Cinnamon: Mouse acceleration cannot be disabled

[Frogging101]

If one moves the mouse acceleration slider in Cinnamon Settings¹, mouse acceleration will be enabled irreversibly, with no obvious way of turning it off again. One has to go into dconf and set org.cinnamon.settings-daemon.peripherals.mouse.motion-acceleration to -1.

The mouse acceleration slider control (which is linked to the aforementioned dconf value) has a range of 1.0 to 10.0. The value must be set to -1 in order to disable mouse acceleration, and the slider does not allow this. I can think of two ways to fix this:

• Add a checkbox to enable acceleration and display the slider
• Make the lowest value on the slider correspond to -1, and indicate to the user that this means it's turned off

It's probably a trivial enough change. I can make a PR if somebody wants to tell me how it should be done.

¹ as of 2.8.8, however I looked at the master branch code and it doesn't look fixed

[JosephMcc]

It isn't fixed. I just brought this up in IRC yesterday when looking at another issue with this same slider that some one reported on the Mint18 beta.

[JosephMcc]

Fixing this has been added to the roadmap for 3.2. I just want to do it in a way that fits in design wise with our other settings.

[Cobinja]

We could just set the range for the slider from 0 to 10, with steps of 0.1. Cinnamon settings daemon uses steps of 0.25, if the value is > 1, and does it steps of 0.1 if the value is > 0 and <= 1. If the value is 0, it handles it as "acceleration deactivated".

[JosephMcc]

You would have to map 0 to a value of -1 in that case. It still doesn't allow you to get back to the default -1 value. -1 and 0 are not treated the same as you can see if you set the gsettings key to 0 in dconf-editor or from the terminal.

[Cobinja]

Not really. Acc. to https://github.com/linuxmint/cinnamon-settings-daemon/blob/master/plugins/mouse/csd-mouse-manager.c#L436 ff. the acceleration is disabled, no matter if you set it -1 or 0. The GSettings key is not used anywhere else in Cinnamon related code, except for being set from Cinnamon Settings.

[JosephMcc]

@Cobinja Apologies I was talking about the wrong slider here. The "sensitivity" or motion-threshold slider suffers from the same issue. The default is -1 and you are unable to get back to that in the UI either.

[ghost]

Hi all,

Glad to hear this is on the roadmap for Cinnamon 3.2. This thread on Linux gaming brought it up again as a highly requested feature. I see posts about disabling mouse acceleration all the time.

Also perhaps there should be some consideration to it being turned off being the default?

Thanks for helping to make gaming on Linux better! :wolf:

[JosephMcc]

This is fixed now in git master.