Hello,

I randomly get undesirable input event, like pressing F1 but getting both F1 and F9 pressed.
I used evtest to capture both the good and the bad behavior.

good :
```
Event: time 1689357649.073609, type 4 (EV_MSC), code 4 (MSC_SCAN), value 7003a
Event: time 1689357649.073609, type 1 (EV_KEY), code 59 (KEY_F1), value 1
Event: time 1689357649.073609, -------------- SYN_REPORT ------------
Event: time 1689357649.075608, type 4 (EV_MSC), code 4 (MSC_SCAN), value 7003a
Event: time 1689357649.075608, type 1 (EV_KEY), code 59 (KEY_F1), value 0
Event: time 1689357649.075608, -------------- SYN_REPORT ------------
```

bad :
```
Event: time 1689355902.452992, type 4 (EV_MSC), code 4 (MSC_SCAN), value 70042
Event: time 1689355902.452992, type 1 (EV_KEY), code 67 (KEY_F9), value 1
Event: time 1689355902.452992, type 4 (EV_MSC), code 4 (MSC_SCAN), value 7003a
Event: time 1689355902.452992, type 1 (EV_KEY), code 59 (KEY_F1), value 1
Event: time 1689355902.452992, -------------- SYN_REPORT ------------
Event: time 1689355902.453989, type 4 (EV_MSC), code 4 (MSC_SCAN), value 70042
Event: time 1689355902.453989, type 1 (EV_KEY), code 67 (KEY_F9), value 0
Event: time 1689355902.453989, type 4 (EV_MSC), code 4 (MSC_SCAN), value 7003a
Event: time 1689355902.453989, type 1 (EV_KEY), code 59 (KEY_F1), value 0
Event: time 1689355902.453989, -------------- SYN_REPORT ------------
```

This is not limited to F9, any key can get "stuck" and will tag along any other key.
Pressing the "stuck" key once will resolve the issue for now.

The input device is in pristine condition and does not show any visible mechanical issue.

Is there any tool I can try before replacing the hardware?
Can this be a driver issue?

Thank you very much.

Can we presume this keyboard is wired, and USB based?
Are you interested in providing information about the distribution, version, desktop (and version), drivers, or other detail?
Are you running on Wayland or X.org?

If you want to be absolutely sure it is broken, try sniffing raw USB data https://www.google.co.uk/search?q=usb+sniffing+linux (assuming it is a USB device).

thank you for the reply, i should probably have specified that this is coming from a mouse which side buttons are detected as a keyboard (razer naga v2 hyperspeed)

I am using an arch distro + zen kernel + sway wayland compositor and no desktop environment

The device is currently plugged in usb2 port (had the same problem with usb3 port)

I didn't install any driver for this device (openrazer doesn't support my device yet)

I will try sniffing the raw usb data

thank you