Skip to content

Inconsistent behaviour in relation to thumb rejection

Submitted by Peter Y. Chuang

Assigned to Wayland bug list

Link to original bug (#103809)

Description

Created attachment 135577 evemu-record of one-finger tap when thumb rejection is triggered

This is a follow-up to the discussion in bug103210 in relation to thumb detection.

When thumb detection is triggered with a light touch on the lower edge of the touchpad, one-finger tapping elsewhere on the touchpad is sometimes, but not always, registered as two-finger tapping, and two-finger tapping as three-finger tapping. This behaviour is similar to touch-size-based palm rejection in bug103210.

I've attached the evemu-record for the problem. Here are the steps to trigger the problem:

  1. Put a finger on the lower edge of the touchpad
  2. With the second finger, move the cursor a bit
  3. Lift the second finger with the first finger remaining on the lower edge of the touchpad
  4. Tap with the second finger

Note that this problem doesn't happen 100% of the time.

Attachment 135577, "evemu-record of one-finger tap when thumb rejection is triggered":
thumb-rejection-and-one-finger-tapping.txt

Depends on

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information