From: Dominik Brodowski <linux@dominikbrodowski.de>
To: Ivor Hewitt <ivor@ivor.org>
Cc: cpufreq@www.linux.org.uk
Subject: Re: Kernel 2.6.7 speedstep-piix4 on vaio
Date: Thu, 29 Jul 2004 23:04:13 +0200 [thread overview]
Message-ID: <20040729210413.GA7782@dominikbrodowski.de> (raw)
In-Reply-To: <43210.141.228.156.225.1091110800.squirrel@141.228.156.225>
Hi,
On Thu, Jul 29, 2004 at 03:20:00PM +0100, Ivor Hewitt wrote:
> Hi,
>
> Firstly should the speedstep-smi driver be able to work on a Vaio Z600TEK
> (Coppermine P3, 440BX chipset)?
Possibly.
> Given that I now have the piix driver working, should it be possible to make
> the smi driver work? i.e. is the smi just a better way of doing the same thing
> and anything that the old driver did should be possible in the new one?
No, the SMI driver does things differently. the -piix4 driver changes an
output signal of the southbridge which might or might not be connected to
the appropriate "intel speedstep logic" to switch speeds. the -smi driver
tries to talk to the BIOS which knows how to switch speeds, but sometimes
the BIOS doesn't understand us, as it only understands an undocumented
language [== undocumented values]...
Therefore, the speedstep-smi driver contains a few tweaks which modify the
"language" a bit: have you tried passing the module options
"smi_port=0xb2 smi_cmd=0x82" yet? On several systems, the smi_cmd is set
wrongly by default.
> PS Is there a searchable archive of this list?
Possibly @ gmane, but I don't know how far back that archive goes...
Dominik
next prev parent reply other threads:[~2004-07-29 21:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-07-29 14:20 Kernel 2.6.7 speedstep-piix4 on vaio Ivor Hewitt
2004-07-29 21:04 ` Dominik Brodowski [this message]
2004-07-30 20:20 ` Ivor Hewitt
2004-08-02 19:31 ` Dave Jones
2004-08-02 20:27 ` Dominik Brodowski
2004-08-02 20:49 ` Dave Jones
2004-08-02 21:31 ` Dominik Brodowski
2004-08-02 20:44 ` Ivor Hewitt
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