[Bug] Mx Master 3s Not detected

[nicks-crumpets]

Mouser version

v3.5.3

How are you running Mouser?

Official GitHub release asset

Build / asset details

Linux x86 intel

Operating system

Linux

OS version details

Zorin OS 18.1 Core

Mouse connection type

Bluetooth

Logitech Options+ status

• I have confirmed that Logitech Options+ is not running

What happened?

When first trying to launch nothing happened
When launching with terminal, this error appeared:

qt.qpa.plugin: From 6.5.0, xcb-cursor0 or libxcb-cursor0 is needed to load the Qt xcb platform plugin.
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: vnc, vkkhrdisplay, offscreen, xcb, eglfs, minimalegl, minimal, wayland-brcm, wayland-egl, wayland, linuxfb.

Aborted

Then after installing dependencies successfully:

sudo apt install libxcb-cursor0

The app launches, however never detects my Logitech MX master 3s.
It's paired, and I tried re pairing but nothing changed

Proof that it's paired:

Expected behavior

Should work

Steps to reproduce

No specific steps, just install on an Ubuntu based Linux distribution. Zorin specifically but I doubt it would make a difference

Device info JSON

N/A

Log file contents

2026-04-17 13:29:58 [Startup] Env setup:            5.4 ms
2026-04-17 13:29:58 [Startup] PySide6 imports:     33.6 ms
2026-04-17 13:29:58 [Startup] Core imports:        33.9 ms
2026-04-17 13:29:58 [Startup] Total imports:       72.9 ms
2026-04-17 13:30:17 [Startup] Env setup:            5.0 ms
2026-04-17 13:30:17 [Startup] PySide6 imports:     34.4 ms
2026-04-17 13:30:17 [Startup] Core imports:        33.2 ms
2026-04-17 13:30:17 [Startup] Total imports:       72.5 ms
2026-04-17 13:30:19 [Startup] Env setup:            4.4 ms
2026-04-17 13:30:19 [Startup] PySide6 imports:     32.8 ms
2026-04-17 13:30:19 [Startup] Core imports:        33.5 ms
2026-04-17 13:30:19 [Startup] Total imports:       70.8 ms
2026-04-17 13:32:03 [Startup] Env setup:            4.4 ms
2026-04-17 13:32:03 [Startup] PySide6 imports:     32.8 ms
2026-04-17 13:32:03 [Startup] Core imports:        33.2 ms
2026-04-17 13:32:03 [Startup] Total imports:       70.5 ms
2026-04-17 13:32:15 [Startup] Env setup:            4.4 ms
2026-04-17 13:32:15 [Startup] PySide6 imports:     32.9 ms
2026-04-17 13:32:15 [Startup] Core imports:        33.1 ms
2026-04-17 13:32:15 [Startup] Total imports:       70.5 ms
2026-04-17 13:33:26 [Startup] Env setup:            4.5 ms
2026-04-17 13:33:26 [Startup] PySide6 imports:     33.6 ms
2026-04-17 13:33:26 [Startup] Core imports:        33.5 ms
2026-04-17 13:33:26 [Startup] Total imports:       71.7 ms
2026-04-17 13:33:26 [Startup] QApp create:         55.4 ms
2026-04-17 13:33:26 [Startup] Engine create:        0.2 ms
2026-04-17 13:33:26 [Startup] QML load:           359.4 ms
2026-04-17 13:33:26 [Startup] TOTAL to window:    486.9 ms
2026-04-17 13:33:26 [HidGesture] No compatible device; retrying in 5 s…
2026-04-17 13:33:26 [Mouser] Engine started — remapping is active
2026-04-17 13:34:37 [Mouser] Shut down cleanly
2026-04-17 13:34:40 [Startup] Env setup:            5.1 ms
2026-04-17 13:34:40 [Startup] PySide6 imports:     36.3 ms
2026-04-17 13:34:40 [Startup] Core imports:        36.7 ms
2026-04-17 13:34:40 [Startup] Total imports:       78.0 ms
2026-04-17 13:34:40 [Startup] QApp create:         63.0 ms
2026-04-17 13:34:40 [Startup] Engine create:        0.3 ms
2026-04-17 13:34:40 [Startup] QML load:           255.5 ms
2026-04-17 13:34:40 [Startup] TOTAL to window:    397.1 ms
2026-04-17 13:34:40 [HidGesture] No compatible device; retrying in 5 s…
2026-04-17 13:34:40 [Mouser] Engine started — remapping is active
2026-04-17 13:41:38 [Mouser] Shut down cleanly
2026-04-17 13:48:04 [Startup] Env setup:            4.5 ms
2026-04-17 13:48:04 [Startup] PySide6 imports:     36.2 ms
2026-04-17 13:48:04 [Startup] Core imports:        33.5 ms
2026-04-17 13:48:04 [Startup] Total imports:       74.1 ms
2026-04-17 13:48:04 [Startup] QApp create:         52.9 ms
2026-04-17 13:48:04 [Startup] Engine create:        0.2 ms
2026-04-17 13:48:04 [Startup] QML load:           303.0 ms
2026-04-17 13:48:04 [Startup] TOTAL to window:    430.5 ms
2026-04-17 13:48:04 [HidGesture] No compatible device; retrying in 5 s…
2026-04-17 13:48:04 [Mouser] Engine started — remapping is active

Screenshots or screen recordings

See description

Additional context

N/A

[nicks-crumpets]

Update: Tested on a laptop also running the same OS, still has the connection issue but did not experience the dependency issue

[mxdzs0612]

met same problem with master3

[nicks-crumpets]

met same problem with master3

Same OS?

[mxdzs0612]

met same problem with master3

Same OS?

ubuntu.

[thisislvca]

Looking into it, might be because of a change I made recently, sorry!

[nicks-crumpets]

Looking into it, might be because of a change I made recently, sorry!

No worries that's great! Look forward to trying it again soon :)

[thisislvca]

I pushed a test build from branch issue-111-fix that adjusts Linux HID discovery for known Logitech devices when hidapi enumeration is missing the vendor usage metadata Mouser normally expects.

Could you try the Mouser-Linux artifact from this Actions run and let me know whether it detects your mouse now?

https://github.com/TomBadash/Mouser/actions/runs/24696505332

If it still shows Not Connected, please paste the new log output too, since this build adds a bit more signal around the detection path.