Final report:
1) I have removed my hacks to the mouse config setup and rebooted several
kernels. The kernel used by 15.04
is buggy and does not properly support
MatchProduct "PS/2 Synaptics TouchPad"
and
Option "Emulate3Buttons" "0"
The buttons work properly with earlier kernels
3.19.0-42-generic
and later kernels
4.5.0-040500rc3-generic
but not with
4.2.0-30-generic
To fully work, it was necessary to upgrade the BIOS (described earlier in this
bug report) and then turn off the
synaptics TouchPad in the bios setup.
If the touchpad is left on (in the BIOS), then the mouse jumps around every now
and then, when the palm of my right hand
touched the touchpad.
The software suppression of the touch-pad was not sufficient to keep the mouse
from randoming leaving focus of the window I was typing in. For example, I
would be responding to an email and the focus would be lost at random times,
because my palm would touch the synaptics touch-pad. This rendered the touchpad
unuseable.
Hence I found it necessary to turn it off, in the BIOS
Summary: With the early 3.19 and later 4.5 kernels, the mouse button sticking
problem is resolved, but with the 4.2 kernel,
it is sticking on, when pressed, at random times. This renders the computer
unuseable for daily work.
Thus the problem seems to be solved with the 4.5 kernels (and with the older
kernel, with the further requirement I turn off
the touchpad in the BIOS.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/1506817
Title:
left TPP/2 IBM TrackPoint "sticks on" randomly (X250 15.04)
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