Mouse dead behind LG Ultrawide (Thunderbolt 2) on Fedora 43 - Keyboard works fine?

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Hey everyone,

I’m hitting a wall with a weird USB/Thunderbolt issue on my Early 2015 13" MacBook. I just did a clean install of Fedora 43 (Workstation).

My setup: MBP → Thunderbolt 2 cable → LG 34UC98 monitor. I’m using the monitor’s built-in USB ports for my peripherals.

The Problem: The keyboard works perfectly through the monitor, but my mouse (Logitech G5) is completely dead. No movement, no clicks. It has power though and is listed in lsusb and libinput

What I know so far:

  • The mouse works if I plug it directly into the MacBook’s USB port.
  • The mouse works through the monitor on macOS and Windows (dual boot), so it’s not a hardware failure or a bad cable.
  • lsusb actually sees the mouse: Bus 003 Device 007: ID 046d:c049 Logitech, Inc. G5 Laser Mouse.
  • lsusb -t shows it sitting behind the monitor’s nested hubs as a HID device.
  • The kicker: libinput debug-events shows absolutely nothing when I move the mouse.

I’ve already tried:

  1. Switching to Xorg/GNOME Classic (no change).
  2. Checking boltctl. The monitor is authorized and the display/keyboard connected through the same thunderbolt cable are all fine.

Has anyone dealt with mice failing specifically behind Thunderbolt hubs on Linux? I’m not sure where to poke next.

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