Option EmulateThirdButtonTimeout does not work

[Leonardo Soares Müller]

I am trying to configure the following touchscreen:

Bus 004 Device 002: ID 22b9:0005 eTurboTouch Technology, Inc.

And I have noticed that the option EmulateThirdButtonTimeout has no effect if set to a value above 750. If set to lower values, as 500, 250 or even 1, the behaviour changes, but values above 750 have no effect, keeping the behaviour as 750. I would like to set to a higher value, as 2000, for example.

Also, it creates a second device, identified as a mouse, that has no function, but the system tries to use by default, requiring a Xorg configuration to ignore it.

This touchscreen doesn't work with libinput, working only with evdev. The current Xorg configuration contains:

Section "InputClass"
        Identifier "HID Touchscreen"
        MatchUSBID "22b9:0005"
        Driver "evdev"
        Option "EmulateThirdButton" "1"
        Option "EmulateThirdButtonTimeout" "2500"
        Option "EmulateThirdButtonThreshold" "20"
        Option "Emulate3Buttons" "false"
        Option "ButtonMapping" "1 3 3 0 0 0 0 0 0 0 0 0 0 0"
EndSection

Section "InputClass"
        Identifier "TouchButMouse"
        MatchProduct "HID TOUCH HID Touch Panel Mouse"
        Option "Ignore" "true"
EndSection

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xserver-xorg-input-evdev-hwe-18.04 1:2.10.6-1~18.04.1
ProcVersionSignature: Ubuntu 5.3.0-42.34~18.04.1-generic 5.3.18
Uname: Linux 5.3.0-42-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.11
Architecture: amd64
CurrentDesktop: XFCE
Date: Mon Mar 16 16:09:00 2020
SourcePackage: xserver-xorg-input-evdev-hwe-18.04
UpgradeStatus: No upgrade log present (probably fresh install)