[SLL] tab button gets stuck down when no keyboard plugged in?

[Larry M. Bateman]

Hello Ben Johnson,

> Hey.
> 
> I'm running a new Linux based point of sale system at one of my sister's
> coffee carts.  for the most part it's going pretty well, and I'm happy
> about this.  :)  I run into a problem from time to time though.  one
> weird problem happened this morning.  I wasn't present but the
> description of the problem led me to believe that the tab button on the
> keyboard had something sitting on it because keyboard focus was changing
> very rapidly from one button to another.  The keyboard wasn't plugged in
> though.  It had been plugged in earlier in the day and was unplugged
> without rebooting the system.  could this be some weirdness with the
> keyboard controller or the driver?  or...  can this be caused by
> something else?  I can't afford to have silly problems like this disable
> the system.  It's a GTK+ app, and as far as I know it doesn't do
> anything with key-press events at all.
> 
> - Ben

I suppose that if the keyboard was unplugged with the TAB key pressed,
that system could still think it's in that state. At the low level,
a key press is two events: a key down action, and a key up action.


-- 
Larry M. Bateman, <LMB at L3sys.com>
    L3 Systems  PO Box 2954, Redmond, WA 98073
    Tel: (425)836-5438  Fax: (425)868-8706