CPU heats up the FAN

Question

There must be something on Kernel 2.6.30 and above, which makes PC heating up unnecessary. At the moment runing back to Ubuntu 9.04 with CPU temperature +48.0°C
On Arch or Ubuntu above Kernel 2.6.29,  the heat of the CPU goes easily over +60°C which makes work on HP Compaq 6510b laptop impossible without noisy CPU fan.
I read about users writing the same problem, on different Distros. I stay back on Kernel 2.6.29 (Ubuntu 9.04) which works without CPU heat problem.
Any real work around on that problem is greatly appreciated

Answer 1

I have a simillar problem here.  Installed Arch on my Christmas laptop, but under Arch the fan is spinning almost constantly.  While in the preinstalled Vista it only spun up when the computer started doing something.  I have not tested with other distros.  I have cpufreq running and using the ondemand governor, but it only supports 1.2 and 1.3 (full speed) GHz.  I don't know if 1.2 GHz is the lowest the CPU really can go and googling my CPU doesn't reveal much.
My infos:
/proc/cpuinfo:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Genuine Intel(R) CPU U4100 @ 1.30GHz
stepping : 10
cpu MHz : 1200.000
cache size : 2048 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
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 pbe syscall nx lm constant
_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl est tm2
ssse3 cx16 xtpr pdcm xsave lahf_lm
bogomips : 2594.55
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 : Genuine Intel(R) CPU U4100 @ 1.30GHz
stepping : 10
cpu MHz : 1200.000
cache size : 2048 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 13
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 pbe syscall nx lm constant
_tsc arch_perfmon pebs bts rep_good aperfmperf pni dtes64 monitor ds_cpl est tm2
ssse3 cx16 xtpr pdcm xsave lahf_lm
bogomips : 2594.58
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:
/proc/acpi/processor/CPU0/info
processor id: 0
acpi id: 0
bus mastering control: no
power management: yes
throttling control: no
limit interface: no
uname -a
Linux fury 2.6.32-ARCH #1 SMP PREEMPT Sat Dec 26 09:02:58 CET 2009 x86_64 Genuine Intel(R) CPU U4100 @ 1.30GHz GenuineIntel GNU/Linux
sensors: (the machine has been sitting idle on my table for a few hours now, with loadavg of 0.00, 0.00, 0.00):
coretemp-isa-0000
Adapter: ISA adapter
Core 0: +50.0°C (high = +105.0°C, crit = +105.0°C)
coretemp-isa-0001
Adapter: ISA adapter
Core 1: +50.0°C (high = +105.0°C, crit = +105.0°C)