====== Ubuntu - Mouse - Change Mouse Sensitivity ====== * [[Ubuntu:Mouse:Determine the Mouse|Determine the Mouse]]. ---- ===== Determine the system ===== xinput list-props 8 returns: 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): libinput Horizontal Scroll Enabled (308): 1 **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**. ---- ===== On Wayland/libinput systems ===== xinput --set-prop "Device Name" "libinput Accel Speed" -0.9 **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. ---- ===== On non-Wayland/libinput systems ===== xinput --set-prop "Device Name" "Device Accel Constant Deceleration" 5 **NOTE:** The lower the number the faster it will be, similarly, higher the number slower it will be. ---- ==== To turn off mouse acceleration ==== xinput --set-prop "Razer DeathAdder" "Device Accel Velocity Scaling" 1 xinput --set-prop "Razer DeathAdder" "Device Accel Profile" -1 ---- ===== Confirm any changes ===== xinput --list-props 8 **NOTE:** The 8 is the device-id per [[Ubuntu:Mouse:Determine the Mouse|Determine the Mouse]]. ---- ===== Using xset to change acceleration ===== xset can also be used to change acceleration. **NOTE:** xset does not use libinput. ---- ==== Get the current xset values ==== xset q | grep -A 1 Pointer returns: Pointer Control: acceleration: 2/1 threshold: 4 **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. ---- ==== Set new values ==== xset m acceleration threshold **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. xset m 3/2 0 To reduce mouse acceleration xset mouse 1 1 To increase the mouse speed xset mouse 10 1 ---- ==== Reset xset to the default settings ==== xset m default ---- ===== 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 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 **NOTE:** * The filename can be anything similar. * **Identifier**: Can be anything. * **MatchProduct**: Product name from xinput list. * **Option**: The options to change. ---- ===== 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