Touchpad input doesn't work after longer suspend.

[Michał Sawicz]

When I resume my laptop from a longer (not sure what the threshold is yet) suspend, I don't get input from the touchpad, a short suspend cycle fixes it.

Touchscreen works all the time.

ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: gnome-shell 3.26.0-0ubuntu1
ProcVersionSignature: Ubuntu 4.12.0-13.14-generic 4.12.10
Uname: Linux 4.12.0-13-generic x86_64
NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
ApportVersion: 2.20.7-0ubuntu1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Sep 21 14:20:56 2017
DisplayManager: gdm3
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel van Vugt (vanvugt)]

Please install 'evtest':

   sudo apt install evtest

and then test your touchpad before and after suspending by running:

   sudo evtest

Does evtest still show events after suspend? (I'm wondering if the kernel isn't sending them or libinput or above is ignoring them)

[Jonathan Elchison (jelchison)]

In my case, evtest succeeds before suspend. Then provides no data after suspend. Last line that prints is "Testing ..."

[Daniel van Vugt (vanvugt)]

Jonathan, that confirms you have a kernel issue.

The direction of this bug however depends on what saviq says...

[Jonathan Elchison (jelchison)]

Concur, thanks for the guidance. This touchpad behavior seems to have been introduced between 4.10.0-37-generic and 4.13.0-16-generic.

Other folks experiencing this issue should attempt booting into your last-known-good kernel.

[Jeppe Bundsgaard (jeppe)]

It helped booting into 4.10.0-37. The touchpad now works after suspend.

[Daniel van Vugt (vanvugt)]

Thanks Jeppe. Since you have figured that out I've reopened and reassigned your bug 1729391 to the kernel.

[Jeppe Bundsgaard (jeppe)]

Kernel 4.14.0 and 4.13.12 fixes the problem. Thanks!

[Michał Sawicz (saviq)]

Confirmed, I haven't seen this issue in a while.