kota.nz notes vids pics code about
Mouse acceleration is awful… Unless you’re using a trackpad, then it’s essential. Here’s how to make your trackpack accelerated while keeping your mice (mouses?) on a flat profile.
ls /etc/X11/xorg.conf.d/ will list your X11 configurations (some distros might
change this path). Typically, these configurations will begin with a number. The
files are loaded alphabetically so the numbers are just a clever way to set the
load order. We just need to create a file named
/etc/X11/xorg.conf.d/50-mouse-acceleration.conf with the following.
Section "InputClass" Identifier "My Mouse" MatchIsTouchpad "no" MatchIsPointer "yes" Option "AccelerationProfile" "-1" Option "AccelerationScheme" "none" Option "AccelSpeed" "-1" EndSection
Breaking this down, we have an
Identifier which is purely for your reference
and doesn’t change anything (but is required for some reason?). Then we have two
MatchIsTouchpad "no" and
MatchIsPointer "yes". Basically, we’re
telling X11 to apply this config to any device that isn’t a “Touchpad”, but is
still a generic “Pointer” of some kind. This is perfect because it will match
any random mouse we plug into our machine, but ignore the trackpad.
The last three options are a little weird AND there’s a newer alternative you could use instead.
Section "InputClass" Identifier "My Mouse" Driver "libinput" MatchIsTouchpad "no" MatchIsPointer "yes" Option "AccelProfile" "flat" Option "AccelSpeed" "0" EndSection
The first method is a little bit of a hack (it will completely disable mouse acceleration, but it’s weird to read). The newer method might not work on weird old X11 installs so it’s good to be aware of both methods.
If for some reason this just isn’t working at all it’s probably because your trackpad isn’t properly being detected as a “trackpad”. You can just create more specific selectors, even down to having different “profiles” for your different mice if you wanted.
First you need to figure out some information about your input devices with the following command.
$ xinput list ⎡ Virtual core pointer id=2 [master pointer (3)] ⎜ ↳ Virtual core XTEST pointer id=4 [slave pointer (2)] ⎜ ↳ Synaptics TM2668-002 id=12 [slave pointer (2)] ⎜ ↳ TPPS/2 IBM TrackPoint id=13 [slave pointer (2)] ⎜ ↳ Logitech M325 id=14 [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)] ↳ Integrated Camera: Integrated C id=9 [slave keyboard (3)] ↳ AT Translated Set 2 keyboard id=10 [slave keyboard (3)] ↳ ThinkPad Extra Buttons id=11 [slave keyboard (3)]
Now you can print a huge slew of info about any of these with
xinput list-props 14 (obviously replace 14 with the ID you want info about. In my case
a big list of properties for my mouse. We can find all of xorg’s information
about matching input devices in the INPUTCLASS SECTION of
man 5 xorg.conf
which you can read online
In my case I could use
MatchProduct "Logitech" instead of
MatchIsTouchpad "no" to select my wireless logitech mouse.