Ubuntu 20.04: keyboard and mousepad not working after installation

Question

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:

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.
After rebooting, the keyboard and mousepad are just not working.
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:

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

score 1 · Accepted Answer · answered Nov 07 '20 at 12:23

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 https://askubuntu.com/a/1282269/558457)

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.

David DRM · Answer 2 · 2020-05-07T07:32:28.957

0

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: https://support.hp.com/gb-en/drivers/selfservice/hp-elitebook-840-g1-notebook-pc/5405360

edited May 07 '20 at 07:32

answered May 02 '20 at 12:01

David DRM

1

Hey, do you know how can I get drivers for ubuntu (e.g. .deb) and not .exe? Thank you. – Daniel H May 02 '20 at 12:40
Unfortunately, the link is in spanish. Please do only use english links. – zx485 May 04 '20 at 19:20
I upload with english one, but anyway, It was an example, I dont think Daniel has exactly the same computer than me :)....For the drivers Daniel, you have to look for your own drivers. If you have a laptop, go to the official vendor web, and for should they provide the proper basic drivers for unix distributions. – David DRM May 07 '20 at 07:34
David, thank you for this, but it might be irrelevant for me, as indeed this 20.04 has a bug in the keyboard. See comment above. – Daniel H May 09 '20 at 06:51

Ubuntu 20.04: keyboard and mousepad not working after installation

2 Answers2