English - Keyboard malfunctioning

I use Lubuntu. Few keys of my keyboard stopped suddenly working. I have tried rebooting , reinstalling and nothing helped. Once I was able to to fix the problem with resetting the keyboard shortcuts. However , after the lid off hibernate\sleep. the problem came back. It never happened before Playing around with the Keyboard Tweaks and Keyboard Shortcuts Settings.

IT AFFECTS BIOS AND LEGACY AND GRUB TOO. WHEN I HAVE FIXED THAT WITH RESETTING THE KEYBOARD SHORTCUTS IT HAS FIXED BIOS AND LEGACY AND GRUB TOO.

I HAVE TRIED UPGRADING ALL OF MY DRIVERS.

Funny and Strange things that happen:

*) Another thing that occurs is when I press “number 2 key” or “number 1 key” they don’t work . but When I press escape+num 2+num 1 it prints out a special char. “<”

xev:

KeyPress event, serial 48, synthetic NO, window 0x5200001,
    root 0x2e9, subw 0x0, time 14467569, (539,-373), root:(1345,215),
    state 0x10, keycode 94 (keysym 0x3c, less), same_screen YES,
    XLookupString gives 1 bytes: (3c) "<"
    XmbLookupString gives 1 bytes: (3c) "<"
    XFilterEvent returns: False

KeyRelease event, serial 48, synthetic NO, window 0x5200001,
    root 0x2e9, subw 0x0, time 14467699, (539,-373), root:(1345,215),
    state 0x10, keycode 94 (keysym 0x3c, less), same_screen YES,
    XLookupString gives 1 bytes: (3c) "<"
    XFilterEvent returns: False

*) Funny thing is that when keyboard was working good. the caps lock key light was not going on when the Caps Lock was on. Now when I use Onboard and press Caps lock the light goes on but Caps Lock doesn’t work as a key.

Can you please help me to solve the problem?

Solutions that I have tried:

*) I have tried Windows Troubleshooter. Found none. *) I have tried updating and Uninstall+Reinstalling the PS2 Keyboard Driver. Nothing has changed.

*) I have tried contacting Chickony or Dell, None was succesful. Chickony support is unreachable . Dell community and support depend on Warranty and they don’t really care.

*) I have updated the BIOS. non has changed.

*) I have read about linux kernel and its modules. I have tried modifying some changes and changing to HK locale or others. Installing Chinese support programs. and other input control programs. None helped.

*) I have of course removed and reconnected keyboard from connector. Nothing has changed.

*) I have opened 2 keys individually to see if maybe some dust or other cause. Well there was a really small amount of dust but removing+cleaning didn’t help.

*) I have tried different Operation Systems . No results.

The only solution that once had worked is resetting the Keyboard Shortcuts via PureOS settings it worked like magic until suspend. Nowadays it is not helping.

*) I have tried reinstalling PureOs. none is changed.

*) I have tried removing and reinstalling CMOS battery. It has fixed the bipping on startup. not the keyboard…

*) I am trying to reset the VRAM but I have no Idea how to do that.

*) I have tried battery removing and pressing sleep button for 60secs or more.

The issue began using PureOS , everyone claims that it is an Hardware problem... I am sure it is not because of the facts that I have mentioned above...

USB keyboard is not a PS/2 keyboard and I am not able to find a shop that sells PS/2 Keyboard for Laptops,

There are few signs that this is not an Hardware issue,
Like that I was able to fix it with a reset and that combinations with keys that "don't work" do work.
Also the keyboard looks like new.
It never happened before.
There was a time that it got worse , few more keys stopped working without any explanation.
Since then nothing changed.
It is not an Hardware issue.

For a long time I have thought that I had an Hardware issue with my Internal Microphone and then I re-installed Windows 10 with updates and drivers and it worked quite well.

Hardware is not always the issue.

Thank you for the help...
Unfortunately I think there is a misunderstanding.
USB Keyboards do work good.
The ps/2 is the build in connector in my Motherboard.
I have also USB connections.

I have tested almost 10 different Linux distributions. Non worked.
Windows also didn't.
Only PureOs once worked after resetting some settings.

Why did the Keyboard (PS/2) had stopped working?

I have tried booting some other Operation Systems via USB. UEFI.
It didn't help.
I didn't try Linux mint yet.
I will try Now.

Quote from Gerbil

This is a long shot: PS/2 is most probably a serial interface. It might clash with the brltty driver that is normally installed to support blind users on a Braille device. I know that causes problems for flashing micro controller via serial interface. Is the brltty package installed and if yes, does the problem go away after un-installation?

Thank you for the help...
I don't know what is britty package and I don't know how to provide the answers.
I have never used a Brill support before..

brltty/noble,now 6.6-4ubuntu5 amd64 [residual-config]

Access software for a blind person using a braille display

brltty-espeak/noble 6.6-4ubuntu5 amd64

Access software for a blind person - espeak driver

brltty-flite/noble 6.6-4ubuntu5 amd64

Access software for a blind person - Flite speech driver

brltty-speechd/noble 6.6-4ubuntu5 amd64

Access software for a blind person - Speech Dispatcher driver

brltty-x11/noble 6.6-4ubuntu5 amd64

Access software for a blind person using a braille display - X11 drivers

cl-brlapi/noble,noble 6.6-4ubuntu5 all

Common Lisp bindings for BrlAPI

libbrlapi-dev/noble 6.6-4ubuntu5 amd64

Library for communication with BRLTTY - static libs and headers

libbrlapi-java/noble,noble 6.6-4ubuntu5 all

Java bindings for BrlAPI

libbrlapi-jni/noble 6.6-4ubuntu5 amd64

Java bindings for BrlAPI (native library)

libbrlapi0.8/noble,now 6.6-4ubuntu5 amd64 [installed,automatic]

braille display access via BRLTTY - shared library

python3-brlapi/noble,now 6.6-4ubuntu5 amd64 [installed,automatic]

Braille display access via BRLTTY - Python3 bindings

xbrlapi/noble,now 6.6-4ubuntu5 amd64 [installed,automatic]

Access software for a blind person using a braille display - xbrlapi

brltty was not installled on my LUbuntu.

I have Installed and Checked - no results.

I have Unisntalled and Checked - no results.

MX Linux is awsome but no results.

Quote from MMG

As @Dietmar91 has already mentioned: If nothing works, then the only possible solution is, that the keyboard is not working properly. Not because of some driver issue but because of a hardware issue.

I don't have any other idea.

I would love to agree.
It just doesn't make sense that groups of Keys stop working in a moment, including in BIOS and GRUB and other Operation Systems. After resetting some settings everything works fine, and after a sleep it is back again, and few days later larger amount of keys also stop working and since then no change...
Moreover combination of keys respond but the keys themselves don't.

If it was 1 or 2 keys? fine. but it just a feeling of a user.
I was feeling the same way with my Built-In Microphone.
Finally it is a fact that under Linux it doesn't work but under windows10 it does.

I have removed some "bad" keys and It looks like new.
I have checked the connectors and it was looking like it got out of the factory, Something is fishy.
Many people complain about this issue in Dell Laptops.
Even new users , new computers.

It has to be something systematic.
I am just no so expert and smart to find out what.

Quote from Gerbil

Yes sorry, it was only a wild guess.

Well, I still have Linux mint to try. This was my first Linux Distro. It was doing a lot of problem in waking up after Sleep\Lid off. Usually I had to kill the PC by holding power button. It was making a lot of loss to my ongoing jobs.
So I have decided to try different Distros, PureOS was a good one,So I have deleted Windows and Linux Mint, and then it happened. Keyboard problem. I have removed also the grub\efi and Swap partitions.

I had a problem in the beginning to boot , finally I have fixed it.
Could that be an emacs problem?
I have no idea what I am talking about it is just the name of the settings that I was playing with.
It was my first time to use an Xwayland settings so I was playing around with it to learn.

Funniest thing,
numbers 2 and 1 don't work but combination of ESC+1+2 generates the symbol: "<".

some of the F keys don't work but combinations with Fun and Esc generate other keys and symbols.

My keyboard is Chickony.
I think that layouts of 104 and 105 are wrong for chickony.
I am not sure...

Dietmar what do you suggest?

Quote from Dietmar91

Ich habe in meiner Arbeitszeit einige Laptop-Tastaturen ausgetauscht.

Dabei waren auch Dell-Laptop.

In my working time I have done some laptop keyboards during my working hours.

Dell laptops were also included.

Quote from Dietmar91

Ich habe in meiner Arbeitszeit einige Laptop-Tastaturen ausgetauscht.

Dabei waren auch Dell-Laptop.

In my working time I have done some laptop keyboards during my working hours.

Dell laptops were also included.

Quote from Dietmar91

Lass uns kurz zurück gehen zu dem Satz hier oben.

Ich gestehe - ich bin etwas durcheinander. Reden wir hier von einem PC? Oder von einem Laptop?

Ich hatte früher auch PC's mit PS2-Tastatur. Diese lies sich aber problemlos durch eine USB-Tastatur ersetzen.

Deswegen ist der Satz hier oben etwas irritierend. Selbstverständlich kann man eine PS2-Tastatur durch eine USB-Tastatur

ersetzen. Wobei ein Laptop in der Regel eine eingabaute Tastatur hat und keine PS2-Tastatur - diese kenne ich nur von

Desktop-PC's mit PS2-Buchse. Ich verwende (heute) nur Logitech Keyboard+Maus Kombo's mit USB-Dongle.

Let's go back to the sentence above for a moment.

I confess - I'm a bit confused. Are we talking about a PC here? Or a laptop?

I used to have PCs with a PS2 keyboard. But this could easily be replaced by a USB keyboard.

That's why the sentence above is a bit confusing. Of course you can replace a PS2 keyboard with a USB keyboard.

However, a laptop usually has a built-in keyboard and not a PS2 keyboard - I only know this from desktop PCs with a PS2 socket.

I (currently) only use Logitech keyboard+mouse combos with a USB dongle.
dongle.

Translated with DeepL.com (free version)

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First of all , thanks for helping
Secondly,

I didn't mean I can not use\connect a USB Keyboard or Mouse, I do.
I use a laptop Dell 15 3542.
If I connect a USB keyboard it works fine.

I want to fix the problem with PS/.2 Keyboard because it is weird that it doesn't work only few keys.