel Corporation Alder Lake-P PCH SPI Controller
[8086:51a4]
stephanie@...orvitaetree:/sys/class/typec$ ls -w 1 port0/
data_role
device
firmware_node
physical_location
port0.0
port0.1
port0.2
power
power_operation_mode
power_role
preferred_role
subsystem
supported_accessory_modes
uevent
usb2-port1
usb3-port1
usb4_port1
usb_capability
usb_power_delivery
usb_power_delivery_revision
usb_typec_revision
vconn_source
waiting_for_supplier
stephanie@...orvitaetree:/sys/class/typec$ ls -w 1 port1/
data_role
device
firmware_node
physical_location
port1.0
port1.1
port1.2
port1-partner
power
power_operation_mode
power_role
preferred_role
subsystem
supported_accessory_modes
uevent
usb2-port3
usb3-port3
usb4_port7
usb_capability
usb_power_delivery
usb_power_delivery_revision
usb_typec_revision
vconn_source
waiting_for_supplier
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