Lateral mouse movement stops scroll wheel

[Simon Walter]

On 2020-07-29 13:59, Russell Haley wrote:
> 
> Hi Simon, thanks for responding. We are seeing the issue in our virtual
> machine 2 instances:
> 
>   - Ubuntu Eoan (18?)running Mate desktop.   
>   - Virtual Box 6.1.x (varies). Client Additions are installed.
>   - One Kubuntu Host, 2 Windows 10 Hosts
>   - Hardware varies
> 
> The problem only happens in KDevelop so far; Eclipse, Pluma (Puma?),
> Geany and Firefox all work fine. I suspect all the mouse settings are
> default.
> 
> I thought it was happening on Windows, but I tested on a laptop today
> and found no issue with the trackpad or a wireless mouse. I will check a
> Windows VM asap. 
> 
> Let me know what other details I can provide.
> 

Interesting. Do you see the same behavior in another KDE application
such as Kate or Dolphin? I have KDE installed on a laptop and two finger
scroll enabled. When I scroll with two fingers, the mouse movement gets
disabled. Are you using KDE?

It maybe something to do with the combination of the OS mouse drivers,
VM mouse drivers, and the mouse settings in the host OS and VM. I think
they are in conflict. If you are using KDE, you can see the touchpad
settings under Hardware->Input Devices. Try enabling/disabling scrolling
two finger or otherwise. I am not sure about other DEs such as GNOME,
but there is probably a similar mouse setting app.