Mailinglist Archive: opensuse-kernel (69 mails)

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Re: [opensuse-kernel] kernel & BIOS report (incorrectly?) different current/available speeds for overclocked CPU
  • From: PGNet Dev <>
  • Date: Mon, 3 Aug 2009 07:22:14 -0700
  • Message-id: <94f2e81e0908030722m4c0365b2oa3e5c774308b483@xxxxxxxxxxxxxx>

On Mon, Aug 3, 2009 at 12:34 AM, Jan Beulich<JBeulich@xxxxxxxxxx> wrote:
      (1) is this a bug, or expected behavior for OC'ing?
      (2) if a bug, is it in kernel, or BIOS?

BIOS: Both this

      available frequency steps: 2.80 GHz, 2.10 GHz, 1.60 GHz, 800 MHz

and (presumably, as you didn't show it) /var/log/messages would confirm
this. The identifiers for the corresponding frequencies are stored in ACPI
tables and/or MSRs, so if the BIOS "supported" overclocking, it would have
to update these tables/registers (the actual frequencies get calculated
from these identifiers).

The value /proc/cpuinfo reports is simply one of the frequencies reported
as available.

thanks for clarifying how this works. i'll take it up with the mobo vendor.

thanks again !
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