Arch Linux

metroidman

Member

Registered: 2020-08-23

Posts: 4

Lenovo thinkpad t420s power/touchpad issue

first off sorry for being so vague over what kind of output i can give i dont know where to start troubleshooting this issue as i did not have it before

my issue is that whenever i plug in the charger for my lenovo thinkpad t420s the touchpad stops working or is sluggish and starts jumping, hence it is not smooth at all and sometimes barely even moves

i did a fresh install of arch on an encrypted linux hardened kernel and i did only come to this issue with my new install im not sure if the kernel updated from last version

however i can not revert back and am since stuck with this issue

i will provide all the necessary outputs asap as soon as i know what to specifically look for

EDIT: as i got my audio up along the install, the charger kept beeping with the battery in as it was trying to charge, however after booting up without the battery the touchpad issue is still relevant

thank you
-Regards metroidman

Last edited by metroidman (2020-08-23 15:16:11)

ChainedGhost

Member

Registered: 2020-09-03

Posts: 1

Re: Lenovo thinkpad t420s power/touchpad issue

Have you followed this?
https://wiki.archlinux.org/index.php/Touchpad_Synaptics

I use the following which turns edge scrolling off and uses natural scrolling.  I also slowed it down a bit and it feels pretty good to me.

Section "InputClass"
    Identifier "touchpad"
    Driver "synaptics"
    MatchIsTouchpad "on"
        Option "TapButton1" "1"
        Option "TapButton2" "3"
        Option "TapButton3" "2"
        Option "VertTwoFingerScroll" "on"
        Option "HorizTwoFingerScroll" "on"
        Option "CircularScrolling" "on"
        Option "CircScrollTrigger" "2"
        Option "EmulateTwoFingerMinZ" "40"
        Option "EmulateTwoFingerMinW" "8"
        Option "CoastingSpeed" "0"
        Option "FingerLow" "34"
        Option "FingerHigh" "52"
        Option "MaxTapTime" "125"
        Option "VertScrollDelta" "-181"
        Option "HorizScrollDelta" "-181"
EndSection