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SubjectRe: Input issues - key down with no key up
On Fri, Aug 15, 2003 at 02:33:07PM +0100, Jamie Lokier wrote:

> Vojtech Pavlik wrote:
> > > Several laptops seem to send a key down event 3, 5 or very many times
> > > in response to a single press.
> >
> > One way this could be handled fairly nicely (although the method is
> > maybe too clever to be good) would be to leave the autorepeat up to the
> > sw, ignore any successive presses without a release and watch whether
> > the keyboard will start autorepeating the key after 250 msec. If it does
> > not, then force the key to be released even if we got no release
> > scancode.
> Perhaps it's too clever, because some users configure the repeat delay
> in their BIOS to longer than 250ms.

The driver programs the delay. The BIOS setting is irrelevant.

> It is fine if you are able to reliably program the keyboard to use the
> 250ms delay, though.

I am.

> Aren't there some keys which report DOWN and UP but which don't repeat?


> The PS/2 keyboard protocol is utterly absurd.

Yep. It's a dozen or more years of hack upon a hack.

Vojtech Pavlik
SuSE Labs, SuSE CR
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