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ubuntu:mouse:change_mouse_sensitivity [2021/10/26 10:10] – created peterubuntu:mouse:change_mouse_sensitivity [2021/10/26 10:50] (current) – peter
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 ====== Ubuntu - Mouse - Change Mouse Sensitivity ====== ====== Ubuntu - Mouse - Change Mouse Sensitivity ======
  
 +  * [[Ubuntu:Mouse:Determine the Mouse|Determine the Mouse]].
 +
 +----
 +
 +===== Determine the system =====
 +
 +<code bash>
 +xinput list-props 8
 +</code>
 +
 +returns:
 +
 +<code bash>
 +Device 'Razer Razer DeathAdder V2':
 + Device Enabled (155): 1
 + Coordinate Transformation Matrix (157): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
 + libinput Natural Scrolling Enabled (291): 0
 + libinput Natural Scrolling Enabled Default (292): 0
 + libinput Scroll Methods Available (293): 0, 0, 1
 + libinput Scroll Method Enabled (294): 0, 0, 0
 + libinput Scroll Method Enabled Default (295): 0, 0, 0
 + libinput Button Scrolling Button (296): 2
 + libinput Button Scrolling Button Default (297): 2
 + libinput Middle Emulation Enabled (298): 0
 + libinput Middle Emulation Enabled Default (299): 0
 + libinput Accel Speed (300): 0.742647
 + libinput Accel Speed Default (301): 0.000000
 + libinput Accel Profiles Available (302): 1, 1
 + libinput Accel Profile Enabled (303): 1, 0
 + libinput Accel Profile Enabled Default (304): 1, 0
 + libinput Left Handed Enabled (305): 0
 + libinput Left Handed Enabled Default (306): 0
 + libinput Send Events Modes Available (276): 1, 0
 + libinput Send Events Mode Enabled (277): 0, 0
 + libinput Send Events Mode Enabled Default (278): 0, 0
 + Device Node (279): "/dev/input/event7"
 + Device Product ID (280): 5426, 132
 + libinput Drag Lock Buttons (307): <no items>
 + libinput Horizontal Scroll Enabled (308): 1
 +</code>
 +
 +<WRAP info>
 +**NOTE:**  The initial 8 is the Mouse Id as determined per [[Ubuntu:Mouse:Determine the Mouse|Determine the Mouse]].
 +
 +  * The **libinput** lines indicate that this is **Wayland/libinput**.
 +
 +</WRAP>
 +
 +----
 +
 +===== On Wayland/libinput systems =====
 +
 +<code bash>
 +xinput --set-prop "Device Name" "libinput Accel Speed" -0.9
 +</code>
 +
 +<WRAP info>
 +**NOTE:**  The number must be an integer between 1 and -1, and appears less flexible than the old **Constant Deceleration** setting.
 +
 +  * Check [[https://wayland.freedesktop.org/libinput/doc/latest/pointer-acceleration.html#ptraccel-linear|this plot]] to see the impact of different acceleration speed values. 
 +
 +  * libinput calculates the mouse acceleration depending on the DPI and the parameter Acceleration Speed.
 +
 +</WRAP>
 +
 +----
 +
 +===== On non-Wayland/libinput systems =====
 +
 +<code bash>
 +xinput --set-prop "Device Name" "Device Accel Constant Deceleration" 5
 +</code>
 +
 +<WRAP info>
 +**NOTE:**  The lower the number the faster it will be, similarly, higher the number slower it will be.
 +</WRAP>
 +
 +----
 +
 +==== To turn off mouse acceleration ====
 +
 +<code bash>
 +xinput --set-prop "Razer DeathAdder" "Device Accel Velocity Scaling" 1
 +xinput --set-prop "Razer DeathAdder" "Device Accel Profile" -1
 +</code>
 +
 +
 +----
 +
 +===== Confirm any changes =====
 +
 +<code bash>
 +xinput --list-props 8
 +</code>
 +
 +<WRAP info>
 +**NOTE:** The 8 is the device-id per [[Ubuntu:Mouse:Determine the Mouse|Determine the Mouse]].
 +</WRAP>
 +
 +----
 +
 +===== Using xset to change acceleration =====
 +
 +xset can also be used to change acceleration.
 +
 +<WRAP info>
 +**NOTE:** xset does not use libinput.
 +</WRAP>
 +
 +----
 +
 +==== Get the current xset values ====
 +
 +<code bash>
 +xset q | grep -A 1 Pointer
 +</code>
 +
 +returns:
 +
 +<code bash>
 +Pointer Control:
 +  acceleration:  2/1    threshold:  4
 +</code>
 +
 +<WRAP info>
 +**NOTE:**
 +
 +  * **acceleration** defines how many times faster the cursor will move than the default speed.
 +    * acceleration can be a fraction.
 +    * To slow down the mouse, use 1/2, 1/3, 1/4, ...
 +    * To make it faster, use 2/1, 3/1, 4/1, ...
 +
 +  * **threshold** is the velocity required for acceleration to become effective, usually measured in device units per 10ms.
 +    * Threshold defines the point at which acceleration should occur in pixels per 10 ms.
 +    * If threshold is zero, then acceleration is treated as "the exponent of a more natural and continuous formula.".
 +      * This gives precise control for slow motion but big reach for fast motion, and a progressive transition for motions in between.
 +
 +</WRAP>
 +
 +----
 +
 +==== Set new values ====
 +
 +<code bash>
 +xset m acceleration threshold
 +</code>
 +
 +<WRAP info>
 +**NOTE:**
 +
 +  * **acceleration** defines how many times faster the cursor will move than the default speed.
 +    * acceleration can be a fraction.
 +    * To slow down the mouse, use 1/2, 1/3, 1/4, ...
 +    * To make it faster, use 2/1, 3/1, 4/1, ...
 +
 +  * **threshold** is the velocity required for acceleration to become effective, usually measured in device units per 10ms.
 +    * Threshold defines the point at which acceleration should occur in pixels per 10 ms.
 +    * If threshold is zero, then acceleration is treated as "the exponent of a more natural and continuous formula.".
 +      * This gives precise control for slow motion but big reach for fast motion, and a progressive transition for motions in between.
 +      * Recommended acceleration value in this case is 3/2 to 2, but not limited to that range. <code bash>
 +xset m 3/2 0
 +</code>
 +
 +</WRAP>
 +
 +
 +To reduce mouse acceleration
 +
 +<code bash>
 +xset mouse 1 1
 +</code>
 +
 +To increase the mouse speed
 +<code bash>
 +xset mouse 10 1
 +</code>
 +
 +----
 +
 +==== Reset xset to the default settings ====
 +
 +<code bash>
 +xset m default
 +</code>
 +
 +----
 +
 +===== Save the New Setting Permanently =====
 +
 +Add a new file in **/usr/share/X11/xorg.conf.d/**.
 +
 +For example, /usr/share/X11/xorg.conf.d/60-razer-deathadder-v2.conf
 +
 +<file bash /usr/share/X11/xorg.conf.d/60-razer-deathadder-v2.conf>
 +Section "InputClass"
 +   Identifier      "Razer Deathadder v2"
 +   MatchProduct    "Razer Razer DeathAdder V2"
 +   Option          "ConstantDeceleration" "3"
 +   Option          "ButtonMapping" "1 0 3 4 5 6 7 8 9"
 +EndSection
 +</file>
 +
 +<WRAP info>
 +**NOTE:** 
 +
 +  * The filename can be anything similar.
 +
 +  * **Identifier**:  Can be anything.
 +  * **MatchProduct**:  Product name from xinput list.
 +  * **Option**:  The options to change.
 +
 +</WRAP>
 +
 +
 +----
 +
 +===== References =====
 +
 +https://wayland.freedesktop.org/libinput/doc/latest/pointer-acceleration.html#ptraccel-linear
 +
 +https://wiki.archlinux.org/title/Mouse_acceleration
 +
 +https://newbedev.com/decrease-mouse-sensitivity-below-the-standard-limit
ubuntu/mouse/change_mouse_sensitivity.1635243036.txt.gz · Last modified: 2021/10/26 10:10 by peter
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