Date: Wed, 9 Jul 1997 16:40:04 -0700 (PDT) From: Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp> To: freebsd-bugs Subject: Re: i386/4030: syscons thinks CTRL is always pressed Message-ID: <199707092340.QAA19845@hub.freebsd.org>
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The following reply was made to PR i386/4030; it has been noted by GNATS.
From: Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
To: hoek@hwcn.org
Cc: FreeBSD-gnats-submit@freebsd.org, yokota@zodiac.mech.utsunomiya-u.ac.jp
Subject: Re: i386/4030: syscons thinks CTRL is always pressed
Date: Thu, 10 Jul 1997 08:43:34 +0900
>> >>Number: 4030
>> >>Category: i386
>> >>Synopsis: syscons thinks CTRL pressed, must reboot [repeatable]
[...]
>Okay, the patch works. However, I can still reproduce the
>problem if I use a slight variation on the first keymap.
>
scan cntrl alt alt cntrl lock
code base shift cntrl shift alt shift cntrl shift state
> 090 cr rctrl nl nl rctrl rctrl nl nl O
>
>Press and hold Alt, then press rctrl. Release all keys. Then
>press `d' or whatever and you'll log out.
Well, it depends on which key you release first!! If you press Alt
then right Ctrl, syscons picks up the fifth field, thinks `rctrl' is
down and set the internal ctrl bit .
Then, if you release Ctrl first, then Alt, syscons correctly picks up
the fifth field again, thinks `rctrl' is released, and clears the
internal ctrl bit.
But, if you release Alt first, then Ctrl, syscons picks up the first
field, and thinks `cr' is released. The internal ctrl bit remains
set....
A tricky bug. But, at the same time I wonder this bug should be
attributed to this rather strange keymap entry...
>The patch, as shown, is good enough for me, since the keymap one
>would have to use to reproduce the bug now is not very useful
>(for me, anyways).
Kazu
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