Date: Fri, 28 Apr 2006 12:37:42 +0200 From: Bruno Ducrot <ducrot@poupinou.org> To: Stefan 'Steve' Tell <steve.tell@crashmail.de> Cc: freebsd-stable@freebsd.org Subject: Re: powernow0: no match for extended cpuid 780 Message-ID: <20060428103742.GA16180@poupinou.org> In-Reply-To: <87vesuc152.fsf@zeus.crashmail.de> References: <9sGmNqTehEB@zeus.crashmail.de> <20060426180613.GC4766@poupinou.org> <87vesuc152.fsf@zeus.crashmail.de>
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On Thu, Apr 27, 2006 at 08:40:57PM +0200, Stefan 'Steve' Tell wrote: > Hi, > > first of all a big thanks for your reply. > > * Bruno Ducrot <ducrot@poupinou.org> wrote: > > On Fri, Apr 21, 2006 at 04:11:00PM +0000, Stefan 'Steve' Tell wrote: > > >> powernow0: <PowerNow! K7> on cpu0 > >> powernow0: ACPI MAX frequency not found > >> powernow0: no match for extended cpuid 780 > > > Maybe by chance a BIOS upgrade will be ok. > > Sorry, no chance here. This is always the newest bios version available. :( > > > If that's not the case, or BIOS is alredy the newest, we could resolve > > that issue by hardcoding sane values under the powernow driver, > > or by rewritting the DSDT of this laptop. > > The second solution will give you the oportunity to not have to > > patch powernow for each upgrades. > > This would be great. Do you need more information? What can I do? I think I will take the DSDT override approach. This is explained in the handbook: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/acpi-debug.html So all you have to do is to dump the ACPI tables via: acpidump -t -d > Acer_Aspire_1304LC.asl Give an URL where we can get this file, or if you can't, send it to me privately. I will correct that asl so that after an override of the DSDT (see "11.16.5 Fixing Your ASL" into the handbook), then powernow driver will work. I have already found what are those values from there: http://lug-owl.de/pipermail/linux/2003-July/019183.html especially those lines: + *pst++ = 4; /* 666 MHz */ + *pst++ = 19; /* 1.20 V */ + *pst++ = 6; /* 800 Mhz */ + *pst++ = 19; /* 1.20 V */ + *pst++ = 10; /* 1066 Mhz */ + *pst++ = 19; /* 1.20 V */ + *pst++ = 14; /* 1333 Mhz */ + *pst++ = 11; /* 1.45 V */ + *pst++ = 1; /* 1533 Mhz */ + *pst = 9; /* 1.55 V */ Correcting the DSDT is therefore easy to me. Just in case you wonder, I can't provide a generic workaround under the powernow driver, and if I write a specific workaround for your model into the powernow driver (and I think his maintainer have to change it in order to support more processors soon) you may have trouble and I would have to redo the work. -- Bruno Ducrot -- Which is worse: ignorance or apathy? -- Don't know. Don't care.
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