felix-linuxkernel at fefe
Jul 4, 2009, 1:37 PM
Views: 160
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Core i7 not scaling frequency down
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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
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Core i7 not scaling frequency down
