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) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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 To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1722478/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp