http://bugzilla.kernel.org/show_bug.cgi?id=10110
Summary: ACPI _PPC limiting processor speed...
Product: ACPI
Version: 2.5
KernelVersion: 2.6.24
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: high
Priority: P1
Component: BIOS
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
Hardware Environment:
- Lenovo T61 8897CTO
- 2.2GHz 4MB L2$ Core2Duo mobile
- 7LETA9WW/2.09 BIOS
Software Environment:
- Ubuntu 8.04 Hardy prerel 64-bit
- confirmed problem exists on:
-> 2.6.24 mainline
-> 2.6.25-rc3 mainline
-> 2.6.23-rc
-> Ubuntu 8.04 Hardy 2.6.24 kernels
Problem Description:
processor speed limited due to _PPC ACPI object - symptom of:
$ dmesg
cpufreq-core: CPU 0: _PPC is 3 - frequency limited
cpufreq-core: CPU 1: _PPC is 0 - frequency not limited
[snip]
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
Steps to reproduce:
1. (optional) ensure BIOS in T61 is late 2007
2. boot 2.6.24 (or 2.6.23-rc, or 2.6.25-rc2)
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