Thank you for you quick answer Demm 🙂

Did the touchpad also not work in Live mode?

No touchpad didn't work too in KaOS live mode :/

journalctl, i got an ACPI error but i do not know if it is related or not.

-- Logs begin at Sun 2020-02-09 17:58:03 CET, end at Sun 2020-02-09 21:12:24 CET. --
févr. 09 21:08:00 Asteria kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.GPP0.SWUS], AE_NOT_FOUND (20191018/dswload2-159)
févr. 09 21:08:00 Asteria kernel: ACPI Error: AE_NOT_FOUND, During name lookup/catalog (20191018/psobject-220)
févr. 09 21:08:00 Asteria kernel: ACPI BIOS Error (bug): Could not resolve symbol [\_SB.PCI0.GPP0.SWUS.SWDS], AE_NOT_FOUND (20191018/dswload2-159)
févr. 09 21:08:00 Asteria kernel: ACPI Error: AE_NOT_FOUND, During name lookup/catalog (20191018/psobject-220)
févr. 09 21:08:00 Asteria kernel: pci 0000:00:00.2: AMD-Vi: Unable to read/write to IOMMU perf counter.
févr. 09 21:08:01 Asteria kernel: tpm_crb MSFT0101:00: [Firmware Bug]: ACPI region does not cover the entire command/response buffer. [mem 0xbd2e9000-0xbd2e9fff flags 0x200] vs bd2e9000 4000
févr. 09 21:08:01 Asteria kernel: tpm_crb MSFT0101:00: [Firmware Bug]: ACPI region does not cover the entire command/response buffer. [mem 0xbd2ed000-0xbd2edfff flags 0x200] vs bd2ed000 4000
févr. 09 21:08:02 Asteria kernel: ACPI Error: Divide by zero (20191018/utmath-478)
févr. 09 21:08:02 Asteria kernel: ACPI Error: Aborting method \_SB.ATKD.WMNB due to previous error (AE_AML_DIVIDE_BY_ZERO) (20191018/psparse-529)
févr. 09 21:08:03 Asteria kernel: kvm: disabled by bios
févr. 09 21:08:03 Asteria kernel: kvm: disabled by bios
févr. 09 21:08:03 Asteria kernel: kvm: disabled by bios
févr. 09 21:08:03 Asteria kernel: kvm: disabled by bios
févr. 09 21:08:03 Asteria kernel: kvm: disabled by bios
févr. 09 21:08:03 Asteria kernel: kvm: disabled by bios
févr. 09 21:08:03 Asteria kernel: kvm: disabled by bios
févr. 09 21:08:03 Asteria kernel: kvm: disabled by bios
févr. 09 21:08:04 Asteria kernel: [drm:dm_helpers_parse_edid_caps [amdgpu]] *ERROR* Couldn't read SADs: -2
févr. 09 21:08:05 Asteria systemd-backlight[534]: Failed to get backlight or LED device 'backlight:acpi_video0': No such device
févr. 09 21:08:05 Asteria systemd[1]: Failed to start Load/Save Screen Backlight Brightness of backlight:acpi_video0.

Here is the Xorg log :
https://paste.ee/p/kEPgM

And the hwinfo --mouse info
There is only my usb mouse x)

38: USB 00.0: 10503 USB Mouse
[Created at usb.122]
Unique ID: CiZ2.VqQxadZ7ky5
Parent ID: uIhY.buxry1DL_88
SysFS ID: /devices/pci0000:00/0000:00:08.1/0000:05:00.3/usb3/3-3/3-3:1.0
SysFS BusID: 3-3:1.0
Hardware Class: mouse
Model: "Pixart Imaging Optical Mouse"
Hotplug: USB
Vendor: usb 0x093a "Pixart Imaging, Inc."
Device: usb 0x2521 "Optical Mouse"
Revision: "1.00"
Compatible to: int 0x0210 0x0045
Driver: "usbhid"
Driver Modules: "usbhid"
Device File: /dev/input/mice (/dev/input/mouse0)
Device Files: /dev/input/mice, /dev/input/mouse0, /dev/input/event9, /dev/input/by-path/pci-0000:05:00.3-usb-0:3:1.0-event-mouse, /dev/input/by-id/usb-093a_USB_OPTICAL_MOUSE-event-mouse, /dev/input/by-id/usb-093a_USB_OPTICAL_MOUSE-mouse, /dev/input/by-path/pci-0000:05:00.3-usb-0:3:1.0-mouse
Device Number: char 13:63 (char 13:32)
Speed: 1.5 Mbps
Module Alias: "usb:v093Ap2521d0100dc00dsc00dp00ic03isc01ip02in00"
Driver Info #0:
Buttons: 5
Wheels: 4
XFree86 Protocol: explorerps/2
GPM Protocol: exps2
Config Status: cfg=new, avail=yes, need=no, active=unknown
Attached to: #41 (Hub)

Contrary I hit the touchpad button to try to reactivate it...

So far no indication what the touchpad hardware might be, nor any errors/messages about it, looks like it is completely disabled. One more try to find the hardware:

sudo libinput list-devices

And pastebin the full dmesg output, this snippet is not about touchpad.

My touchpad is an Elantech 1200 i think. I forgot to mention it but i have a dual boot with windows 10 ^^"

There is absolute no sign of a touchpad, no errors, nothing. So make sure to boot in your Windows install and check if it is sill working there.

7 days later

Heya, similar issue here on a fresh install of latest KaOS iso on my Asus X505ZA Ryzen 5.
Also the touchpad didn't worked on live, but in no other distro I ever got a non working touchpad on a fresh install. It has something to do with the kernal version I guess but still as with the OP, neither do I see any sign of hardware getting recognized by the kernal.

It looks like generic problem, my laptop arrives with Ubuntu, touchpad works, after installing KaOS it's not even showing in lscpi nor xinput. Something definitely is missing, since i've not using it, it's not a problem to me, but at least i want to confirm that problem is real.

Okay so I did tried linux-next 5.5.x and the issue still persists.

Since no hardware I have available shows this issue, I have to rely on reports to try and debug. So far nothing useful has been shown, not even what hardware is effected, only the OP posted system specs (but no specifics of the touchpad). Are those effected on the same laptop, same touchpad? If it is the kernel, what kernel version did this start?

The issue might be hardware specific as I am using the same Elantech 1200 touchpad.
Just to let you know, the touchpad works real fine on 5.4.18-1-MANJARO (KDE), although it fails to work on live medium.

libinput on my manjaro system gives the following output

Device: ELAN1200:00 04F3:303E Touchpad
Kernel: /dev/input/event13
Group: 9
Seat: seat0, default
Size: 103x71mm
Capabilities: pointer gesture
Tap-to-click: disabled
Tap-and-drag: enabled
Tap drag lock: disabled
Left-handed: disabled
Nat.scrolling: disabled
Middle emulation: disabled
Calibration: n/a
Scroll methods: *two-finger edge
Click methods: *button-areas clickfinger
Disable-w-typing: enabled
Accel profiles: none
Rotation: n/a

  • demm replied to this.

    theventus my manjaro system

    Which kernel? All I can find is that the elantech 1200 has kernel related issues, so would be good to know which kernel was working.

    And for all of you,dmesg | grep elan, does it show any?

    Have any of you tried reloading the needed module, added some restrictions? Try the following and see if the touchpad is at least found:

    sudo rmmod psmouse
    sudo modprobe psmouse proto=exps

    Two finger scrolling won't be supported then.

    Further research for Elantech 1200 showed this started after linux 5.2.8, so the above comments about other distros working make sense, since they are on older kernels at that time.
    Seems for some, they could get the touchpad to the state of 5.2.8 and before by adding elantech_smbus=0 synaptics_intertouch=0 to the kernel boot line (or adding that to the bootloader kernel line).

    I am using a manjaro system with 5.4.18-1-MANJARO and I have tried the latest available kernel there i.e. 5.5.2-1 works fine as well.

    Sorry demm but I have switched to manjaro back so I won't be able to check if your suggestions work. But it is highly appreciated mate! This project is awesome, in near future I'm going to try this again on my other machines.

    Idk how this might be useful but I'm quoting the dmesg output from my manjaro kde below as it seems it indeed has some issues with manjaro too but they somehow made it work it seems.

    sudo dmesg | grep ELAN
    [ 7.985996] i2c_hid i2c-ELAN1200:00: i2c-ELAN1200:00 supply vdd not found, using dummy regulator
    [ 7.986014] i2c_hid i2c-ELAN1200:00: i2c-ELAN1200:00 supply vddl not found, using dummy regulator
    [ 10.733538] input: ELAN1200:00 04F3:303E Mouse as /devices/platform/AMDI0010:01/i2c-0/i2c-ELAN1200:00/0018:04F3:303E.0001/input/input13
    [ 10.733674] input: ELAN1200:00 04F3:303E Touchpad as /devices/platform/AMDI0010:01/i2c-0/i2c-ELAN1200:00/0018:04F3:303E.0001/input/input14
    [ 10.733770] hid-generic 0018:04F3:303E.0001: input,hidraw0: I2C HID v1.00 Mouse [ELAN1200:00 04F3:303E] on i2c-ELAN1200:00
    [ 10.795416] input: ELAN1200:00 04F3:303E Mouse as /devices/platform/AMDI0010:01/i2c-0/i2c-ELAN1200:00/0018:04F3:303E.0001/input/input15
    [ 10.795517] input: ELAN1200:00 04F3:303E Touchpad as /devices/platform/AMDI0010:01/i2c-0/i2c-ELAN1200:00/0018:04F3:303E.0001/input/input16
    [ 10.795583] hid-multitouch 0018:04F3:303E.0001: input,hidraw0: I2C HID v1.00 Mouse [ELAN1200:00 04F3:303E] on i2c-ELAN1200:00

    5 days later

    Hi guys
    dmesg | grep elan shows nothing x)
    reloading psmouse module didn't work ...
    elantech_smbus=0 synaptics_intertouch=0 same with these :/

    My keyboard backlight doesn't work as well (in kaos only), i think it's related i forgot to mention it too 😅

    3 months later

    Hello, I just installed May 2020 release, and it looks like the problem persists, I think I can live with it, but if I can test something for you, let me know

    • demm replied to this.

      joseangel-leyva I can test something for you, let me know

      See my previous post (#14) in this thread for needed info and trial to see if adding to the kernel line helps.

      I tried but it did not work, reading on some other places they recommend i2c-tools package, but it's not in the repo list

      Please post the logs as asked for, so far no-where near enough debug info to try and fix. Links for the i2c-tools recommendations? I do not see any in the source for that that addresses elantech. "Nothing" or "did not work" is not a helpful response, full dmesg is needed, system info, error logs and so on.
      https://kaosx.us/docs

      Has any of you tried to get the latest firmware for your system with fwupd?
      https://kaosx.us/packages/view.php?repo=main&name=fwupd-1.4.2-1

      hello all,

      I have the same issue - my laptop is Lenovo Ideapad 330 - My touchpad is not working - I confirm it works in my MXLinux 19 patio ( kernel 5.4.0-3-amd64 )

      I am using KaOS-2020.05-x86_64 and various sysinfo as below

       jeevan  ~   journalctl -b -p err
      -- Logs begin at Mon 2020-06-08 19:21:29 IST, end at Tue 2020-06-09 17:26:48 IST. --
      Jun 09 17:21:27 jeevan-81d2 kernel: AMD-Vi: [Firmware Bug]: : IOAPIC[4] not in IVRS table
      Jun 09 17:21:27 jeevan-81d2 kernel: AMD-Vi: [Firmware Bug]: : IOAPIC[5] not in IVRS table
      Jun 09 17:21:27 jeevan-81d2 kernel: AMD-Vi: [Firmware Bug]: : No southbridge IOAPIC found
      Jun 09 17:21:27 jeevan-81d2 kernel: AMD-Vi: Disabling interrupt remapping
      Jun 09 17:21:27 jeevan-81d2 kernel: pci 0000:00:00.2: AMD-Vi: Unable to read/write to IOMMU perf counter.
      Jun 09 17:21:30 jeevan-81d2 kernel: tpm_crb MSFT0101:00: can't request region for resource [mem 0xbf7a2000-0xbf7a5fff]
      Jun 09 17:21:31 jeevan-81d2 kernel: kvm: disabled by bios
      Jun 09 17:21:31 jeevan-81d2 kernel: kvm: disabled by bios
      Jun 09 17:21:31 jeevan-81d2 kernel: kvm: disabled by bios
      Jun 09 17:21:31 jeevan-81d2 kernel: kvm: disabled by bios
      Jun 09 17:21:31 jeevan-81d2 kernel: kvm: disabled by bios
      Jun 09 17:21:31 jeevan-81d2 kernel: kvm: disabled by bios
      Jun 09 17:21:31 jeevan-81d2 kernel: kvm: disabled by bios
      Jun 09 17:21:31 jeevan-81d2 kernel: kvm: disabled by bios
      Jun 09 17:21:33 jeevan-81d2 kernel: xhci_hcd 0000:03:00.4: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0000 address=0x222b0c8c0 flags=0x0050]
      Jun 09 17:21:33 jeevan-81d2 kernel: xhci_hcd 0000:03:00.4: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0000 address=0x222ae6040 flags=0x0070]
      Jun 09 17:21:33 jeevan-81d2 kernel: xhci_hcd 0000:03:00.4: AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x0000 address=0x222b17040 flags=0x0070]
      Jun 09 17:21:33 jeevan-81d2 systemd-backlight[394]: Failed to get backlight or LED device 'backlight:acpi_video1': No such device
      Jun 09 17:21:33 jeevan-81d2 systemd[1]: Failed to start Load/Save Screen Backlight Brightness of backlight:acpi_video1.
      Jun 09 17:21:35 jeevan-81d2 kernel: Bluetooth: hci0: command 0x2029 tx timeout
      Jun 09 17:21:37 jeevan-81d2 kernel: Bluetooth: hci0: command 0x202f tx timeout
      Jun 09 17:21:39 jeevan-81d2 kernel: Bluetooth: hci0: command 0x2023 tx timeout
      Jun 09 17:21:41 jeevan-81d2 kernel: Bluetooth: hci0: command 0x1004 tx timeout
      Jun 09 17:21:48 jeevan-81d2 kernel: xhci_hcd 0000:03:00.4: xHCI host controller not responding, assume dead
      Jun 09 17:21:48 jeevan-81d2 kernel: xhci_hcd 0000:03:00.4: HC died; cleaning up
      Jun 09 17:22:07 jeevan-81d2 kwin_x11[718]: kwin_xkbcommon: XKB: couldn't find a Compose file for locale "en_IN"
      Jun 09 17:22:12 jeevan-81d2 pulseaudio[781]: [pulseaudio] bluez5-util.c: GetManagedObjects() failed: org.freedesktop.systemd1.NoSuchUnit: Unit dbus-org.bluez.service >
      Jun 09 17:23:06 jeevan-81d2 ntpd[1542]: bind(21) AF_INET6 2409:4073:1e:b30e:b600:220d:8270:80ef#123 flags 0x11 failed: Cannot assign requested address
      Jun 09 17:23:06 jeevan-81d2 ntpd[1542]: unable to create socket on enp3s0f3u3 (5) for 2409:4073:1e:b30e:b600:220d:8270:80ef#123
      Jun 09 17:23:07 jeevan-81d2 ntpd[1542]: bind(25) AF_INET6 2409:4073:1e:b30e:b600:220d:8270:80ef#123 flags 0x11 failed: Cannot assign requested address
      Jun 09 17:23:07 jeevan-81d2 ntpd[1542]: unable to create socket on enp3s0f3u3 (7) for 2409:4073:1e:b30e:b600:220d:8270:80ef#123
      
      
      
      [root@jeevan-81d2 jeevan]# xinput 
      ⎡ Virtual core pointer                          id=2    [master pointer  (3)]
      ⎜   ↳ Virtual core XTEST pointer                id=4    [slave  pointer  (2)]
      ⎜   ↳ SIGMACHIP Usb Mouse                       id=10   [slave  pointer  (2)]
      ⎣ Virtual core keyboard                         id=3    [master keyboard (2)]
          ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
          ↳ Power Button                              id=6    [slave  keyboard (3)]
          ↳ Video Bus                                 id=7    [slave  keyboard (3)]
          ↳ Video Bus                                 id=8    [slave  keyboard (3)]
          ↳ Power Button                              id=9    [slave  keyboard (3)]
          ↳ Ideapad extra buttons                     id=12   [slave  keyboard (3)]
          ↳ AT Translated Set 2 keyboard              id=13   [slave  keyboard (3)]
      [root@jeevan-81d2 jeevan]# 
      
      
      
      
      [root@jeevan-81d2 jeevan]# sudo rmmod psmouse
      rmmod: ERROR: Module psmouse is not currently loaded
      
      
      [root@jeevan-81d2 jeevan]# libinput list-devices
      Device:           Power Button
      Kernel:           /dev/input/event4
      Group:            1
      Seat:             seat0, default
      Capabilities:     keyboard 
      Tap-to-click:     n/a
      Tap-and-drag:     n/a
      Tap drag lock:    n/a
      Left-handed:      n/a
      Nat.scrolling:    n/a
      Middle emulation: n/a
      Calibration:      n/a
      Scroll methods:   none
      Click methods:    none
      Disable-w-typing: n/a
      Accel profiles:   n/a
      Rotation:         n/a
      
      Device:           Video Bus
      Kernel:           /dev/input/event6
      Group:            2
      Seat:             seat0, default
      Capabilities:     keyboard 
      Tap-to-click:     n/a
      Tap-and-drag:     n/a
      Tap drag lock:    n/a
      Left-handed:      n/a
      Nat.scrolling:    n/a
      Middle emulation: n/a
      Calibration:      n/a
      Scroll methods:   none
      Click methods:    none
      Disable-w-typing: n/a
      Accel profiles:   n/a
      Rotation:         n/a
      
      Device:           Video Bus
      Kernel:           /dev/input/event7
      Group:            2
      Seat:             seat0, default
      Capabilities:     keyboard 
      Tap-to-click:     n/a
      Tap-and-drag:     n/a
      Tap drag lock:    n/a
      Left-handed:      n/a
      Nat.scrolling:    n/a
      Middle emulation: n/a
      Calibration:      n/a
      Scroll methods:   none
      Click methods:    none
      Disable-w-typing: n/a
      Accel profiles:   n/a
      Rotation:         n/a
      
      Device:           Power Button
      Kernel:           /dev/input/event3
      Group:            3
      Seat:             seat0, default
      Capabilities:     keyboard 
      Tap-to-click:     n/a
      Tap-and-drag:     n/a
      Tap drag lock:    n/a
      Left-handed:      n/a
      Nat.scrolling:    n/a
      Middle emulation: n/a
      Calibration:      n/a
      Scroll methods:   none
      Click methods:    none
      Disable-w-typing: n/a
      Accel profiles:   n/a
      Rotation:         n/a
      
      Device:           Lid Switch
      Kernel:           /dev/input/event2
      Group:            4
      Seat:             seat0, default
      Capabilities:     switch
      Tap-to-click:     n/a
      Tap-and-drag:     n/a
      Tap drag lock:    n/a
      Left-handed:      n/a
      Nat.scrolling:    n/a
      Middle emulation: n/a
      Calibration:      n/a
      Scroll methods:   none
      Click methods:    none
      Disable-w-typing: n/a
      Accel profiles:   n/a
      Rotation:         n/a
      
      Device:           HD-Audio Generic HDMI/DP,pcm=3
      Kernel:           /dev/input/event9
      Group:            5
      Seat:             seat0, default
      Capabilities:     
      Tap-to-click:     n/a
      Tap-and-drag:     n/a
      Tap drag lock:    n/a
      Left-handed:      n/a
      Nat.scrolling:    n/a
      Middle emulation: n/a
      Calibration:      n/a
      Scroll methods:   none
      Click methods:    none
      Disable-w-typing: n/a
      Accel profiles:   n/a
      Rotation:         n/a
      
      Device:           SIGMACHIP Usb Mouse
      Kernel:           /dev/input/event1
      Group:            6
      Seat:             seat0, default
      Capabilities:     pointer 
      Tap-to-click:     n/a
      Tap-and-drag:     n/a
      Tap drag lock:    n/a
      Left-handed:      disabled
      Nat.scrolling:    disabled
      Middle emulation: disabled
      Calibration:      n/a
      Scroll methods:   button
      Click methods:    none
      Disable-w-typing: n/a
      Accel profiles:   flat *adaptive
      Rotation:         n/a
      
      Device:           HD-Audio Generic Mic
      Kernel:           /dev/input/event10
      Group:            5
      Seat:             seat0, default
      Capabilities:     
      Tap-to-click:     n/a
      Tap-and-drag:     n/a
      Tap drag lock:    n/a
      Left-handed:      n/a
      Nat.scrolling:    n/a
      Middle emulation: n/a
      Calibration:      n/a
      Scroll methods:   none
      Click methods:    none
      Disable-w-typing: n/a
      Accel profiles:   n/a
      Rotation:         n/a
      
      Device:           HD-Audio Generic Headphone
      Kernel:           /dev/input/event11
      Group:            5
      Seat:             seat0, default
      Capabilities:     
      Tap-to-click:     n/a
      Tap-and-drag:     n/a
      Tap drag lock:    n/a
      Left-handed:      n/a
      Nat.scrolling:    n/a
      Middle emulation: n/a
      Calibration:      n/a
      Scroll methods:   none
      Click methods:    none
      Disable-w-typing: n/a
      Accel profiles:   n/a
      Rotation:         n/a
      
      Device:           Ideapad extra buttons
      Kernel:           /dev/input/event8
      Group:            7
      Seat:             seat0, default
      Capabilities:     keyboard 
      Tap-to-click:     n/a
      Tap-and-drag:     n/a
      Tap drag lock:    n/a
      Left-handed:      n/a
      Nat.scrolling:    n/a
      Middle emulation: n/a
      Calibration:      n/a
      Scroll methods:   none
      Click methods:    none
      Disable-w-typing: n/a
      Accel profiles:   n/a
      Rotation:         n/a
      
      Device:           AT Translated Set 2 keyboard
      Kernel:           /dev/input/event0
      Group:            8
      Seat:             seat0, default
      Capabilities:     keyboard 
      Tap-to-click:     n/a
      Tap-and-drag:     n/a
      Tap drag lock:    n/a
      Left-handed:      n/a
      Nat.scrolling:    n/a
      Middle emulation: n/a
      Calibration:      n/a
      Scroll methods:   none
      Click methods:    none
      Disable-w-typing: n/a
      Accel profiles:   n/a
      Rotation:         n/a
      
      
      
      
                           ..             jeevan@jeevan-81d2
        .....         ..OSSAAAAAAA..      OS: KaOS rolling
       .KKKKSS.     .SSAAAAAAAAAAA.       Kernel: x86_64 Linux 5.6.8-1
      .KKKKKSO.    .SAAAAAAAAAA...        Uptime: 8m
      KKKKKKS.   .OAAAAAAAA.              Packages: 916
      KKKKKKS.  .OAAAAAA.                 Shell: bash 5.0.17
      KKKKKKS. .SSAA..                    Resolution: 1366x768
      .KKKKKS..OAAAAAAAAAAAA........      DE: KDE 5.70.0
       DKKKKO.=AA=========A===AASSSO..    WM: KWin
        AKKKS.==========AASSSSAAAAAASS.   Disk: 78G / 919G (9%)
        .=KKO..========ASS.....SSSSASSSS. CPU: AMD Ryzen 5 2500U with Radeon Vega Mobile Gfx @ 8x 2GHz
          .KK.       .ASS..O.. =SSSSAOSS: GPU: AMD RAVEN (DRM 3.36.0, 5.6.8-1, LLVM 9.0.1)
           .OK.      .ASSSSSSSO...=A.SSA. RAM: 1503MiB / 7507MiB
             .K      ..SSSASSSS.. ..SSA. 
                       .SSS.AAKAKSSKA.   
                          .SSS....S.. 
                          
                          
                          
                      
                      
                      
      [root@jeevan-81d2 jeevan]# grep "input device" /var/log/Xorg.0.log
      [    29.216] (II) The server relies on udev to provide the list of input devices.
      [    32.819] (II) config/udev: Adding input device Power Button (/dev/input/event4)
      [    32.932] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 6)
      [    32.935] (II) config/udev: Adding input device Video Bus (/dev/input/event6)
      [    32.956] (II) XINPUT: Adding extended input device "Video Bus" (type: KEYBOARD, id 7)
      [    32.959] (II) config/udev: Adding input device Video Bus (/dev/input/event7)
      [    32.980] (II) XINPUT: Adding extended input device "Video Bus" (type: KEYBOARD, id 8)
      [    32.983] (II) config/udev: Adding input device Power Button (/dev/input/event3)
      [    32.996] (II) XINPUT: Adding extended input device "Power Button" (type: KEYBOARD, id 9)
      [    32.999] (II) config/udev: Adding input device Lid Switch (/dev/input/event2)
      [    33.000] (II) config/udev: Adding input device HD-Audio Generic HDMI/DP,pcm=3 (/dev/input/event9)
      [    33.001] (II) config/udev: Adding input device SIGMACHIP Usb Mouse (/dev/input/event1)
      [    33.076] (II) XINPUT: Adding extended input device "SIGMACHIP Usb Mouse" (type: MOUSE, id 10)
      [    33.133] (II) config/udev: Adding input device SIGMACHIP Usb Mouse (/dev/input/mouse0)
      [    33.135] (II) config/udev: Adding input device EasyCamera: EasyCamera (/dev/input/event12)
      [    33.155] (II) XINPUT: Adding extended input device "EasyCamera: EasyCamera" (type: KEYBOARD, id 11)
      [    33.159] (II) config/udev: Adding input device HD-Audio Generic Mic (/dev/input/event10)
      [    33.160] (II) config/udev: Adding input device HD-Audio Generic Headphone (/dev/input/event11)
      [    33.161] (II) config/udev: Adding input device Ideapad extra buttons (/dev/input/event8)
      [    33.181] (II) XINPUT: Adding extended input device "Ideapad extra buttons" (type: KEYBOARD, id 12)
      [    33.184] (II) config/udev: Adding input device AT Translated Set 2 keyboard (/dev/input/event0)
      [    33.197] (II) XINPUT: Adding extended input device "AT Translated Set 2 keyboard" (type: KEYBOARD, id 13)
      [    33.201] (II) config/udev: Adding input device PC Speaker (/dev/input/event5)
      
      
      
      [root@jeevan-81d2 jeevan]# cat /proc/bus/input/devices
      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/input0
      U: Uniq=
      H: Handlers=sysrq kbd leds event0 
      B: PROP=0
      B: EV=120013
      B: KEY=402000000 3803078f800d001 feffffdfffefffff fffffffffffffffe
      B: MSC=10
      B: LED=7
      
      I: Bus=0003 Vendor=1c4f Product=0034 Version=0110
      N: Name="SIGMACHIP Usb Mouse"
      P: Phys=usb-0000:03:00.3-4/input0
      S: Sysfs=/devices/pci0000:00/0000:00:08.1/0000:03:00.3/usb1/1-4/1-4:1.0/0003:1C4F:0034.0001/input/input1
      U: Uniq=
      H: Handlers=event1 mouse0 
      B: PROP=0
      B: EV=17
      B: KEY=70000 0 0 0 0
      B: REL=903
      B: MSC=10
      
      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=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/input3
      U: Uniq=
      H: Handlers=kbd event3 
      B: PROP=0
      B: EV=3
      B: KEY=10000000000000 0
      
      I: Bus=0019 Vendor=0000 Product=0001 Version=0000
      N: Name="Power Button"
      P: Phys=LNXPWRBN/button/input0
      S: Sysfs=/devices/LNXSYSTM:00/LNXPWRBN:00/input/input4
      U: Uniq=
      H: Handlers=kbd event4 
      B: PROP=0
      B: EV=3
      B: KEY=10000000000000 0
      
      I: Bus=0010 Vendor=001f Product=0001 Version=0100
      N: Name="PC Speaker"
      P: Phys=isa0061/input0
      S: Sysfs=/devices/platform/pcspkr/input/input5
      U: Uniq=
      H: Handlers=kbd event5 
      B: PROP=0
      B: EV=40001
      B: SND=6
      
      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/device:03/LNXVIDEO:01/input/input6
      U: Uniq=
      H: Handlers=kbd event6 
      B: PROP=0
      B: EV=3
      B: KEY=3e000b00000000 0 0 0
      
      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/device:0b/LNXVIDEO:02/input/input7
      U: Uniq=
      H: Handlers=kbd event7 
      B: PROP=0
      B: EV=3
      B: KEY=3e000b00000000 0 0 0
      
      I: Bus=0019 Vendor=0000 Product=0000 Version=0000
      N: Name="Ideapad extra buttons"
      P: Phys=ideapad/input0
      S: Sysfs=/devices/pci0000:00/0000:00:14.3/PNP0C09:00/VPC2004:00/input/input8
      U: Uniq=
      H: Handlers=kbd rfkill event8 
      B: PROP=0
      B: EV=13
      B: KEY=81000800100c03 4400000000300000 0 2
      B: MSC=10
      
      I: Bus=0000 Vendor=0000 Product=0000 Version=0000
      N: Name="HD-Audio Generic HDMI/DP,pcm=3"
      P: Phys=ALSA
      S: Sysfs=/devices/pci0000:00/0000:00:08.1/0000:03:00.1/sound/card0/input9
      U: Uniq=
      H: Handlers=event9 
      B: PROP=0
      B: EV=21
      B: SW=140
      
      I: Bus=0000 Vendor=0000 Product=0000 Version=0000
      N: Name="HD-Audio Generic Mic"
      P: Phys=ALSA
      S: Sysfs=/devices/pci0000:00/0000:00:08.1/0000:03:00.6/sound/card1/input10
      U: Uniq=
      H: Handlers=event10 
      B: PROP=0
      B: EV=21
      B: SW=10
      
      I: Bus=0000 Vendor=0000 Product=0000 Version=0000
      N: Name="HD-Audio Generic Headphone"
      P: Phys=ALSA
      S: Sysfs=/devices/pci0000:00/0000:00:08.1/0000:03:00.6/sound/card1/input11
      U: Uniq=
      H: Handlers=event11 
      B: PROP=0
      B: EV=21
      B: SW=4
      
      
      
      [root@jeevan-81d2 jeevan]# dmesg | grep i2c
      [root@jeevan-81d2 jeevan]# 
      [root@jeevan-81d2 jeevan]# uname -sr
      Linux 5.6.8-1