lkml.org 
[lkml]   [2003]   [Aug]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Input issues - key down with no key up
On Thu, 21 Aug 2003, Jamie Lokier wrote:

> The user doesn't care if it's PS/2 compliant or not. It must work,
> that is the only important thing. Even more so, given it is flawless

Yep, but "work" is ambiguous. What one considers working, someone else
may consider insufficient. That's why there are various quality goods out
there -- someone might want to sacrifice quality to get a low price and
someone else might want to get best quality he can afford.

> Perhaps you can detect a keyboard being unplugged by periodically
> sending it Echo commands (EE), or any other command to which it responds.

Due to communication latencies and the system load it would be
unreasonable to send an echo request more often than once, perhaps twice
per second. And it's quite easy to unplug and then plug a keyboard back
in a shorter time.

Disabling the translation in the onboard 8042 solves the problem and I am
quite surprised there are problems with that. After all a pass-through
mode is easier to implement than a cooked one -- it's essentially a no-op.

--
+ Maciej W. Rozycki, Technical University of Gdansk, Poland +
+--------------------------------------------------------------+
+ e-mail: macro@ds2.pg.gda.pl, PGP key available +

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:47    [W:0.081 / U:0.716 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site