/70-synaptics.conf
Last active Nov 25, 2017
| # Inspired by https://www.x.org/wiki/Development/Documentation/PointerAccelerationAsOf16/ | |
| # See http://who-t.blogspot.com/2016/09/synaptics-pointer-acceleration.html for synaptics insanity | |
| Section "InputClass" | |
| Identifier "touchpad" | |
| # Use synaptics because libinput is broken: it fails to initiate cursor | |
| # movement when touching starts at some edges and corners, and it makes | |
| # assumptions about whether we need palm and thumb detection based | |
| # on the size of our touchpad. I was unable to fix these issues by | |
| # patching libinput to disable palm/thumb detection and the horizontal | |
| # scrolling area. | |
| Driver "synaptics" | |
| MatchIsTouchpad "on" | |
| # xorg already has mouse acceleration ("pointer feedback"), so don't | |
| # let synaptics change speed. | |
| Option "MinSpeed" "1.0" | |
| Option "MaxSpeed" "1.0" | |
| # Default is 200/((WIDTH**2+HEIGHT**2)**0.5) and it may be better not | |
| # to mess with AccelFactor. | |
| # Option "AccelFactor" "0.03" | |
| # synaptics is too sensitive in general and MinSpeed=1.0 MaxSpeed=1.0 | |
| # makes it worse, so use ConstantDeceleration (this is just a divisor!) | |
| # to slow it down to make precise movement possible. | |
| # | |
| # See also https://bugs.freedesktop.org/show_bug.cgi?id=38998 | |
| # ("Synaptics driver imposes minimum speed") | |
| Option "ConstantDeceleration" "3" | |
| # We've slowed down the cursor quite a bit, so we need more than the | |
| # default acceleration of 2/1 to move it across the screen; add this | |
| # to ~/.xinitrc: | |
| # | |
| # xset m 4/1 0 | |
| # | |
| # If your screen is big (these parameters were tested on 13" 1600x900), | |
| # you may need to increase the acceleration or decrease the | |
| # ConstantDeceleration so that you can flick the cursor across the screen. | |
| # Adjust based on whether you have physical touchpad buttons, etc. | |
| Option "TapButton1" "1" | |
| Option "TapButton2" "0" | |
| Option "TapButton3" "0" | |
| Option "VertTwoFingerScroll" "0" | |
| Option "HorizTwoFingerScroll" "0" | |
| Option "VertEdgeScroll" "1" | |
| Option "CoastingSpeed" "20" | |
| Option "CornerCoasting" "0" | |
| Option "CircularScrolling" "0" | |
| Option "EdgeMotionUseAlways" "0" | |
| EndSection |
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tl;dr this solves (or does it best to solve) three problems: 1) there are two layers of acceleration (synaptics and xorg) 2) synaptics is too fast and has a minimum speed 3) xorg acceleration is too slow https://www.x.org/wiki/Development/Documentation/PointerAcceleration/ http://who-t.blogspot.com/2016/09/synaptics-pointer-acceleration.html |
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ivan
Nov 25, 2017
You can check that the proper acceleration was applied with xinput:
xinput get-feedbacks "SynPS/2 Synaptics TouchPad"
(It may be overridden by a desktop environment e.g. xfce4, so you may need to rm ~/.config/xfce4/xfconf/xfce-perchannel-xml/pointers.xml or configure the acceleration in the desktop environment.)
|
You can check that the proper acceleration was applied with (It may be overridden by a desktop environment e.g. xfce4, so you may need to |
tl;dr this solves (or does it best to solve) three problems: 1) there are two layers of acceleration (synaptics and xorg) 2) synaptics is too fast and has a minimum speed 3) xorg acceleration is too slow
https://www.x.org/wiki/Development/Documentation/PointerAcceleration/
http://who-t.blogspot.com/2016/09/synaptics-pointer-acceleration.html