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How can I fix this? The solutions suggested in 1 and 2 did not work for me.

The only device that looks like it could be my trackpad is this one cat /proc/bus/input/devices:

I: Bus=0019 Vendor=0000 Product=0000 Version=0000
N: Name="Ideapad extra buttons"
P: Phys=ideapad/input0
S: Sysfs=/devices/pci0000:00/0000:00:1f.0/PNP0C09:00/VPC2004:00/input/input5
U: Uniq=
H: Handlers=rfkill kbd event5 
B: PROP=0
B: EV=13
B: KEY=81000800100c03 4400000000300000 0 2
B: MSC=10

OS: Ubuntu 20.04 LTS

Touchpad worked under Windwos.

  • It means that the touchpad is not supported by Linux yet. – Pilot6 Jun 10 at 17:27
  • fuck. What can I do? Is there anything? – User12547645 Jun 10 at 18:12
  • perhaps you try the answer i provided for your second link - even though it is a differnet model you might be lucky and they used the same touchpad ;) – db429 Jun 18 at 23:41
  • found something: maybe that works ;) forums.lenovo.com/t5/Ubuntu/… – db429 Jun 19 at 1:04
  • Did not work for bios DJCN16WW and kernel 5.4.0-37-generic – User12547645 Jun 19 at 9:31
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This is a bug in the laptops BIOS. You can fix the acpi tables by following comment 66 and 96 in this ubuntu bug:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1861610/

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  • 2
    Edit and include the relevant parts of the link in your answer – Greenonline Aug 22 at 2:49
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We were also facing the same problem with Lenovo ThinkBool-14IIL, We just update the kernel as per the below link and the touchpad start working for us with the latest bios version.

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1853277

Try your luck with this. and if it works, do not forget to say thanks to Kai.

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