Re: VIA ACPI power management controller

From: Alexander Leidinger <Alexander_at_Leidinger.net>
Date: Fri, 6 Jun 2003 13:02:24 +0200
On Thu, 05 Jun 2003 10:14:39 -0700
Terry Lambert <tlambert2_at_mindspring.com> wrote:

> Alexander Leidinger wrote:
> > Terry Lambert <tlambert2_at_mindspring.com> wrote:
> > > Be aware that if your machine is a "B" (82C686B), then you have
> > 
> > It is.

I'm not that sure anymore... see below.

> > > the buggy version of the chip; you need to eiter not use the
> > > second IDE channel for anything, or you need a BIOS update, or
> > 
> > Not using the second IDE channel: not an option.
> 
> Additional PCI IDE controller...

Having this information available via ACPI isn't worth that much money
for me. I already get thermal information with xmbmon.

> > BIOS update: how do I know if the latest BIOS for the port has the
> > appropriate fix? I don't think the support people know enough to answer
> > such a question.
> 
> They had better, or you had better find a different vendor.

It's an old board (KT133A chipset), my desktop system. I don't care that
much, and I don't expect the vendor to support it for that long
(typically I'm more optimistic, but it seems I know too much about how
bad the world in reality is now).

> Basically:
> 
> o	Disable PCI master read caching
> o	Lower PCI latency to "0-32"
> o	Disable PCI delay transaction
> 
> Yes, it's ugly on your PCI throughput; you are better off adding
> an IDE interface on a PCI card, IMO.

I'm a little bit confused now...
atapci0: <VIA 82C686B UDMA100 controller> port 0xd000-0xd00f at device 7.1 on pci0
viapropm0: <VIA VT82C686A Power Management Unit> port 0x5000-0x500f at device 7.4 on pci0
pcm0: <VIA VT82C686A> port 0xe400-0xe403,0xe000-0xe003,0xdc00-0xdcff irq 5 at device 7.5 on pci0

I think I should look at the chip itself...

Bye,
Alexander.

-- 
            Yes, I've heard of "decaf." What's your point?

http://www.Leidinger.net                       Alexander _at_ Leidinger.net
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Received on Fri Jun 06 2003 - 02:02:49 UTC

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