From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dominik Brodowski Subject: Re: Kernel 2.6.7 speedstep-piix4 on vaio Date: Thu, 29 Jul 2004 23:04:13 +0200 Sender: cpufreq-bounces@www.linux.org.uk Message-ID: <20040729210413.GA7782@dominikbrodowski.de> References: <43210.141.228.156.225.1091110800.squirrel@141.228.156.225> Mime-Version: 1.0 Return-path: Content-Disposition: inline In-Reply-To: <43210.141.228.156.225.1091110800.squirrel@141.228.156.225> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: cpufreq-bounces+glkc-cpufreq=gmane.org@www.linux.org.uk Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Ivor Hewitt Cc: cpufreq@www.linux.org.uk 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