Lenovo touchpad (Synaptics) disabled after resume from suspend

Bug #366560 reported by JamesHowlett on 2009-04-25
This bug affects 2 people
Affects Status Importance Assigned to Milestone

Bug Description

Laptop is a Lenovo 3000 n100 0768-DLU
Core 2 Duo T5500 @ 1.66GHz, 15.4" WXGA (1280 x 800) 2GB of PC2-5300 DDR2 SDRAM, 120GB 5400-rpm Serial ATA (SATA) hard drive, DVD±RW Double Layer drive, 3945ABG (802.11a/b/g) Wi-Fi wireless

Ubuntu Release: 9.04

I found out that my /proc/bus/input/devices contains this entry BEFORE going into suspend:

I: Bus=0011 Vendor=0002 Product=0007 Version=01b1
N: Name="SynPS/2 Synaptics TouchPad"
P: Phys=isa0060/serio4/input0
S: Sysfs=/devices/platform/i8042/serio4/input/input10
U: Uniq=
H: Handlers=mouse2 event8
B: EV=b
B: KEY=6420 0 70000 0 0 0 0 0 0 0 0
B: ABS=11000003

However, AFTER resuming from suspend, the entry is missing.

if there's any more info required please feel free to contact me.

ProblemType: Bug
Architecture: i386
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/yelp
Package: yelp 2.25.1-0ubuntu5
SourcePackage: yelp
Uname: Linux 2.6.28-11-generic i686

JamesHowlett (spaz-account) wrote :
prun769 (prunand) wrote :

I am experiencing the same thing with Jaunty with the exact same laptop.

FraGe (fragebuntu) wrote :

late, but is this a copy of this one?

I've got the same thing on a Amilo Si1520 with a synaptics Touchpad.

The entry in /proc/bus/input/devices is there before the suspend, after resume. its gone, then I plug in a optical mouse, and there the optical mouse entry comes in. Plugging it in/out removes/brings back the entry, so it would be a fix to remove the touchpad ;) SCNR


madbiologist (me-again) wrote :

This might be fixed upstream in kernel 2.6.35-rc5. From the changelog:

commit 04a08885c36dc2f4663900d007b9d71a7e7f2b92
Author: Dmitry Torokhov
Date: Thu May 13 00:42:23 2010 -0700

    Input: psmouse - reset all types of mice before reconnecting

    commit ef110b24e28f36620f63dab94708a17c7e267358 upstream.

    Synaptics hardware requires resetting device after suspend to ram
    in order for the device to be operational. The reset lives in
    synaptics-specific reconnect handler, but it is not being invoked
    if synaptics support is disabled and the device is handled as a
    standard PS/2 device (bare or IntelliMouse protocol).

    Let's add reset into generic reconnect handler as well.

    Signed-off-by: Dmitry Torokhov
    Cc: Tim Gardner
    Signed-off-by: Greg Kroah-Hartman

A PPA of this kernel can be found at http://kernel.ubuntu.com/~kernel-ppa/mainline/

madbiologist (me-again) wrote :

Oops, that should be kernel Sorry.

Fabio Marconi (fabiomarconi) wrote :

Thank you for taking the time to report this bug and helping to make Ubuntu better.
Is this bug reproducible with the latest Lucid packages ?
Tanks in advance.

Changed in ubuntu:
status: New → Incomplete
Fabio Marconi (fabiomarconi) wrote :

 Thank you for taking the time to report this bug and helping to make Ubuntu better. This bug did not have a package associated with it, which is important for ensuring that it gets looked at by the proper developers. You can learn more about finding the right package at https://wiki.ubuntu.com/Bugs/FindRightPackage .

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://help.ubuntu.com/community/ReportingBugs.

Fabio Marconi (fabiomarconi) wrote :

We'd like to figure out what's causing this bug for you, but we haven't heard back from you in a while. Could you please provide the requested information? Thanks!

tags: added: jaunty lenovo-3000
Fabio Marconi (fabiomarconi) wrote :

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!

Changed in ubuntu:
status: Incomplete → Invalid
FraGe (fragebuntu) wrote :

I am sorry to answer that late but I have tried to suspend and resume just now for the first time since ... hmm ... a long time :)
On my Amilo Si1520 this bug seems to be resolved with Ubuntu 10.04.1

My kernel is 2.6.32-24-generic.

Thanks a lot - I didn't use suspend for that reason and thus forgot about the bug too.


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