Date: Mon, 26 Apr 2004 01:41:12 +0900 (JST) From: Takayoshi Kochi <kochi@netbsd.org> To: nate@root.org Cc: kanaoka@netbsd.org Subject: Re: ACPI SCI flags Message-ID: <20040426.014112.74748210.kochi@netbsd.org> In-Reply-To: <20040421194653.F40302@root.org> References: <BF1FE1855350A0479097B3A0D2A80EE002FF25F0@hdsmsx402.hd.intel.com> <20040421194653.F40302@root.org>
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Hi, From: Nate Lawson <nate@root.org> Subject: Re: ACPI SCI flags Date: Wed, 21 Apr 2004 19:48:52 -0700 (PDT) > On Fri, 9 Apr 2004, Brown, Len wrote: > > Nate, > > > > I think we finally got the vague part of the ACPI spec > > regarding SCI polarity/trigger cleared up. In Linux > > as of 2.4.26 and 2.6.5 we now do this: > > > > 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. --- Takayoshi Kochi
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