On 12/17/23 11:21, Yaroslav Isakov wrote:
Hello! I recently bought Thinkpad T14 Gen 4 AMD laptop, and I
installed Gentoo on it, with kernel 6.6.4.
Even though type-c ports seems to be working (I checked usb3 flash
stick, lenovo charger, Jabra headset, Yubikey), I cannot see any
devices in /sys/class/(typec,typec_mux,usb_power_delivery).
There are no messages in dmesg at all, mentioning typec. I can see
that modules typec_ucsi, ucsi_acpi, thunderbolt are loaded. I can see
that device TYPEC000 is present on acpi bus, there are files in
/sys/bus/acpi/devices/USBC000:00, but, there is no driver linked in
it.
I tried to recompile module ucsi_acpi, with adding { "USBC000", 0 }
to ucsi_acpi_match, but it did not change anything (except that in
modinfo of this module, USBC000 is now seen.
I tried to decompile SSDT1 table, which has definition of USBC, but
there is nothing in it, which is supicious.
What else can I check, to understand, why can't I see anything in
typec/PD subsystems?
I have a X13 Gen 3 [i5-1240P] which is about 18 months old. Everything you
mention is present plus the typec ports and the associated pd objects:
$ lsucpd
port0 [pd0] <<==== partner [pd2]
port1 [pd1] <
A power adapter is connected to port0. Here are the modules loaded:
$ lsmod | grep typec
typec_ucsi 57344 1 ucsi_acpi
roles 16384 1 typec_ucsi
typec 114688 1 typec_ucsi
usb_common 20480 4 xhci_hcd,usbcore,uvcvideo,typec_ucsi
$ lsmod | grep ucsi
ucsi_acpi 12288 0
typec_ucsi 57344 1 ucsi_acpi
roles 16384 1 typec_ucsi
typec 114688 1 typec_ucsi
usb_common 20480 4 xhci_hcd,usbcore,uvcvideo,typec_ucsi
$ ls /sys/bus/acpi/devices/USBC000:00
device:ac device:ad hid modalias path physical_node power status
subsystem uevent uid wakeup
Strange that the Thunderbolt module is loaded since I thought only the Intel
variants supported Thunderbolt.
The only thing that I can think of is some BIOS setting. When I poked around
in the X13 BIOS I don't remember any setting that would cause what you are
seeing.]
Doug Gilbert
