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Bug#622707: xserver-xorg-input-synaptics: touchpad wrongly detected as multitouch leads to sync problems



Package: xserver-xorg-input-synaptics
Version: 1.4.0-1
Severity: important

I have been having serious issues with my synaptics touchpad with 
version 1.4.0, causing severe disruptions and lagging. Xorg.log shows 
several errors that I had been dismissing, until upon looking carefully 
I saw my touchpad is being detected as multitouch, but this can't be!, 
my laptop is over 6 years old. X kept probing without success for a 
synaptics multitouch touchpad. This was directly related to the Kernel 
throwing the below debug messages. I didn't know how to block synaptics 
from detecting the wrong touchpad, so I simply decided to uninstall the 
xserver-xorg-input-synaptics package and now my touchpad is working 
correctly without losing sync.

Touchpad works fine when X detects it as ImPS/2 Synaptics TouchPad. But 
fails terribly with SynPS/2 or PS/2

Apr 10 23:55:17 debturion kernel: [  204.009286] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 4
Apr 10 23:55:17 debturion kernel: [  204.010682] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 10 23:55:17 debturion kernel: [  204.020567] psmouse.c: TouchPad at isa0060/serio4/input0 - driver resynched.
Apr 10 23:56:14 debturion kernel: [  261.085403] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 4
Apr 10 23:56:14 debturion kernel: [  261.087078] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 10 23:56:14 debturion kernel: [  261.088873] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 10 23:56:14 debturion kernel: [  261.090482] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 10 23:56:14 debturion kernel: [  261.091965] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 10 23:56:14 debturion kernel: [  261.091968] psmouse.c: issuing reconnect request
Apr 11 00:04:16 debturion kernel: [  743.689695] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 4
Apr 11 00:04:16 debturion kernel: [  743.691560] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 11 00:04:16 debturion kernel: [  743.692887] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 11 00:04:16 debturion kernel: [  743.695127] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 11 00:04:16 debturion kernel: [  743.697146] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 11 00:04:16 debturion kernel: [  743.697153] psmouse.c: issuing reconnect request
Apr 11 00:04:18 debturion kernel: [  745.529577] Synaptics Touchpad, model: 1, fw: 6.2, id: 0x1a0b1, caps: 0xa04713/0x200000/0x0
Apr 11 00:04:18 debturion kernel: [  745.600788] input: SynPS/2 Synaptics TouchPad as /devices/platform/i8042/serio4/input/input10
Apr 11 00:08:54 debturion kernel: [ 1021.431538] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 4
Apr 11 00:08:54 debturion kernel: [ 1021.432895] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 11 00:08:54 debturion kernel: [ 1021.435194] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 11 00:08:54 debturion kernel: [ 1021.436493] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 11 00:08:54 debturion kernel: [ 1021.438211] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 11 00:08:54 debturion kernel: [ 1021.438214] psmouse.c: issuing reconnect request
Apr 11 00:09:14 debturion kernel: [ 1041.146393] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 4
Apr 11 00:09:14 debturion kernel: [ 1041.147890] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 11 00:09:14 debturion kernel: [ 1041.149812] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 11 00:09:14 debturion kernel: [ 1041.151279] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 1
Apr 11 00:09:14 debturion kernel: [ 1041.155714] psmouse.c: Failed to reset mouse on isa0060/serio1
Apr 11 00:09:14 debturion kernel: [ 1041.161134] psmouse.c: TouchPad at isa0060/serio4/input0 lost sync at byte 4
Apr 11 00:09:14 debturion kernel: [ 1041.161136] psmouse.c: issuing reconnect request
Apr 11 00:09:14 debturion kernel: [ 1041.350093] input: PS/2 Generic Mouse as /devices/platform/i8042/serio1/input/input11
Apr 11 00:09:14 debturion kernel: [ 1041.376111] psmouse.c: Failed to enable mouse on isa0060/serio1

-- System Information:
Debian Release: wheezy/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.38-2-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash

Versions of packages xserver-xorg-input-synaptics depends on:
ii  libc6                         2.11.2-11  Embedded GNU C Library: Shared lib
ii  libx11-6                      2:1.4.2-1  X11 client-side library
ii  libxi6                        2:1.4.2-1  X11 Input extension library
ii  libxtst6                      2:1.2.0-1  X11 Testing -- Record extension li
ii  xserver-xorg-core [xorg-input 2:1.9.5-1  Xorg X server - core server

xserver-xorg-input-synaptics recommends no packages.

Versions of packages xserver-xorg-input-synaptics suggests:
pn  gpointing-device-settings     <none>     (no description available)
pn  touchfreeze                   <none>     (no description available)



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