linux-kernel - Re: Keys get stuck

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Date:	Thu, 13 Mar 2008 18:56:04 +0100
From:	"Fred ." <eldmannen@...il.com>
To:	"Pavel Machek" <pavel@....cz>
Cc:	"David Newall" <davidn@...idnewall.com>,
	"Jiri Kosina" <jkosina@...e.cz>, linux-kernel@...r.kernel.org
Subject: Re: Keys get stuck

With so many people suffering from this bug (for a long time), and so
many bright people here, why doesn't it get fixed?

...other operating systems don't suffer from this bug...

On Thu, Mar 13, 2008 at 6:14 PM, Pavel Machek <pavel@....cz> wrote:
>
> On Wed 2008-03-12 21:14:56, David Newall wrote:
>  > Jiri Kosina wrote:
>  > > Very probably this is due to broken way how X themselves implement
>  > > auto-repeat, instead of using kernel-provided auto-repeat functionality.
>  >
>  > It should be said that X implements auto-repeat out of necessity.  While
>  > the kernel can report key down and up events, its further interpretation
>  > of those events is not appropriate.  Many combinations of events are
>  > possible, such as keyboard plus mouse, and this precludes the kernel
>  > from providing a full interpretation.  It would be wrong for it to even
>  > try.  X is the proper place to implement auto-repeat for X.
>
>  No.
>
>  hw is proper place to implement autorepeat, and along with some
>  buffering, it has chance to work. Kernel is not real-time, and X are
>  definitely not real-time, while autorepeat is real-time operation.
>
>  It actually mostly works in ps/2 case. Buffer in hardware means that
>  pretty big interrupt delays can be tolerated without problems.
>
>  --
>  (english) http://www.livejournal.com/~pavelmachek
>  (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
>
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