I can also confirm that this affects the Lenovo ThinkPad Carbon 5th gen.
After resuming from suspend to ram the touchpad is broken -- two-finger
gesture doesn't work.
$ sudo dmidecode -t system | grep -i "system information" -A 3
System Information
Manufacturer: LENOVO
Product Name: 20HRS14W00
Version: ThinkPad X1 Carbon 5th
A temporary workaround is to reload the module "psmouse" after resume.
$ sudo modprobe -r psmouse && sudo modprobe psmouse
Disabling the blacklisting of module "i2c_i801" as suggested by kaihengfeng
(thanks!) does fix the issue for good.
$ sudo sed -i 's/^blacklist\ i2c_i801/#blacklist\ i2c_i801/g'
/etc/modprobe.d/blacklist.conf
Some other thoughts:
* Review if the fix for #16602 is still pertinent (the blacklisting of i2c_i801
was apparently added for a machine which is now almost 15 years old and wrongly
refers to Ubuntu bug #10306)
* The blacklisting of i2c_i801 also break some other things, see #1475945
(blacklisting i2c_i801 breaks trackpad detection on Acer C710, plus other
hardware)
* Confirm the link with kernel commit e839ffab028981ac77f650faf8c84f16e1719738
(cf.
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=e839ffab028981ac77f650faf8c84f16e1719738)
as suggested by kaihengfeng (also mentioned in kernel bug #196719 (cf.
https://bugzilla.kernel.org/show_bug.cgi?id=196719)
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https://bugs.launchpad.net/bugs/1722478
Title:
Two-finger scrolling no longer works after resuming from suspend
Status in Linux:
Confirmed
Status in linux package in Ubuntu:
Incomplete
Bug description:
I own a Thinkpad T440p onto which I have had Debian 9 running without
hardware issues. I have recently installed Ubuntu 17.10 final beta to
test it out, but two-finger scrolling does not work at the moment. It
used to work out-of-the-box from the final beta iso, but a subsequent
update broke it.
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: linux-image-4.13.0-12-generic 4.13.0-12.13 [modified:
boot/vmlinuz-4.13.0-12-generic]
ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3
Uname: Linux 4.13.0-12-generic x86_64
ApportVersion: 2.20.7-0ubuntu2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: ghislain 10620 F.... pulseaudio
/dev/snd/controlC0: ghislain 10620 F.... pulseaudio
CurrentDesktop: ubuntu:GNOME
Date: Tue Oct 10 09:20:01 2017
HibernationDevice: RESUME=UUID=ae4cca1e-80ef-4a1e-87e3-0a860b49492e
InstallationDate: Installed on 2017-10-05 (4 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170926)
MachineType: LENOVO 20AN00C1UK
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.13.0-12-generic
root=/dev/mapper/doc1485--lap--vg-root ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.13.0-12-generic N/A
linux-backports-modules-4.13.0-12-generic N/A
linux-firmware 1.169
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/31/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: GLET83WW (2.37 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20AN00C1UK
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50510 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias:
dmi:bvnLENOVO:bvrGLET83WW(2.37):bd03/31/2016:svnLENOVO:pn20AN00C1UK:pvrThinkPadT440p:rvnLENOVO:rn20AN00C1UK:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.family: ThinkPad T440p
dmi.product.name: 20AN00C1UK
dmi.product.version: ThinkPad T440p
dmi.sys.vendor: LENOVO
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