Fix Touchpad ChromeOs Brunch FrameWork

this problem is often found when the touchpad is detected in the command "cat /proc/bus/input/devices" but any movement on the touchpad doesn't work at all but clicks work, some have a blank screen when the touchpad is clicked

Problem

• I suspect that some of the touchpads lose resolution on Chromeos, it's because Chromeos itself doesn't extend enough for their drivers.

• and I suspect also that chromeos doesn't link some touchpads to the correct drivers, touchpads don't work properly due to lack of information given by the OS to the touchpad itself

Disclaimer

Not all touchpads support this way

Fixing

Open terminal Ctrl + Alt + T then shell

Then run this command

  sudo nano /etc/gesture/40-touchpad-cmt.conf

you should see an image like the one below, the code will be slightly different because I have edited mine

understand the code blocks!

We'll change the code in the first block, because that's where the core of the touchpad configuration.

Section "InputClass"
    Identifier      "touchpad"
    MatchIsTouchpad "on"
    MatchDevicePath "/dev/input/event*"
    Driver          "cmt"
    Option          "AccelerationProfile" "-1"
    Option          "Scroll Buttons" "0"
    Option          "Scroll Axes" "1"

    # CMT devices potentially process keyboard events
    Option          "XkbModel" "pc"
    Option          "XkbLayout" "us"
EndSection

the code above is the default code, we will add the code in the options.

Add code this

    Option          "Tap Minimum Pressure" "-15.0"
    Option          "Horizontal Resolution" "33"
    Option          "Vertical Resolution" "33"

    Option          "Two Finger Vertical Close Distance Thresh" "35.0"
    Option          "Fling Buffer Suppress Zero Length Scrolls" "0"

then the code will be like this

Section "InputClass"
    Identifier      "touchpad"
    MatchIsTouchpad "on"
    MatchDevicePath "/dev/input/event*"
    Driver          "cmt"
    Option          "AccelerationProfile" "-1"
    Option          "Scroll Buttons" "0"
    Option          "Scroll Axes" "1"

    Option          "Tap Minimum Pressure" "-15.0"
    Option          "Horizontal Resolution" "33"
    Option          "Vertical Resolution" "33"

    Option          "Two Finger Vertical Close Distance Thresh" "35.0"
    Option          "Fling Buffer Suppress Zero Length Scrolls" "0"

    # CMT devices potentially process keyboard events
    Option          "XkbModel" "pc"
    Option          "XkbLayout" "us"
EndSection

Actually the code that you have to add is the code in the second paragraph of the option

then Ctrl + X and Y last enter

reboot your CHROMEOS with type sudo reboot in terminal.

Enjoy with your TouchPad

Support

For support, email apipiirpan@gmail.com .