The `logitech-hidpp-device` is the Logitech unified receiver I have connected to the dock. It always generates lots of error messages like this, even when connected directly to the computer's built-in USB port.
There's another Logitech unified receiver connected to the computer itself, for the mouse that travels with the laptop, and that doesn't do this behavior, it just looks like this (w/o debug logs): Dec 31 17:11:42 vesho kernel: usb 1-1: New USB device found, idVendor=046d, idProduct=c52b, bcdDevice=12.10 Dec 31 17:11:42 vesho kernel: usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 Dec 31 17:11:42 vesho kernel: usb 1-1: Product: USB Receiver Dec 31 17:11:42 vesho kernel: usb 1-1: Manufacturer: Logitech Dec 31 17:11:42 vesho kernel: logitech-djreceiver 0003:046D:C52B.0090: hiddev0,hidraw1: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:00:14.0-1/input2 Dec 31 17:11:42 vesho kernel: logitech-hidpp-device 0003:046D:4026.0091: HID++ 2.0 device connected. Dec 31 17:11:42 vesho kernel: input: Logitech T400 as /devices/pci0000:00/0000:00:14.0/usb1/1-1/1-1:1.2/0003:046D:C52B.0090/0003:046D:4026.0091/input/input115 Dec 31 17:11:42 vesho kernel: logitech-hidpp-device 0003:046D:4026.0091: input,hidraw2: USB HID v1.11 Keyboard [Logitech T400] on usb-0000:00:14.0-1/input2:1 According to fwupdmgr, they are both running an up to date firmware (both got updated recently, though they have a different "VersionBootloader" where the OK one has "BOT01.02_B0014" and the problematic one has "BOT01.02_B0015". Interestingly enough, at one point I got the "unknown event type 15" error from lp1766076 immediately when plugging in the problematic receiver to the dock, but I didn't manage to reproduce that. I'm going to try to work without the problematic receiver for a bit and see if things improve. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1856161 Title: Thunderbolt dock fails to connect USB devices To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1856161/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
