Comment 16 for bug 1506817

Christopher,
Here is an important update:

When you sent this email on Jan 21, my X250 was back in Memphis being
repaired (A problem with the screen blanking off, randomly). Thus I
couldn't test anything at that time.

I now have the X250 back in my hands and the screen problems is fixed.

However, today (Feb 4, 2016) the mouse sticking problem has returned!!!
This occured immedideatly following a system update, which required a
reboot. Following the reboot, the mouse sticking problem returned.

I'm not sure how to evaluate the situation given the random return of
the problem. I verified that the two modifications were in place

1) /etc/modprobe.d/psmouse.conf
options psmouse proto=imps
2) /usr/share/X11/xorg.conf.d/90-evdev.conf
Section "InputClass"
     Identifier "Touchpad/TrackPoint"
     MatchProduct "PS/2 Synaptics TouchPad"
     MatchDriver "evdev"
     Option "EmulateWheel" "1"
     Option "EmulateWheelButton" "2"
     Option "Emulate3Buttons" "0"
     Option "XAxisMapping" "6 7"
     Option "YAxisMapping" "4 5"
EndSection
3) Reboot

but with these modifications, the left mouse button now sticks on about
once every 20 clicks (a rough estimate), rendering the computer
virtually useless for everyday use.

This problem was resolved since my first posting, but has now creeped
back to haunt me.

Any advice you can give me would be appreciated.

My previous conclusion was that the synaptics driver is the source of
this problem. There is evidence that it is now present, but I'm not in a
position to spend a day debugging this right now. When I boot the
computer, before I login, the synaptics pad is live. I have turned it
off in the BIOS, yet it lives following a boot. Once I have logged in,
it is turned off. I suspect this is a clue, but I dont know how to read it.

The situation is bad enough that I may need to switch back to my
previous X220i computer, which is an equally bad alternative.
The X220i runs 14.04 LS, and does not have the mouse-sticking problem,
as it does not have the synaptics driver (as best I know).

The X250 is using Ubuntu 15.04
Linux near 4.2.0-27-generic #32-Ubuntu SMP Fri Jan 22 04:49:08 UTC 2016
x86_64 x86_64 x86_64 GNU/Linux

I figured out how to boot the X250 from the X220i hard drive using a USB
adapter, which seems a useful debugging technique.

I hope my summary above is both correct and adequate.

On 01/21/2016 06:41 PM, Christopher M. Penalver wrote:
> Jont Allen, to clarify, for your WORKAROUND do you only need to perform:
> 1) /etc/modprobe.d/psmouse.conf
> Add to this file
> options psmouse proto=imps
>
> or do you have to do 2) also?
>
> ** Changed in: linux (Ubuntu)
> Status: Confirmed => Incomplete
>