Inconsistent scroll direction on CAVE

[kstenerud]

I went to the settings for my touchpad and reversed the scroll direction, but many apps don't respect the setting.

Works as expected:

• Chromium
• File manager
• Settings

Doesn't respect the settings:

• Terminal
• Start menu

Chromebook model: CAVE

Firmware: mrchromebox (latest, updated this morning)

Installation method: chrx

[ghost]

This is a problem with Xfce's implementation (and definitely not CAVE), please confirm that it has been fixed upstream, if not report it there if it hasn't been already.

[kstenerud]

It turns out that this is a very old problem, with many variations of this fix.

• Make sure "Reverse scroll direction" is turned OFF (not on) in the "Mouse and Touchpad" settings. This setting only affects some programs and not others.
• Open a shell and get a list of xinput devices. For CAVE, you want "Elan Touchpad" (id 10):

  $ xinput list
  ⎡ Virtual core pointer                      id=2    [master pointer  (3)]
  ⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
  ⎜   ↳ Elan Touchscreen                          id=9    [slave  pointer  (2)]
  ⎜   ↳ Elan Touchpad                             id=10   [slave  pointer  (2)]
  ...

• Confirm which setting your touchpad has available. Older versions use "VertScrollDelta" (change to negative), newer versions use "Australian Scrolling" (change to 1):

  $ xinput list-props 10 |grep Scroll
  ...
  Australian Scrolling (443): 0
  ...

• Open your system's appropriate xorg config file (for CAVE: sudo nano /usr/share/X11/xorg.conf.d/50-touchpad-cmt-cave.conf) and add an Option line to your touchpad settings:

  Section "InputClass"
  Identifier      "touchpad elan cave"
  MatchIsTouchpad "on"
  MatchDevicePath "/dev/input/event*"
  MatchProduct    "Elan"
  
  Option          "Zero Finger Click Enable" "0"
  Option          "Australian Scrolling" "1"
  EndSection

• Reboot

[ghost]

closing, upstream