Ubuntu

Strange keyboard behavior on c key

Asked by Philip Smith

On latest LTS with everything updated.

I seem to get this occasional behavior where the c key just keeps repeating and the only way I can stop this is by interrupting with the delete key. This has happened across a number of different apps.

The simplest example I can find is when I am in a terminal window perhaps tail -f on a log then I interrupt with a Ctrl^C and then I'll get a load of cccccccccccccccccccc in the terminal window.

I thought this might be a wayland thing but I switched to x.org and its still happening.

Just wondering what I might do next to see if I can get to the bottom of this.

Machine is an X1 Carbon Gen 12.

Question information

Language:
English Edit question
Status:
Needs information
For:
Ubuntu Edit question
Assignee:
No assignee Edit question
Last query:
Last reply:
Revision history for this message
Philip Smith (smitp33) said : 		#1

Another note - mechanically the key seems fine.

Revision history for this message
actionparsnip (andrew-woodhead666) said : 		#2

If you plug the keyboard into a windows system....is it the same?

Revision history for this message
Philip Smith (smitp33) said : 		#3

I can't plug it into a windows system as its the laptop keyboard. But what I can also say is that when I have an external keyboard attached the same issue occurs - hence I don't think its the keyboard. I think its something to do with how some of the key presses are being interpreted.

I am aware that Ctrl-C within the terminal is more of a cancel operation vs Ctrl-C within many other apps where that is the Copy function.

Revision history for this message
Ryan Haris (ryanharis981) said : 		#4

This is a very helpful Ubuntu support thread that addresses important system configuration issues. As a business that relies on stable operating systems for our operations at Royale Beauty Spa, we find community-driven solutions like this invaluable for troubleshooting technical challenges. The detailed explanations and step-by-step guidance provided here demonstrate the power of open-source community support. Thanks to everyone contributing to these solutions - it helps small businesses maintain their technical infrastructure efficiently! https://royaleaestheticsandbeauty.com/liposuction/thigh-and-buttocks/

Revision history for this message
actionparsnip (andrew-woodhead666) said : 		#5

Ah apologies. I though it was USB based and external.

If you boot a different (non-ubuntu) based system like Suse or Fedora, is it different there? Just to explore the issue.

Is it the same in the Ubuntu live USB boot?

Revision history for this message
metalworksbc (driveway-gate) said : 		#6

This is a tricky issue. Since it happens with an external keyboard too, it's likely a software/driver problem. Try booting from a Ubuntu Live USB - if the problem disappears, it's a configuration issue in your main installation.

At <a href="https://metalworksbc.com/" rel="nofollow">Metalworks BC</a>, we see similar principles: whether troubleshooting keyboard inputs or fabricating custom steel railings, the key is isolating variables to find the root cause. Hope you resolve this soon!

Can you help with this problem?

Provide an answer of your own, or ask Philip Smith for more information if necessary.

To post a message you must log in.