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I am using an OpenSUSE Tumbleweed with Gnome DE on a laptop probably no one of
you know (a ���JDM��� Mouse convertible without proper name, partnumber
BC-MB1485UD11A-191).

First volume level was changing itself up and down all the time. It is not
pulse flat-volumes, it���s like reacting to me pressing a volume up/down hotkey,
except that I am not. Showkey showed a corresponding hotkey being pressed and
lifted by itself, when I just leaved my laptop lying to see what happens. I've
disabled peaq-wmi and input_polldev modules, but it changed nothing.

After some updates it changed behavior, now it does not happen by itself, and I
can freely use Fn+F7/F8 hotkeys to change the volume level (showkey tells that
keycodes are the same). But if I use dedicated side buttons, they trigger
volume change at least twice. For example, I lower volume, and after couple of
seconds it lowers itself again.
It definitely looks like hardware issue, but I tried to reproduce this in
Windows 10, and no matter how hard/light/at weird angles I pushed side buttons,
it worked without any problems.

Only wmi modules I have active:
[CODE]
���  ~ lsmod | grep wmi
intel_wmi_thunderbolt    20480  0
wmi_bmof               16384  0
wmi                    32768  2 intel_wmi_thunderbolt,wmi_bmof
[/CODE]

Tried logging out, removing ~/.config/pulse and logging back in, the issue
persists.
Tried creating new user, the issue persists.
It was present since the moment I installed OS.

Reproducible: Always

Steps to Reproduce:
1. Push dedicated side volume up/down button
2. Lift dedicated side volume up/down button
Actual Results:  
1. Volume level changes
2. Volume level changes again after couple of seconds

Expected Results:  
Volume level changes once