35

I can't find a single desktop environment that supports setting both mouse acceleration AND mouse sensitivity. I don't want any mouse acceleration, but I want to increase the speed of my mouse. That means that if I move the mouse the same distance, the pointer will move the same distance every time, no matter how quickly I move the mouse.

KDE will let me set mouse acceleration to 1x, but the mouse moves too slow then, and I can't figure out how to increase the speed. I am willing to accept a CLI solution, but I have only been able to get xinput to change acceleration. I don't recall having much luck with xset, either.

  • Can't you do this by increasing both the acceleration and the threshold at which the acceleration is triggered? Does this help? – terdon Sep 13 '13 at 22:17
  • 1
    I don't think so. If I understand correctly, that would simply leave me with a slow mouse at 1x accel until I move the pointer a certain distance, upon which accel would kick in. I want my pointer to always move at the same velocity. I don't want any acceleration at all. – David Gay Sep 13 '13 at 22:21
  • I am not sure either, but I seem to be getting somewhere with xset m 3 400, the idea being to set the threshold high enough that you never pass it so you don't have acceleration as such. Perhaps if you play with that a bit? – terdon Sep 13 '13 at 22:33
  • I know that I can eliminate acceleration, but I want to increase the SPEED without acceleration. Increased velocity, zero acceleration. I am talking in #kde right now and it seems that the only solution may be to purchase a mouse with greater DPI. :/ If I don't get a good answer in a while, I'll answer it myself as impossible. – David Gay Sep 13 '13 at 22:35
  • 3
    This was asked and answered over on the Ubuntu SE: askubuntu.com/questions/172972/… – Warren Young Sep 13 '13 at 22:56
24

Just force the pointer to skip pixels, here's how:

First list input devices:

$ xinput list                                                               
⎡ Virtual core pointer                          id=2    [master pointer  (3)]                                 
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]                                 
⎜   ↳ PixArt USB Optical Mouse                  id=10   [slave  pointer  (2)]                                 
⎜   ↳ ETPS/2 Elantech Touchpad                  id=15   [slave  pointer  (2)]                                 
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]                                 
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]                                 
    ↳ Power Button                              id=6    [slave  keyboard (3)]                                 
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]                                 
    ↳ Sleep Button                              id=8    [slave  keyboard (3)]                                 
    ↳ USB2.0 UVC 2M WebCam                      id=9    [slave  keyboard (3)]                                 
    ↳ Asus Laptop extra buttons                 id=13   [slave  keyboard (3)]                                 
    ↳ AT Translated Set 2 keyboard              id=14   [slave  keyboard (3)]                                 
    ↳   USB Keyboard                            id=11   [slave  keyboard (3)]                                 
    ↳   USB Keyboard                            id=12   [slave  keyboard (3)]   

In the example we see the mouse id is 10. Next list its properties:

$ xinput list-props 10
Device 'PixArt USB Optical Mouse':
        Device Enabled (140):   1
        Coordinate Transformation Matrix (142): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
        Device Accel Profile (265):     0
        Device Accel Constant Deceleration (266):       1.000000
        Device Accel Adaptive Deceleration (267):       1.000000
        Device Accel Velocity Scaling (268):    10.000000
        Device Product ID (260):        2362, 9488
        Device Node (261):      "/dev/input/event5"
        Evdev Axis Inversion (269):     0, 0
        Evdev Axes Swap (271):  0
        Axis Labels (272):      "Rel X" (150), "Rel Y" (151), "Rel Vert Wheel" (264)
        Button Labels (273):    "Button Left" (143), "Button Middle" (144), "Button Right" (145), "Button Wheel Up" (146), "Button Wheel Down" (147), "Button Horiz Wheel Left" (148), "Button Horiz Wheel Right" (149)
        Evdev Middle Button Emulation (274):    0
        Evdev Middle Button Timeout (275):      50
        Evdev Third Button Emulation (276):     0
        Evdev Third Button Emulation Timeout (277):     1000
        Evdev Third Button Emulation Button (278):      3
        Evdev Third Button Emulation Threshold (279):   20
        Evdev Wheel Emulation (280):    0
        Evdev Wheel Emulation Axes (281):       0, 0, 4, 5
        Evdev Wheel Emulation Inertia (282):    10
        Evdev Wheel Emulation Timeout (283):    200
        Evdev Wheel Emulation Button (284):     4
        Evdev Drag Lock Buttons (285):  0

We want the «Coordinate Transformation Matrix», remember its №142.

By changing this property we can increase the pointer speed. It is a transformation matrix, used to calculate a pointer movement. From the link:

By default, the CTM for every input device in X is the identity matrix. As an example, lets say you touch a touchscreen at point (400, 197) on the screen:

⎡ 1 0 0 ⎤   ⎡ 400 ⎤   ⎡ 400 ⎤
⎜ 0 1 0 ⎥ · ⎜ 197 ⎥ = ⎜ 197 ⎥
⎣ 0 0 1 ⎦   ⎣  1  ⎦   ⎣  1  ⎦

The X and Y coordinates of the device event are input in the second matrix of the calculation. The result of the calculation is where the X and Y coordinates of the event are mapped to the screen. As shown, the identity matrix maps the device coordinates to the screen coordinates without any changes.

So, we want to increase the values according to x and y, thus increasing the pointer speed. An example from my PC:

$ xinput set-prop 10 142 2.400000, 0.000000, 0.000000, 0.000000, 2.400000, 0.000000, 0.000000, 0.000000, 1.000000

It is xinput set-prop <device-id> <property-number> <property-values>. Play a bit with this until you find the appropriate one. Note: do not change the last value of the matrix. That was my error when I tried it to get work — in this case you just won't see any difference.

Acknowledgements: I am grateful to Simon Thum from xorg mailing list, he was the one who gave the hint about the matrix.

UPD: note, some Windows games running with Wine may have odd pointer behavior (e.g. noticed, that the aim in old Counter Strike 1.6 declines down, until it stares the floor, no matter how you move the mouse), in this case just reset x and y of CTM to 1 before running the game.

  • 1
    @Wyatt8740 I recently noted that in some circumstances the property number could change on its own, for such a case it is possible to use device/property name instead of a number. I.e. with my device: xinput set-prop "PixArt USB Optical Mouse" "Coordinate Transformation Matrix" 2.400000, 0.000000, 0.000000, 0.000000, 2.400000, 0.000000, 0.000000, 0.000000, 1.000000. – Hi-Angel Mar 11 '15 at 6:52
  • yeah, I used those strings too. – Wyatt8740 Mar 28 '15 at 1:48
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    Awesome, the only thing that works for me – MichalH Jul 24 '15 at 11:42
17

The following has been copied verbatim from an answer that @Luke posted on Ask Ubuntu. I am posting it as a community wiki answer so the information can be on this site as well.


KDE has not built this into its control center yet, but you can use xinput from the command line. First, run xinput list to find the device number of your mouse:

$ xinput list
⎡ Virtual core pointer                          id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
⎜   ↳ SynPS/2 Synaptics TouchPad                id=10   [slave  pointer  (2)]
⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard              id=9    [slave  keyboard (3)]

On my laptop, the device id I want is 10 (SynPS/2 Synaptics TouchPad). On your system, you will have to decide which device is the correct one. Next, run xinput list-props <your device id> to see the current settings for that device:

$ xinput list-props 10
Device 'SynPS/2 Synaptics TouchPad':
    Device Enabled (144):   1
    Device Accel Profile (266):     1
    Device Accel Constant Deceleration (267):       2.500000
    Device Accel Adaptive Deceleration (268):       1.000000
    Device Accel Velocity Scaling (269):    12.500000
  [ many more settings omitted ]

The property you are interested in is "Device Accel Constant Deceleration (267)". To slow your mouse down, the value must be increased by running xinput set-prop <your device id> <property id> <value>:

$ xinput set-prop 10 267 5.0

In this example, the value is increased from 2.5 to 5.0 and the mouse moves at half-speed.


Explanation of properties can be found at X.org.

If one are using this in scripts the use of full names can be of help as id etc. can change. E.g:

xinput --set-prop "SynPS/2 Synaptics TouchPad" "Device Accel Constant Deceleration" 1
  • If you don't agree with what I've done here, come tell me so on this meta post. – terdon Sep 14 '13 at 4:16
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    If you could just clarify: Does "Device Accel Constant Deceleration" have to do with acceleration or sensitivity? Could you please give a command example for my question? One that removes all mouse acceleration but still lets me increase mouse sensitivity (WITHOUT acceleration)? – David Gay Sep 17 '13 at 20:49
  • @oddshocks honestly, I have no idea. I copied this from the site I link to. That is also an SE site, I would just go ask them. – terdon Sep 17 '13 at 21:28
  • @terdon so how do I increase the mouse pointer speed? The option you pointed out is set to «1.0» by default, and an attempts to decrease it farther be giving a negative value, or, at least, something like «0.1» triggers an error. – Hi-Angel Jan 5 '15 at 14:46
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    This only works if your device allows that option, which mine didn't. You can check with xinput list-props <device-id> – Franklin Sep 21 '17 at 15:10
4

If you're using Xorg.conf to set up your X Server, you can use that in order to set acceleration or deceleration. Just add something to the effect of:

Section "InputDevice"
    Identifier "name"
    Driver "evdev"
    Option "ConstantDeceleration" "multiplier"
EndSection

where multiplier is how many times slower you want the mouse to go. 0.5 would double the speed, or 2 would halve it. Equivalently, though more complex:

Section "InputDevice"
    Identifier "name"
    Driver "evdev"
    Option "TransformationMatrix" "a b c d e f g h i"
EndSection

where "a" through "i" are the transformation matrix, as described in other answers.
Source: xorg.conf manpage

2

I use the following settings in Mint 17.2 + Cinnamon, but I think it works in your environment as well.

xinput list # to get the id of your mouse
xinput list-props 10 # to list the properties of your mouse
xinput set-prop 10 'Device Accel Profile' -1 # turns off mouseaccel
xinput set-prop 10 'Device Accel Constant Deceleration' 1.5 # settings the sens

I suggest you to set the DPI on your mouse at maximum first (I have buttons for that). After that you can decrease the deceleration if you still have too low sens.

If everything is fine you can put this into the proper file in your system, so it will load the settings by booting. To me that file is the ~/.xinputrc.

Some info about these xinput properties: http://www.x.org/wiki/Development/Documentation/PointerAcceleration/

(Note: I love Linux! <3 After I "upgraded" my system from XP in 2009. Since then I had mouseaccel on Windows 7, no matter what accelfix I tried. Trust me, I tried all of them. Now after 6 years, I managed to turn it off on Linux Mint. :-) It was a bit too late, I ended my gaming carrier at least partially because of this. It meant -20% accuracy in my FPS. So I played at 40% instead of 50-60% acc, which is a low-med skill instead of a high. The game is dead now, but still it is a release that I don't have to bear this mouseaccel thing by using the op system.)

0

in Ubuntu 16.04 the property for my mouse is:

Device Accel Constant Deceleration (279)

It is set to 1.0 by default. If you increase the value then your mouse is going to slow down.

0

try LXInput, this is what I use, I didn't realise what acceleration & sensitivity did until I read your post^ (so thankyou! ) it is in the standard repository for ubuntu 16.04. Please note I am setting mouse DPI via Solaar, so not sure if Solaar & LXInput are interacting in a way that would make LXInput useless on it's own. edit sorry I think LXInpu's "sensitivity" and "acceleration" are different to speed. i think "sensitivity" is how sensitive the acceleration is. sorry. however-> Solaar definitely can be used to set DPI / Speed for logitech mice, but only the latest from github, not the ones in repositories


LXInput is a GUI application for the Lightweight X11 Desktop Environment (LXDE).

It configures keyboard and mouse settings:

  • Delay and Interval for character repeat * Enable/Disable beeps of keyboard input error * Swap left and right mouse buttons * Mouse acceleration and sensitivity

0.3.5-1 Ubuntu

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