From: bernd.westermann@it-west.de
Subject: Re: powernow-k8: overflow on vid write on AMD64 3000 Venice
Date: Sun, 28 Aug 2005 11:44:56 +0200
Message-ID: <200508281144.56972.bernd.westermann@it-west.de>
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Hello List,

problem solved. I patch the linux-2.6.12.5 kernel with the latest powernow-k8 
driver from AMD. It will be in 2.6.13 by default.

Bernd

Am Samstag, 27. August 2005 17:48 schrieb bernd.westermann@it-west.de:
> Hello List,
>
> powernow-k8 does not run on my AMD 64 3000 Venice CPU. If I try to set
> performance governor, I get the following error:
>
> powernow-k8: internal error - overflow on vid write
> powernow-k8: internal error - overflow on vid write
>
> Reason: He wants to set VID=0x6 but he gets maxvid=0x4 from
> MSR_FIDVID_STATUS. So it changed reqvid to 0x4 a nd I get these error.
>
> At the beginning powernow-k8 tells:
> powernow-k8: Found 1 AMD Athlon 64 / Opteron processors (version 1.40.4)
> powernow-k8:    0 : fid 0xa (1800 MHz), vid 0x6 (1400 mV)
> powernow-k8:    1 : fid 0x2 (1000 MHz), vid 0x12 (1100 mV)
> cpu_init done, current fid 0x9, vid 0x6
>
> After I hardcoded the maxvid to 0x6 all govenors running fine. Is there an
> wrong value in the processor core? Can we change something in powernow-k8?
>
> My System:
> CPU: AMD64 3000 Venice
> Mainboard: ECS nforce4-939
> Linux: Gentoo 2005.1 64bit
> Kernel: 2.6.12.5 (2.6.12-gentoo-r9)
>
>
> Best regards
>
> Bernd
>
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