Public bug reported:
I installed Ubuntu 10.10 on Acer Extensa 5235 with Celeron Dual-Core
2GHz. After login into Gnome it shows this alert:
CPU frequency scaling unsupported
I tried
sudo modprobe p4_clockmod
FATAL: Error inserting p4_clockmod
(/lib/modules/2.6.35-23-generic/kernel/arch/x86/kernel/cpu/cpufreq/p4-clockmod.ko):
No such device
I tried to install cpudyn, cpufreqd, powernowd. All packages returned an
error message that the CPU is unsupported.
Is there any way how to activate frequency scaling for this CPU?
Here is the output of /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Celeron(R) Dual-Core CPU T3300 @ 2.00GHz
stepping : 10
cpu MHz : 1995.020
cache size : 1024 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc
arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl tm2 ssse3 cx16 xtpr
pdcm xsave lahf_lm dts
bogomips : 3990.04
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Celeron(R) Dual-Core CPU T3300 @ 2.00GHz
stepping : 10
cpu MHz : 1995.020
cache size : 1024 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
apicid : 1
initial apicid : 1
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat
pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc
arch_perfmon pebs bts aperfmperf pni dtes64 monitor ds_cpl tm2 ssse3 cx16 xtpr
pdcm xsave lahf_lm dts
bogomips : 3989.95
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/697175
Title:
CPU frequency scaling doesn't work with Celeron Dual-Core
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