From owner-freebsd-acpi@FreeBSD.ORG Mon Apr 26 09:22:02 2004 Return-Path: Delivered-To: freebsd-acpi@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 0E4AA16A613 for ; Mon, 26 Apr 2004 09:22:02 -0700 (PDT) Received: from snipers.mine.nu (YahooBB219008246026.bbtec.net [219.8.246.26]) by mx1.FreeBSD.org (Postfix) with ESMTP id 96B5C43D54 for ; Mon, 26 Apr 2004 09:22:01 -0700 (PDT) (envelope-from kochi@netbsd.org) Received: from localhost (localhost [127.0.0.1]) by snipers.mine.nu (Postfix) with ESMTP id 33FEB7871C; Tue, 27 Apr 2004 01:22:00 +0900 (JST) Date: Tue, 27 Apr 2004 01:21:59 +0900 (JST) Message-Id: <20040427.012159.74740435.kochi@netbsd.org> To: len.brown@intel.com From: Takayoshi Kochi In-Reply-To: <29AC424F54821A4FB5D7CBE081922E402FE8C6@hdsmsx403.hd.intel.com> References: <29AC424F54821A4FB5D7CBE081922E402FE8C6@hdsmsx403.hd.intel.com> X-Mailer: Mew version 3.3 on Emacs 21.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit cc: freebsd-acpi@freebsd.org cc: kanaoka@netbsd.org Subject: Re: ACPI SCI flags X-BeenThere: freebsd-acpi@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: ACPI and power management development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Apr 2004 16:22:02 -0000 Hi, From: "Brown, Len" Subject: RE: ACPI SCI flags Date: Sun, 25 Apr 2004 21:44:56 -0400 > >> > PIC mode: > >> > force level/low via ELCR always. > >> > >> Did you find that made a difference on some systems? If so, > >which ones? > >> The opinion here was that ELCR is probably EISA-only. > > > >Kanaoka-san reported that if SCI is not set level-trigger, > >the SCI doesn't work properly on his laptop. > >It (Libretto L3) has ALi chipsets (1543 south bridge). > > > >When I tested on my laptop (ThinkPad X31, Intel ICH4), > >it seemed that the setting of ELCR didn't make any difference, though. > > You mean it doesn't work in either case? > Testing it via power button? It DID work in both cases. > Months ago when Linux did the PIC-mode level/low thing, I had > A bunch of users test it, and for many the hardware worked > correctly no matter if ELCR was set to level or edge. > > However, there were others which did care, and only worked > if level triggered. Most of these had a BIOS that had already > set the ELCR to level, but some required the OS to do it. Thanks for the long explanation. I agree that setting ELCR makes sense. --- Takayoshi Kochi