Touchpad not recognized

[Lina]

The touchpad stopped working and is not shown in the input devices. According to https://wiki.ubuntu.com/DebuggingTouchpadDetection is mean that it is a kernel bug.

$ cat /proc/bus/input/devices

I: Bus=0019 Vendor=0000 Product=0001 Version=0000
N: Name="Power Button"
P: Phys=PNP0C0C/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0C:00/input/input0
U: Uniq=
H: Handlers=kbd event0
B: PROP=0
B: EV=3
B: KEY=10000000000000 0

I: Bus=0019 Vendor=0000 Product=0003 Version=0000
N: Name="Sleep Button"
P: Phys=PNP0C0E/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0E:00/input/input1
U: Uniq=
H: Handlers=kbd event1
B: PROP=0
B: EV=3
B: KEY=4000 0 0

I: Bus=0019 Vendor=0000 Product=0005 Version=0000
N: Name="Lid Switch"
P: Phys=PNP0C0D/button/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0C0D:00/input/input2
U: Uniq=
H: Handlers=event2
B: PROP=0
B: EV=21
B: SW=1

I: Bus=0011 Vendor=0001 Product=0001 Version=ab83
N: Name="AT Translated Set 2 keyboard"
P: Phys=isa0060/serio0/input0
S: Sysfs=/devices/platform/i8042/serio0/input/input3
U: Uniq=
H: Handlers=sysrq kbd event3 leds
B: PROP=0
B: EV=120013
B: KEY=402000000 3803078f800d001 feffffdfffefffff fffffffffffffffe
B: MSC=10
B: LED=7

I: Bus=0019 Vendor=17aa Product=5054 Version=4101
N: Name="ThinkPad Extra Buttons"
P: Phys=thinkpad_acpi/input0
S: Sysfs=/devices/platform/thinkpad_acpi/input/input6
U: Uniq=
H: Handlers=rfkill kbd event4
B: PROP=0
B: EV=33
B: KEY=400000000010040 0 2018040000 7000000000000000 50000000000000 0 1701b02102004 c000280051115000 10e000000000000 0
B: MSC=10
B: SW=a

I: Bus=0019 Vendor=0000 Product=0006 Version=0000
N: Name="Video Bus"
P: Phys=LNXVIDEO/video/input0
S: Sysfs=/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input7
U: Uniq=
H: Handlers=kbd event5
B: PROP=0
B: EV=3
B: KEY=3e000b00000000 0 0 0

I: Bus=0003 Vendor=04f2 Product=b6be Version=4118
N: Name="Integrated Camera: Integrated C"
P: Phys=usb-0000:00:14.0-8/button
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb3/3-8/3-8:1.0/input/input9
U: Uniq=
H: Handlers=kbd event7
B: PROP=0
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0003 Vendor=04f2 Product=b6be Version=4118
N: Name="Integrated Camera: Integrated I"
P: Phys=usb-0000:00:14.0-8/button
S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb3/3-8/3-8:1.2/input/input10
U: Uniq=
H: Handlers=kbd event8
B: PROP=0
B: EV=3
B: KEY=100000 0 0 0

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="sof-hda-dsp Mic"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1f.3/skl_hda_dsp_generic/sound/card0/input11
U: Uniq=
H: Handlers=event9
B: PROP=0
B: EV=21
B: SW=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="sof-hda-dsp Headphone"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1f.3/skl_hda_dsp_generic/sound/card0/input12
U: Uniq=
H: Handlers=event10
B: PROP=0
B: EV=21
B: SW=4

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="sof-hda-dsp HDMI/DP,pcm=3"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1f.3/skl_hda_dsp_generic/sound/card0/input13
U: Uniq=
H: Handlers=event11
B: PROP=0
B: EV=21
B: SW=140

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="sof-hda-dsp HDMI/DP,pcm=4"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1f.3/skl_hda_dsp_generic/sound/card0/input14
U: Uniq=
H: Handlers=event12
B: PROP=0
B: EV=21
B: SW=140

I: Bus=0000 Vendor=0000 Product=0000 Version=0000
N: Name="sof-hda-dsp HDMI/DP,pcm=5"
P: Phys=ALSA
S: Sysfs=/devices/pci0000:00/0000:00:1f.3/skl_hda_dsp_generic/sound/card0/input15
U: Uniq=
H: Handlers=event13
B: PROP=0
B: EV=21
B: SW=140

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: linux-image-5.15.0-46-generic 5.15.0-46.49~20.04.1
ProcVersionSignature: Ubuntu 5.15.0-46.49~20.04.1-generic 5.15.39
Uname: Linux 5.15.0-46-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.24
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Mon Sep 26 14:53:54 2022
InstallationDate: Installed on 2022-06-28 (89 days ago)
InstallationMedia: Ubuntu 20.04.4 LTS "Focal Fossa" - Release amd64 (20220223)
SourcePackage: linux-signed-hwe-5.15
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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