From: Kronos <kronos@kronoz.cjb.net>
To: Daniele Bonomi <dbonomi@crema.unimi.it>
Cc: cpufreq@www.linux.org.uk
Subject: Re: [Bug 3600] New: Cpu recognization fails after upgrade from 2.6.7 to 2.6.9
Date: Wed, 20 Oct 2004 18:51:10 +0200 [thread overview]
Message-ID: <20041020165110.GA6992@dreamland.darkstar.lan> (raw)
In-Reply-To: <20041020180537.17d0dd7c@paraclito.crema>
Il Wed, Oct 20, 2004 at 06:05:37PM +0200, Daniele Bonomi ha scritto:
> On Wed, 20 Oct 2004 17:47:44 +0200 Kronos <kronos@kronoz.cjb.net> wrote:
>
> > Hi,
> > I saw something similar on my notebook. In my case when the notebook
> > is turned on while using battery BIOS sets CPU speed to a frequency
> > lower than the defaul (800MHz for me). It seems that powernow driver
> > is confused by the BIOS fiddling with CPU speed and fails to load. I
> > had the same symptoms: PST not found and wrong min/max frequencies.
> >
> > Disabling "Automatic CPU power saving" (or something like that) in the
> > BIOS cures the problem for me. Note that this option do not affect
> > power management under linux (or windows), it just controls the CPU
> > before a real OS comes up.
>
> I tried but it didn't worked for me.
> For me doesn't work even if i'm plugged in...
Ok, can you apply this patch to 2.6.9 (and enable debug):
--- a/arch/i386/kernel/cpu/cpufreq/powernow-k7.c 2004-10-20 18:46:51.000000000 +0200
+++ b/arch/i386/kernel/cpu/cpufreq/powernow-k7.c 2004-10-20 18:47:06.000000000 +0200
@@ -597,7 +597,7 @@
rdmsrl (MSR_K7_FID_VID_STATUS, fidvidstatus.val);
/* A K7 with powernow technology is set to max frequency by BIOS */
- fsb = (10 * cpu_khz) / fid_codes[fidvidstatus.bits.MFID];
+ fsb = (10 * cpu_khz) / fid_codes[fidvidstatus.bits.CFID];
if (!fsb) {
printk(KERN_WARNING PFX "can not determine bus frequency\n");
return -EINVAL;
Luca
--
Home: http://kronoz.cjb.net
Se non puoi convincerli, confondili.
next prev parent reply other threads:[~2004-10-20 16:51 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-20 14:13 [Bug 3600] New: Cpu recognization fails after upgrade from 2.6.7 to 2.6.9 bugme-daemon
2004-10-20 15:47 ` Kronos
2004-10-20 16:05 ` Daniele Bonomi
2004-10-20 16:51 ` Kronos [this message]
2004-10-21 10:25 ` Bruno Ducrot
2004-10-21 16:10 ` Kronos
2004-10-23 21:43 ` [PATCH] Fix cpu recognization if BIOS does not set cpu to max freq [was: Re: [Bug 3600] New: Cpu recognization fails after upgrade from 2.6.7 to 2.6.9] Kronos
2004-10-29 15:35 ` Dominik Brodowski
2004-11-10 20:15 ` Bruno Ducrot
2004-11-02 21:10 ` [Bug 3600] New: Cpu recognization fails after upgrade from 2.6.7 to 2.6.9 Dave Jones
2004-11-02 22:13 ` [PATCH for other issue included] " Dominik Brodowski
2004-10-20 19:37 ` Daniele Bonomi
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