keyboard oddity

[Ed Greshko]

On 10/03/2015 10:48 AM, Jon LaBadie wrote:
> For several years I have used a Logitech K800 keyboard on my
> primary desktop, currently running Fedora 22.  Recently it
> has been acting up, sending a stream of fives (5's) as if
> I was holding down the five key and it was autorepeating.
>
> The 5's would appear sporadically, sometimes once a day,
> other times every couple of minutes.  They appeared in
> xterm's, browsers, and other GUI apps and also when I
> switched to one of the virtual consoles not running
> X-windows.  The 5's also appeared in virtual guest OS's.
>
> Assuming my keyboard was bad I purchased another kbd,
> Logitech K330.  As expected, no 5's streamed from this
> new kbd.  However when I installed the suspect K800 kbd
> on my other system (running CentOS 7.1), it acts normally,
> no 5's.  Swap it back to Fedora 22, I get 5's.  It has
> now been back to the CentOS system for 10 days and has
> not acted up once.  Only on Fedora 22.
>
> Any clue as to what might cause such behavior on one
> system but not another?
>

Several people have reported this as the "plague of fives" and seem to feel it is kernel related.  I had seen it as well on my system.  I first thought it was the Logitech Unifying Receiver and moved it to a different USB port.  But based on the experience of others I guess it was only a coincidence that they no longer happen for me.

[egreshko at meimei Weather]$ uname -r
4.1.7-200.fc22.x86_64

-- 
In reality, some people should stick to running Windows and others should stay away from computers altogether.