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I've been following a lot of issues here that relates to this one - so it might be a possible duplicate, however since I didn't see it for 20.04 version, I think it's a new one. The issue is:

  1. I have installed (via USB that contained a downloaded version from Official website) the Ubuntu 20.04 new OS. - Please note this is a fresh installation.
  2. After rebooting, the keyboard and mousepad are just not working.
  3. They are working if I am getting to tty (for example) / BIOS, however not in the login page / in the OS.

I have followed each and any guide here about installing / updating xserver-xorg-input-all again and again, however this isn't seems to solve the issue.

Hardware:

Architecture: x86_64 product: Inspiron 7348 (0675) product: 067RT2 product: Intel(R) Core(TM) i7-5500U CPU @ 2.40GHz product: HMT41GS6BFR8A-PB product: Broadwell-U Host Bridge -OPI product: HD Graphics 5500 product: Broadwell-U Audio Controller product: Broadwell-U Processor Thermal Subsystem product: Wildcat Point-LP USB xHCI Controller product: xHCI Host Controller product: USB Receiver product: ST_SENSOR_HUB product: Integrated_Webcam_HD product: Touchscreen product: xHCI Host Controller product: Wildcat Point-LP MEI Controller #1 product: Wildcat Point-LP High Definition Audio Controller product: Wildcat Point-LP PCI Express Root Port #3 product: Wireless 7265 product: Wildcat Point-LP USB EHCI Controller product: EHCI Host Controller product: Wildcat Point-LP LPC Controller product: Wildcat Point-LP SATA Controller [AHCI Mode] product: LITEONIT LCS-256 product: Wildcat Point-LP SMBus Controller product: Wildcat Point-LP Thermal Management Controller product: PnP device PNP0c02 product: PnP device PNP0b00 product: PnP device INT3f0d product: PnP device PNP0c02 product: PnP device PNP0303 product: PnP device DLL065a product: PnP device PNP0c02 product: PnP device PNP0c02 product: DELL 0WF28498 product: OEM Define 5

My questions:

  1. Did anyone else suffer from this problem? Where you reboot - install the xserver using an external (for example) keyboard and mouse - then it works. Then after another reboot - it does not work? Specifically after upgrading to 20.04!

  2. How can I solve it? Please assist as it is a critical issue!

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2 Answers

The problem is Ubuntu thinks your PC is a tablet and diables the keyboard. The fix below works if the following command gives you any number that is not 31 or 32.

cat /sys/class/dmi/id/chassis_type

How to fix this: (from )

There is a bug in recent kernels that disables some laptop keyboards. Mainly Acer and HP so far. Can usually go to recovery and boot from kernel 5.4.0-42 or use an external keyboard.

Blacklisting the intel_vbtn kernel module is a workaround for this, as seen in Why my laptop's keyboard screwed up since kernel 5.4.0-47 till 5.8.0-20

To implement this, you can either create a new file in /etc/modprobe.d with the suffix .conf or use the main blacklist.conf file. The former may be preferable, since you can then just delete the file when it is no longer required (i.e. when the bug is fixed):

sudoedit /etc/modprobe.d/blacklist-intel_vbtn.conf

Add a line to the file, optionally with a comment explaining why you are doing this

# bug in module breaks keyboard, so don't load it
blacklist intel_vbtn

Save the file, exit and reboot.

5

Check drivers for your computer on your official computer brand driver page; normally you can select your operating system, and you will find the most common drivers for install, for mousepad for sure.

For example, in case of my hp:

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