Ctrl keys not working at all

Hi There, On an old laptop (Toshiba Satellite L500) with a french keyboard, I tried several OS during the last days (win 10 ; linux mint and Zorin OS).

Zorin OS is my favorite OS but both ctrl keys (right and left) doesnt work on it (that keys works on linux mint). I tried the gnome-tweark without success and others french keyboards settings. It's a fresh install.

Is there any way to see if the keys are really working (something like a visual keyboard)?

Update : the Ctrl key works as expected on an external keyboard (it seems that it's a hardware problem with integrated keyboard...)

Any help is welcome!

Best regards

Try to switch to Xorg, because it is an old notebook.
Logout and at login click on your username then a cog wheal appears at the bottom right corner. There you can switch between Xorg and Wayland.

At settings >accessibility you can find a virtual keyboard.

Nice help but switching between Xorg and wayland doesn't work in my case.

I will give a try with an external keyboard.

Thank you for help

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Were you not able to switch between Xorg and Wayland because of automatic login or did it not help?

It did not solve the ctrl key problem, I switch between Xorg and Wayland easily with your help. :+1:

Did you check at settings > accessibility if "locate pointer" is enabled? If it is enabled turn it off for testing.

Diagnosis: The Ctrl key works as expected on an external keyboard

It seems that it's a hardware problem with integrated keyboard of the laptop...

Nice idea but locate pointer is disabled.

I have just stumbled on this Ubuntu item referring to showkey .
As ZorinOS is based on Ubuntu, maybe that is available and can help find out what the Ctrl keys on laptop keyboard actually do (if anything).
See https://askubuntu.com/questions/245333/getting-character-key-code-mappings-in-ubuntu

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Welcome to the Forum!

What Keyboard Layout is set up? I mean specific what french Layout.

Hi There,
As running "xev" from a terminal, (of course, mouse pointer placed in this new window), pressing the Ctrl Keys produce... nothing. The others keys produce keyrelease event + a short description.

I try several keyboard layout (french; french obsolete; french without dead keys; english...), unfortunately nothing works.

In addition, I try to replace the USB installation media, start on it -> try or install zorin OS. During check process, I'm not able to press Ctrl + C to cancel all filesystems checks (hardware issue?).

I recheck the keyboard internal connection (because I remove/replace it as cleaning vent-radiator inside the laptop) -> same issue.

Give a try with linux mint installer -> same issue

It seems like a keyboard failure?

Could be. Do You have the same Issue with any other Keys?

If you are not too bothered about the keyboard's future, you could try squirting a little switch cleaner (e.g. isopropyl alcohol) under the affected keys and then tap them to see if that cleans up any physical contacts.
If you are able to get to the internal keyboard connector, inspect that for contact condition and if not loose etc. If a laptop, I accept that may be a challenge.

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No, only Ctrl (Left) and Ctrl (Right) are unusable. All the other keys work as expected.

On a laptop, that's not a piece of cake. I will give a try. Thanks!