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DragonFly bugs List (threaded) for 2004-12
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Re: Keyboard lockup fixed! (Re: keyboard loss in DF)

From: Jansen Gotis <jtgotis@xxxxxxxxx>
Date: Fri, 17 Dec 2004 00:54:37 +0800

On Thu, 16 Dec 2004 00:35:32 -0800 (PST), Matthew Dillon
<dillon@xxxxxxxxxxxxxxxxxxxx> wrote:
>     I believe I have fixed the problem.  I would like to thank everyone who
>     submitted bug reports on this issue!  The reports were invaluable and I
>     believe I was able to find the problem.
>     Basically the problem is that the keyboard interrupt is edge-triggered,
>     a left-over from the early PC days.  Due to this it is possible for an
>     interrupt to be 'lost' and create a situation where no new interrupt
>     occurs.
>     The keyboard driver has a 10hz poll routine to detect the lost interrupt
>     and get things moving again.  Callout timer work I did in September
>     broke the poll routine.  Without a working poll routine the keyboard
>     can basically stop working under certain latency-related conditions.
>     I would like everyone who reported problems to update their kernels,
>     make sure you have /usr/src/sys/dev/misc/kbd/kbd.c rev 1.14, and retest.
>                                                 -Matt

Just finished building a few minutes ago, and it works! Thanks, Mr. Dillon! =D

- Jansen

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