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From: "Daniel J Blueman" <>
To: "Linux Kernel" <>
Subject: [2.6.25-rc3] ACPI _PPC limiting processor speed...
Date: Mon, 25 Feb 2008 21:29:24 +0000	[thread overview]
Message-ID: <> (raw)

My 2.2GHz [1] Thinkpad T61 is unable to get past 1.2GHz, seemingly
because of the _PPC ACPI objects [2].

Given that the _PPC object is different for both cores, is this more
of a BIOS bug or an ACPI interpreter problem? The problem was present
in 2.6.24-rc, 2.6.24 final and since.

BIOS is 7LETA9WW/2.09, so current - would any further information be
useful for debugging this problem, and would dumping the ACPI tables
be useful?


--- [1]

freq-table: table entry 0: 2201000 kHz, 0 index
freq-table: table entry 1: 2200000 kHz, 1 index
freq-table: table entry 2: 1600000 kHz, 2 index
freq-table: table entry 3: 1200000 kHz, 3 index
freq-table: table entry 4: 800000 kHz, 4 index

--- [2]

cpufreq-core: CPU 0: _PPC is 3 - frequency  limited
cpufreq-core: CPU 1: _PPC is 0 - frequency not limited
Daniel J Blueman

             reply	other threads:[~2008-02-25 21:29 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-25 21:29 Daniel J Blueman [this message]
2008-02-25 23:48 ` Andrew Morton
2008-02-26  8:28   ` Daniel J Blueman

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