Ubuntu
xserver-xorg-input-evdev package

  1. Bug #1084938
  2. Comment #6

Comment 6 for bug 1084938

Revision history for this message
Trent Piepho (tpiepho) wrote : Re: evdev settings doesn't work at all

Upon looking at the code in evdev, it's clear the third button emulation is completely non-functional for multitouch devices.

The emulation is triggered by calling Evdev3BEmuFilterEvent() from EvdevPostQueuedEvents() in evdev.c. This is done for events of type EV_QUEUE_BTN only. With a multitouch touchscreen, events of this type aren't generated. Instead, the events are EV_QUEUE_TOUCH, which will never trigger the 3BEmu code.

These touch events don't work the same way as button events, so it's not a simple matter of passing them to Evdev3BEmuFilterEvent() too.