From owner-freebsd-hackers Fri May 12 10:32: 4 2000 Delivered-To: freebsd-hackers@freebsd.org Received: from pawn.primelocation.net (pawn.primelocation.net [205.161.238.235]) by hub.freebsd.org (Postfix) with ESMTP id 40C7C37BE59 for ; Fri, 12 May 2000 10:32:01 -0700 (PDT) (envelope-from cdf.lists@fxp.org) Received: by pawn.primelocation.net (Postfix, from userid 1016) id 9E8D09B1D; Fri, 12 May 2000 13:31:59 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by pawn.primelocation.net (Postfix) with ESMTP id 9378ABA0F; Fri, 12 May 2000 13:31:59 -0400 (EDT) Date: Fri, 12 May 2000 13:31:59 -0400 (EDT) From: "Chris D. Faulhaber" X-Sender: cdf.lists@pawn.primelocation.net To: Warner Losh Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: BROKEN_KEYBOARD_RESET In-Reply-To: <200005121728.LAA12536@harmony.village.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Fri, 12 May 2000, Warner Losh wrote: > In message <200005121429.EAA13692@mauibuilt.com> FreeBSD MAIL writes: > : Is this the kernel setting to dislable ctrl-alt-delete from resetting > : a systtem? If so it seems to be broken in 4.0-RELEASE. > : is there another way of doing this? remaping keyboard perhaps? > : > : # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to > : # reset the CPU for reboot. This is needed on some systems with broken > : # keyboard controllers. > > No. The hot key squence CAD will reboot the system. Or rather it > will cause the init process to get a signal that causes it to reboot > the system. > > BROKEN_KEYBOARD_RESET does something different. In the IBM PC and > newer compatible machines, the keyboard controller part is connected > to a lot of different things, including the reset line to the CPU. > Generally one can get a fairly clean reset of the CPU by telling the > keyboard controller micro controller to reset the CPU with a nice > pulse downt he reset line. Some keyboard controllers didn't think > this was important enough to get right, so they don't implement this > proplerly. These controllers are generally on the 386 and 486 class > of machines and some pentium laptops (exceptions to the rule exist) > where the keyboard controller was still a 8042 microcontroller > programmed to talk to the keyboard. > Since this has been brought up, any reason that BROKEN_KEYBOARD_RESET is not a recognized option (see kern/12927)? ----- Chris D. Faulhaber - jedgar@fxp.org - jedgar@FreeBSD.org -------------------------------------------------------- FreeBSD: The Power To Serve - http://www.FreeBSD.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message