linux-kernel - Core i7 not scaling frequency down

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 4 Jul 2009 22:37:32 +0200
From:	Felix von Leitner <felix-linuxkernel@...e.de>
To:	Linux Kernel Mailing list <linux-kernel@...r.kernel.org>
Subject: Core i7 not scaling frequency down

Hi,

I just got a Nehalem CPU and it works OK except that the fans are always
running full power and it produces heat like an oven.

  $ cat /proc/acpi/processor/P001/info
  processor id:            0
  acpi id:                 1
  bus mastering control:   yes
  power management:        yes
  throttling control:      no
  limit interface:         no
  $

Oh, no throttling and no limit support?  How can this be?  I'm using
2.6.30 but this appears to be bogus; Windows scales down the CPU
frequency OK.

Does this mean my BIOS ACPI tables are bogus?

I get this message at boot time, but it appears to be unrelated:

  ACPI Warning (tbutils-0246): Incorrect checksum in table [OEMB] - 00, should be FE [20090320]

Any ideas what I could do now to get the CPU to slow down?

Thanks,

Felix
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/