Chattering Keyboard?

[Tim Evans]

$ uname -a
Linux osprey 6.1.15-200.fc37.x86_64 #1 SMP PREEMPT_DYNAMIC Fri Mar  3 
17:29:44 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux


Looks  like I have a chattering keyboard.  Idle terminal looks like 
someone's repeatedly hitting <ENTER>.  Ditto on virtual terminal. 
keystrokes being  duplicated in graphical apps like Thunderbird. Pace of 
the extra stuff seems random.  Sometimes it goes 20-30 seconds; others, 
just a few seconds.

Don't see any journalctl ofutput of interest.   Other than going out to 
find a new keyboard,  other suggestions welcome.  Thanks............

[Tom Horsley]

On Sun, 5 Mar 2023 14:36:36 -0500
Tim Evans wrote:

>  Don't see any journalctl ofutput of interest.   Other than going
> out to 
>  find a new keyboard,  other suggestions welcome.  Thanks............ 
Probably new keyboard, but I remember once having characters constantly
repeating and found it was some Gnome accessibility setting that
said "you've accidentally rested you hand on a key for a while, you must
want me to stream thousands of those" :-). Turned off the accessibility
stuff and problem went away.

[Tim Evans]

On 3/5/23 14:36, Tim Evans wrote:
>  $ uname -a
>  Linux osprey 6.1.15-200.fc37.x86_64 #1 SMP PREEMPT_DYNAMIC Fri Mar  3 
>  17:29:44 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
>  
>  
>  Looks  like I have a chattering keyboard.  Idle terminal looks like 
>  someone's repeatedly hitting <ENTER>.  Ditto on virtual terminal. 
>  keystrokes being  duplicated in graphical apps like Thunderbird. Pace of 
>  the extra stuff seems random.  Sometimes it goes 20-30 seconds; others, 
>  just a few seconds.
>  
>  Don't see any journalctl ofutput of interest.   Other than going out to 
>  find a new keyboard,  other suggestions welcome.  Thanks............ 
Found an old keyboard in the basement.  Swapped it in and the problem 
disappeared.

[Tim]

On Sun, 2023-03-05 at 17:21 -0500, Tim Evans wrote:
>  Found an old keyboard in the basement.  Swapped it in and the problem
>
>  disappeared. 
Now you can pull apart the faulty one and see if you can clear the
fault, without worrying if you fail.

Membrane keyboards (the ones with two plastic sheets with conductive
traces on them) can fail when grot gets between the sheets.  Likewise,
with a similar single-sheet construction, where there's conductive pads
on each key.

I have a cheap illuminated mechnical keyboard, one of the LEDs went
intermittent and the keyboard started double typing various keys.  I
resoldered the LED and the fault cleared.  I'm guessing it was spiking
and upsetting the keyboard scanner.
 
-- 
 
uname -rsvp
Linux 3.10.0-1160.83.1.el7.x86_64 #1 SMP Wed Jan 25 16:41:43 UTC 2023 x86_64
 
Boilerplate:  All unexpected mail to my mailbox is automatically deleted.
I will only get to see the messages that are posted to the mailing list.