#8 from Kai-Heng Feng (kaihengfeng) fixed the issue for me on Lenovo P72
Intel® Core™ i7-8750H running Ubuntu 18.10 kernel 4.18.0-15-generic
#16-Ubuntu SMP. I added the following line to my /etc/default/grub
GRUB_CMDLINE_LINUX="psmouse.elantech_smbus=0"
then ran "sudo update-grub" in the usual way and track pad and buttons
work now.
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https://bugs.launchpad.net/bugs/1803600
Title:
Elantech - Touchpad not working after upgrading to 18.10 from 18.04
Status in linux package in Ubuntu:
Confirmed
Bug description:
Confirmed affected laptops:
ThinkPad:
L480
L580
P72
P52
When updating from 18.04 to 18.10 on a ThinkPad L480 the Elantech touchpad
stopped working. This means it is not recognized at all. This problem occured
after the first boot in 18.10
`dmesg | grep -i elantech` shows the following errors:
[3.409043] psmouse serio1: elantech: assuming hardware version 4
(with firmware version 0x5f3001)
[3.427372] psmouse serio1: elantech: Synaptics capabilities query
result 0x90, 0x18, 0x10.
[3.447275] psmouse serio1: elantech: Elan sample query result 00, 23,
c8
[3.464905] psmouse serio1: elantech: Trying to set up SMBus access
[5.576149] elan_i2c 0-0015: 0-0015 supply vcc not found, using dummy
regulator
[5.586505] elan_i2c 0-0015: failed to get resolution: -71
[5.586527] elan_i2c: probe of 0-0015 failed with error -71
uname:
$ uname -a
Linux test 4.18.0-10-generic #11-Ubuntu SMP Thu Oct 11 15:13:55 UTC 2018
x86_64 x86_64 x86_64 GNU/Linux
I found the following thread which solves the problem temporarly (and reports
the same problem in Arch):
https://bugs.archlinux.org/task/59714
Running the following command enables it again for the current
session:
sudo sh -c 'echo -n "elantech">
/sys/bus/serio/devices/serio1/protocol'
dmesg afterwards:
[ 569.522490] psmouse serio1: elantech: assuming hardware version 4
(with firmware version 0x5f3001)
[ 569.544584] psmouse serio1: elantech: Synaptics capabilities query
result 0x90, 0x18, 0x10.
[ 569.565939] psmouse serio1: elantech: Elan sample query result 00, 23,
c8
Before running the fix:
$ cat /sys/bus/serio/devices/serio1/protocol
ETSMBus
and after:
$ cat /sys/bus/serio/devices/serio1/protocol
ETPS/2
After reboot the command has to be run again, of course.
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: xorg 1:7.7+19ubuntu8
ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
Uname: Linux 4.18.0-11-generic x86_64
ApportVersion: 2.20.10-0ubuntu13.1
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: KDE
Date: Thu Nov 15 20:59:36 2018
DistUpgraded: 2018-11-10 09:56:53,358 DEBUG icon theme changed, re-reading
DistroCodename: cosmic
DistroVariant: ubuntu
DkmsStatus:
virtualbox, 5.2.18, 4.15.0-38-generic, x86_64: installed
virtualbox, 5.2.18, 4.18.0-10-generic, x86_64: installed
virtualbox, 5.2.18, 4.18.0-11-generic, x86_64: installed
GraphicsCard:
Intel Corporation UHD Graphics 620 [8086:5917] (rev 07) (prog-if 00 [VGA
controller])
Subsystem: Lenovo UHD Graphics 620 [17aa:506a]
InstallationDate: Installed on 2018-08-06 (101 days ago)
InstallationMedia: Xubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64
(20180725)
MachineType: LENOVO 20LS001AGE
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.18.0-11-generic
root=UUID=a1f97298-a2b8-469d-80ed-7497c6e6 ro quiet splash vt.handoff=1
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to cosmic on 2018-11-10 (5 days ago)
dmi.bios.date: 02/09/2018
dmi.bios.vendor: LENOVO
dmi.bios.version: R0QET37W (1.14 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20LS001AGE
dmi.board.vendor: LENOVO
dmi.board.version: SDK0J40697 WIN
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias:
dmi:bvnLENOVO:bvrR0QET37W(1.14):bd02/09/2018:svnLENOVO:pn20LS001AGE:pvrThinkPadL480:rvnLENOVO:rn20LS001AGE:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone:
dmi.product.family: ThinkPad L480
dmi.product.name: 20LS001AGE
dmi.product.sku: LENOVO_MT_20LS_BU_Think_FM_ThinkPad L480
dmi.product.version: ThinkPad L480
dmi.sys.vendor: LENOVO
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.95-1
version.libgl1-mesa-dri: libgl1-mesa-dri 18.2.4-0~b~padoka0
version.libgl1-mesa-glx: libgl1-mesa-glx 18.2.4-0~b~padoka0
version.xserver-xorg-core: xserver-xorg-core 2:1.20.1-3ubuntu2.1
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati:
