keyboard oddity

[Jon LaBadie]

On Sat, Oct 03, 2015 at 11:17:53AM +0800, Ed Greshko wrote:
> 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.
> 

Thanks for the "identifier".  My search turned up nothing.

I considered the Unifying Receiver also but all 3 I had on hand exhibited
the same behavior.

Jon
-- 
Jon H. LaBadie                 jonfu at jgcomp.com
 11226 South Shore Rd.          (703) 787-0688 (H)
 Reston, VA  20190              (703) 935-6720 (C)