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.
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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:
USERPID ACCESS COMMAND
/dev/snd/controlC2: jik4438 F pulseaudio
/dev/snd/controlC1: jik4438 F pulseaudio
/dev/snd/controlC0: jik4438 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
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