I was also facing with my touchpad on Ubuntu 18.04 + KDE plasma, so removed i2c_i801 from blacklist & updating initramfs worked for me.
Can we remove this from blacklist in upcoming releases as it is very specific case of one brand? We should provide generic solution to handle this rather than hard coding this in conf to handle one brand issue. -- 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/1794876 Title: Touchpad doesn't work out-of-the-box in Ubuntu 18.04.1 with ThinkPad X1 carbon Status in linux package in Ubuntu: Confirmed Bug description: The touchpad doesn't work after installing Ubuntu 18.04.1 on a new Lenovo ThinkPad X1 Carbon laptop. I see log messages like these repeatedly: ``` Sep 27 15:41:17 jik-x1 kernel: [ 3.824013] psmouse serio2: Failed to reset mouse on synaptics-pt/serio0 Sep 27 15:41:17 jik-x1 kernel: [ 9.388812] psmouse serio2: Failed to enable mouse on synaptics-pt/serio0 Sep 27 15:41:30 jik-x1 kernel: [ 33.124787] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1 Sep 27 15:41:30 jik-x1 kernel: [ 33.126159] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1 Sep 27 15:41:30 jik-x1 kernel: [ 33.127437] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1 Sep 27 15:41:30 jik-x1 kernel: [ 33.132428] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1 Sep 27 15:41:30 jik-x1 kernel: [ 33.133608] psmouse serio1: TouchPad at isa0060/serio1/input0 lost sync at byte 1 Sep 27 15:41:30 jik-x1 kernel: [ 33.133613] psmouse serio1: issuing reconnect request ``` I also saw this on boot: ``` Sep 27 14:00:29 jik-x1 kernel: [ 3.405390] psmouse serio1: synaptics: Your touchpad (PNP: LEN0091 PNP0f13) says it can support a different bus. If i2c-hid and hid-rmi are not used, you might want to try setting psmouse.synaptics_intertouch to 1 and report this to linux-in...@vger.kernel.org. ``` The touchpad works for a second or two after it is reset and then stops working again. There are other bugs about this (e.g., https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1723986) but they claim the issue is fixed. To fix this I had to: 1. Remove `blacklist i2c_i801` from `/etc/modprobe.d/blacklist.conf`. 2. Update my initramfs after doing so. 3. Add `psmouse.synaptics_intertouch=1` to `GRUB_CMDLINE_LINUX_DEFAULT` in `/etc/default/grub`. 4. Update my grub configuration after doing so. 5. Reboot. Neither of these fixes by itself was sufficient. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: linux-image-4.15.0-34-generic 4.15.0-34.37 ProcVersionSignature: Ubuntu 4.15.0-34.37-generic 4.15.18 Uname: Linux 4.15.0-34-generic x86_64 ApportVersion: 2.20.9-0ubuntu7.4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC2: jik 4438 F.... pulseaudio /dev/snd/controlC1: jik 4438 F.... pulseaudio /dev/snd/controlC0: jik 4438 F.... pulseaudio CurrentDesktop: ubuntu:GNOME Date: Thu Sep 27 17:06:49 2018 HibernationDevice: RESUME=UUID=809b24c2-f7bc-493e-97dc-02bd6293d3bc InstallationDate: Installed on 2018-09-27 (0 days ago) InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725) MachineType: LENOVO 20KHCTO1WW ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-34-generic root=/dev/mapper/vgencrypted-lvencryptedroot ro quiet splash psmouse.synaptics_intertouch=1 vt.handoff=1 RelatedPackageVersions: linux-restricted-modules-4.15.0-34-generic N/A linux-backports-modules-4.15.0-34-generic N/A linux-firmware 1.173.1 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 08/31/2018 dmi.bios.vendor: LENOVO dmi.bios.version: N23ET55W (1.30 ) dmi.board.asset.tag: Not Available dmi.board.name: 20KHCTO1WW dmi.board.vendor: LENOVO dmi.board.version: SDK0J40709 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN23ET55W(1.30):bd08/31/2018:svnLENOVO:pn20KHCTO1WW:pvrThinkPadX1Carbon6th:rvnLENOVO:rn20KHCTO1WW:rvrSDK0J40709WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad X1 Carbon 6th dmi.product.name: 20KHCTO1WW dmi.product.version: ThinkPad X1 Carbon 6th dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1794876/+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