ThinkPad Type 40A9 USB hub suddenly not working after update
https://askubuntu.com/questions/1564751/thinkpad-type-40a9-usb-hub-suddenly-not-working-after-updateI am running Kubuntu 24.04 with kernel 6.17.0-14-generic on a ThinkPad T480. Until today, my ThinkPad Type 40A9 dock's USB hub worked perfectly with my laptop.
Today I applied the following security updates when prompted:
Start-Date: 2026-03-12 10:01:59 Commandline: packagekit role='update-packages' Requested-By: Me (1000) Upgrade: libcurl4-openssl-dev:amd64 (8.5.0-2ubuntu10.7, 8.5.0-2ubuntu10.8), libgtk-4-common:amd64 (4.14.5+ds-0ubuntu0.7, 4.14.5+ds-0ubuntu0.9), libfreetype6:amd64 (2.13.2+dfsg-1build3, 2.13.2+dfsg-1ubuntu0.1), libcurl3t64-gnutls:amd64 (8.5.0-2ubuntu10.7, 8.5.0-2ubuntu10.8), libcurl4t64:amd64 (8.5.0-2ubuntu10.7, 8.5.0-2ubuntu10.8), libgtk-4-1:amd64 (4.14.5+ds-0ubuntu0.7, 4.14.5+ds-0ubuntu0.9), libfreetype-dev:amd64 (2.13.2+dfsg-1build3, 2.13.2+dfsg-1ubuntu0.1), curl:amd64 (8.5.0-2ubuntu10.7, 8.5.0-2ubuntu10.8), libgtk-4-bin:amd64 (4.14.5+ds-0ubuntu0.7, 4.14.5+ds-0ubuntu0.9), libgtk-4-media-gstreamer:amd64 (4.14.5+ds-0ubuntu0.7, 4.14.5+ds-0ubuntu0.9) End-Date: 2026-03-12 10:02:03
Now the dock display output and charging still work, but usb devices are usually not recognized, or work for a short amount of time before becoming unresponsive again:
With the external wired keyboard and wireless mouse connected to the laptop directly:
me@my-laptop:~$ lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 046a:c092 CHERRY CHERRY Wireless Device
Bus 001 Device 004: ID 058f:9540 Alcor Micro Corp. AU9540 Smartcard Reader
Bus 001 Device 009: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
Bus 001 Device 010: ID 13d3:56a6 IMC Networks Integrated Camera
Bus 001 Device 011: ID 06cb:009a Synaptics, Inc. Metallica MIS Touch Fingerprint Reader
Bus 001 Device 020: ID 046a:c12a CHERRY CHERRY USB KEYBOARD
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 002: ID 0bda:0316 Realtek Semiconductor Corp. Card Reader
Bus 002 Device 003: ID 17ef:101f Lenovo
Bus 002 Device 004: ID 17ef:1020 Lenovo ThinkPad Dock Hub
Bus 002 Device 005: ID 17ef:3062 Lenovo ThinkPad Dock Ethernet [Realtek RTL8153B]
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
with the wired keyboard connected to the dock, and the wireless mouse attached directly to the laptop:
lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 046a:c092 CHERRY CHERRY Wireless Device
Bus 001 Device 004: ID 058f:9540 Alcor Micro Corp. AU9540 Smartcard Reader
Bus 001 Device 009: ID 8087:0a2b Intel Corp. Bluetooth wireless interface
Bus 001 Device 010: ID 13d3:56a6 IMC Networks Integrated Camera
Bus 001 Device 011: ID 06cb:009a Synaptics, Inc. Metallica MIS Touch Fingerprint Reader
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 002 Device 002: ID 0bda:0316 Realtek Semiconductor Corp. Card Reader
Bus 002 Device 003: ID 17ef:101f Lenovo
Bus 002 Device 004: ID 17ef:1020 Lenovo ThinkPad Dock Hub
Bus 002 Device 005: ID 17ef:3062 Lenovo ThinkPad Dock Ethernet [Realtek RTL8153B]
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
I have already disabled USB autosuspend:
cat /sys/module/usbcore/parameters/autosuspend
-1
What to try further?








