Elantech Touchpad not working on Fujitsu E5410

[Peter Smith]

The Fujitsu E5410 (model type 5E14A1 according to the bottom sticker) is supplied with an Elantech(?) Touchpad. This apparently requires i2c_hid and does not properly work in Ubuntu 20.04. It seems also to interfere with the (internal) keyboard.

Problem behavior:

booting Ubuntu 20.04 with kernel 5.11.0-27:
keyboard works, touchpad is not recognized.
Running sudo modprobe i2c_hid manually from a terminal sometimes results in the touchpad working. Sometimes however the keyboard does not recognize any input anymore. After rebooting, approx 1/2 times the keyboard is not working anymore.

Making sudo modprobe i2c_hid permanent via /etc/modules-load.d/ permanently crashes the keyboard on startup such that it is impossible to log in.

booting with kernel 5.14.0-1004-oem:
sudo modprobe i2c_hid has no effect, the touchpad is never recognized. Booting with this kernel, 9/10 times the keyboard is not recognized at all and one cannot log in. Permanently loading the module via /etc/modules-load.d has no effect.

booting with kernel 5.14.9-051409 (a mainline kernel from ppa:tuxinvader/lts-mainline ):
modprobing the i2c_hid module has no effect. The keyboard works.

probably not just xserver-xorg-input-libinput but also i2c_hid is affected. However w.r.t. https://wiki.ubuntu.com/DebuggingTouchpadDetection and without being able to further diagnose the problem I filed this bug against xserver-xorg-input-libinput.

(likely) relevant output of cat /proc/bus/input/devices:

I: Bus=0018 Vendor=04f3 Product=308a Version=0100
N: Name="0X45 0X4C 0X41 0X4E 04F3:308A Touchpad"
P: Phys=i2c-0X45 0X4C 0X41 0X4E 0X30 0X44 0X30 0X30 0X00:00
S: Sysfs=/devices/pci0000:00/0000:00:15.3/i2c_designware.1/i2c-2/i2c-0X45 0X4C 0X41 0X4E 0X30 0X44 0X30 0X30 0X00:00/0018:04F3:308A.0002/input/input26
U: Uniq=
H: Handlers=mouse2 event14
B: PROP=1
B: EV=1b
B: KEY=e520 30000 0 0 0 0
B: ABS=2e0800000000003
B: MSC=20

I: Bus=0018 Vendor=04f3 Product=308a Version=0100
N: Name="0X45 0X4C 0X41 0X4E 04F3:308A Mouse"
P: Phys=i2c-0X45 0X4C 0X41 0X4E 0X30 0X44 0X30 0X30 0X00:00
S: Sysfs=/devices/pci0000:00/0000:00:15.3/i2c_designware.1/i2c-2/i2c-0X45 0X4C 0X41 0X4E 0X30 0X44 0X30 0X30 0X00:00/0018:04F3:308A.0002/input/input24
U: Uniq=
H: Handlers=mouse1 event13
B: PROP=0
B: EV=17
B: KEY=30000 0 0 0 0
B: REL=3
B: MSC=10

I: Bus=0011 Vendor=0001 Product=0001 Version=ab54
N: Name="AT Translated Set 2 keyboard"
P: Phys=isa0060/serio0/input0
S: Sysfs=/devices/platform/i8042/serio0/input/input2
U: Uniq=
H: Handlers=sysrq kbd event2 leds
B: PROP=0
B: EV=120013
B: KEY=402000000 3803078f800d001 feffffdfffefffff fffffffffffffffe
B: MSC=10
B: LED=7

I: Bus=0019 Vendor=0000 Product=0000 Version=0000
N: Name="Fujitsu FUJ02E3"
P: Phys=FUJ02E3/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/FUJ02E3:00/input/input7
U: Uniq=
H: Handlers=rfkill kbd event3
B: PROP=0
B: EV=13
B: KEY=40000 0 0 0 0 181000000000c00 300000 0 0
B: MSC=10

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xserver-xorg-input-libinput 0.29.0-1
ProcVersionSignature: Ubuntu 5.11.0-27.29~20.04.1-generic 5.11.22
Uname: Linux 5.11.0-27-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.20
Architecture: amd64
BootLog: Error: [Errno 13] Keine Berechtigung: '/var/log/boot.log'
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Mon Oct 25 13:50:39 2021
DistUpgraded: Fresh install
DistroCodename: focal
DistroVariant: ubuntu
InstallationDate: Installed on 2021-10-04 (21 days ago)
InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
Lsusb:
 Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
 Bus 001 Device 003: ID 04f2:b6a0 Chicony Electronics Co., Ltd FJ Camera
 Bus 001 Device 004: ID 8087:0026 Intel Corp.
 Bus 001 Device 002: ID 046d:c077 Logitech, Inc. M105 Optical Mouse
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: FUJITSU CLIENT COMPUTING LIMITED LIFEBOOK E5410
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no username)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-27-generic root=UUID=521e4756-042b-473e-adce-11bbb047275b ro quiet splash vt.handoff=7
SourcePackage: xserver-xorg-input-libinput
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/06/2021
dmi.bios.release: 2.20
dmi.bios.vendor: FUJITSU CLIENT COMPUTING LIMITED
dmi.bios.version: Version 2.20
dmi.board.name: FJNB2D6
dmi.board.vendor: FUJITSU CLIENT COMPUTING LIMITED
dmi.board.version: A2
dmi.chassis.type: 10
dmi.chassis.vendor: FUJITSU CLIENT COMPUTING LIMITED
dmi.chassis.version: LIFEBOOK E5410
dmi.modalias: dmi:bvnFUJITSUCLIENTCOMPUTINGLIMITED:bvrVersion2.20:bd07/06/2021:br2.20:svnFUJITSUCLIENTCOMPUTINGLIMITED:pnLIFEBOOKE5410:pvr10601736746:rvnFUJITSUCLIENTCOMPUTINGLIMITED:rnFJNB2D6:rvrA2:cvnFUJITSUCLIENTCOMPUTINGLIMITED:ct10:cvrLIFEBOOKE5410:
dmi.product.family: LIFEBOOK-FTS
dmi.product.name: LIFEBOOK E5410
dmi.product.sku: SK00
dmi.product.version: 10601736746
dmi.sys.vendor: FUJITSU CLIENT COMPUTING LIMITED
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.105-3~20.04.2
version.libgl1-mesa-dri: libgl1-mesa-dri 21.0.3-0ubuntu0.3~20.04.2
version.libgl1-mesa-glx: libgl1-mesa-glx N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.20.11-1ubuntu1~20.04.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:19.1.0-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.917+git20200226-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.16-1

[Peter Smith (foobar2001)]

additional info: the output of
sudo acpidump | grep -C3 ELAN
yields
   39D60: 0D 41 54 4D 4C 32 39 35 32 00 5F 48 49 44 70 00 .ATML2952._HIDp.
   39D70: 48 49 44 32 70 0A 4A 42 41 44 52 70 0C 80 1A 06 HID2p.JBADRp....
   39D80: 00 53 50 45 44 A4 00 A0 30 93 54 50 4C 54 0A 03 .SPED...0.TPLT..
   39D90: 70 0D 45 4C 41 4E 32 30 39 37 00 5F 48 49 44 70 p.ELAN2097._HIDp
   39DA0: 01 48 49 44 32 70 0A 10 42 41 44 52 70 0C 80 1A .HID2p..BADRp...
   39DB0: 06 00 53 50 45 44 A4 00 A0 30 93 54 50 4C 54 0A ..SPED...0.TPLT.
   39DC0: 04 70 0D 4E 54 52 47 30 30 30 31 00 5F 48 49 44 .p.NTRG0001._HID
--
   3A560: 54 0A 02 70 0D 41 54 4D 4C 32 39 35 32 00 5F 48 T..p.ATML2952._H
   3A570: 49 44 70 00 48 49 44 32 70 0A 4A 42 41 44 52 70 IDp.HID2p.JBADRp
   3A580: 0C 80 1A 06 00 53 50 45 44 A4 00 A0 30 93 54 50 .....SPED...0.TP
   3A590: 4C 54 0A 03 70 0D 45 4C 41 4E 32 30 39 37 00 5F LT..p.ELAN2097._
   3A5A0: 48 49 44 70 01 48 49 44 32 70 0A 10 42 41 44 52 HIDp.HID2p..BADR
   3A5B0: 70 0C 80 1A 06 00 53 50 45 44 A4 00 A0 30 93 54 p.....SPED...0.T
   3A5C0: 50 4C 54 0A 04 70 0D 4E 54 52 47 30 30 30 31 00 PLT..p.NTRG0001.
--
   3B530: 50 4C 54 0A 02 70 0D 41 54 4D 4C 32 39 35 32 00 PLT..p.ATML2952.
   3B540: 5F 48 49 44 70 00 48 49 44 32 70 0A 4A 42 41 44 _HIDp.HID2p.JBAD
   3B550: 52 70 0C 80 1A 06 00 53 50 45 44 A4 00 A0 30 93 Rp.....SPED...0.
   3B560: 54 50 4C 54 0A 03 70 0D 45 4C 41 4E 32 30 39 37 TPLT..p.ELAN2097
   3B570: 00 5F 48 49 44 70 01 48 49 44 32 70 0A 10 42 41 ._HIDp.HID2p..BA
   3B580: 44 52 70 0C 80 1A 06 00 53 50 45 44 A4 00 A0 30 DRp.....SPED...0
   3B590: 93 54 50 4C 54 0A 04 70 0D 4E 54 52 47 30 30 30 .TPLT..p.NTRG000

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.