Mouse sensitivity slider doesn't work

[knerlington]

 * cinnamon-control-center 3.6.5+sylvia
 * Distribution - Mint 18.2 Cinnamon and Mint 18.3 Cinnamon 
 * NVIDIA GTX 1070 with driver 390.25
 * 64 bit
 * libinput or evdev

Issue
Moving the slider for mouse sensitivity doesn't affect the sensitivity at all.
Lowest value is exactly the same as the highest one.
Using both evdev and libinput I have an option called Coordinate Transformation Matrix according to xinput and with this both the speed in X- and Y-axes can be controlled. Problem is that this isn't affected at all when moving the slider for the mouse sensitivity in the control panel.

I don't know if this is supposed to happen, but I'm guessing it is.

Tried on two different mice.
1x Steelseries Rival 300
1x Mionix Naos 7000

Custom acceleration works, but not the speed/sensitivity.

Steps to reproduce
Out of the box after clean installation of the OS or in Live disk.

Expected behaviour
Changing the sensitivity slider should change the speed of the mouse pointer.

Other information

[MilesBHuff]

I'm having the same issue on Linux Mint 19.

[sguillia]

Same issue, this has been happening for years

The work-around with xinput --set-prop worked for me, details here

[icarter09]

@knerlington did the comment from @sguillia help to resolve your issue?

[Betalord]

I have exactly the same problem on clean Mint 20 installation: acceleration works, mouse sensitivity does not (min and max value are the same, and don't change anything).
How is it possible that this doesn't work?

[nathanfranke]

@icarter09 That is only a workaround. The fact that the slider doesn't work is still an issue

[TechnologyMan101]

This happens on my Mint 20 installations too. I have 2 Linux Mint 20 installations and they both do this.

At least the mice I use are perfect with the defaults.

[harrisonmoss]

It's never happened to me, I will try it and see...

[hacker1024]

I'm getting this issue on Arch with Cinnamon, with both a generic USB mouse and a bluetooth Magic Mouse 2.

[knerlington]

@knerlington did the comment from @sguillia help to resolve your issue?

Manually using xinput to set the variables works to some extent, but it's a tedious workaround and not a fix for the issue. The slider doesn't work. You can drag it around, but it changes nothing.

[Gvanderl]

I'm having the same issue, any way to change it without changing mouse acceleration ?

[bobmagicii]

big oof. if i had to guess the problem would be the slider slides positive values and half the mice around seem to expect negative values.

[MrGibus]

I have 4 entries for Razer Razer Basilisk V2. 2 are registered as pointers and 2 as keyboard.
Installed Open Razer and reduced dpi setting to fix.