http://bugzilla.kernel.org/show_bug.cgi?id=9586
Summary: ACPI Error [...] AE_NOT_FOUND -> Cpu frequency scaling
not working on C2D T7500
Product: ACPI
Version: 2.5
KernelVersion: 2.6.23.11 vanilla
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: BIOS
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
CC: [EMAIL PROTECTED]
Most recent kernel where this bug did not occur:
Distribution: Ubuntu Gutsy 7.10 64bit
Hardware Environment: HP Pavillon dv2699el (dv2500 series) laptop
Software Environment: latest gutsy 64bit packages
Problem Description:
cpu frequency scaling not working, seems not recognized at all for CPU. Maybe
the culprit is the Phoenix Bios (using latest version F.21 available), as it
seems that it only allows MS Vista to manage ACPI functions (on Vista all
working well).
When modprobing acpi-cpufreq or speedstep-centrino or any other frequency
scaling module I get this error:
FATAL: Error inserting acpi_cpufreq
(/lib/modules/2.6.23.11-vanilla/kernel/arch/x86_64/kernel/cpufreq/acpi-cpufreq.ko):
No such device
No frequency scaling support seems to be available for cpu.
[EMAIL PROTECTED]:~$ ls /sys/devices/system/cpu/
cpu0 cpu1 sched_mc_power_savings
[EMAIL PROTECTED]:~$ ls /sys/devices/system/cpu/cpu0/
cache crash_notes thermal_throttle topology
Cpu info:
[EMAIL PROTECTED]:~$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Duo CPU T7500 @ 2.20GHz
stepping : 11
cpu MHz : 2194.742
cache size : 4096 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall nx lm
constant_tsc pni monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips : 4394.01
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
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