Arch Linux

archer108

Member

From: Zurich Switzerland

Registered: 2007-08-28

Posts: 59

CPU heats up the FAN

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

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 19,797

Re: CPU heats up the FAN

No problem here.  HP Pavilion has been on for weeks.  The CPUs are at 34°C with no fan running.

What processor do you have? Do you have throttling enabled? Did you check to see whether there are any processes that run away on your machine with a kernel > 2.6.29?

---

Nothing is too wonderful to be true, if it be consistent with the laws of nature -- Michael Faraday
Sometimes it is the people no one can imagine anything of who do the things no one can imagine. -- Alan Turing
---
How to Ask Questions the Smart Way

Skripka

Member

From: 2X1280X1024

Registered: 2009-02-19

Posts: 555

Re: CPU heats up the FAN

Do you have throttling enabled?

This for Arch....things go funny with Ubuntu between releases that no one knows or can explain, i.e. hardware working suddenly or not etc.

Last edited by Skripka (2010-01-03 04:10:45)

archer108

Member

From: Zurich Switzerland

Registered: 2007-08-28

Posts: 59

Re: CPU heats up the FAN

ok here some info:
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        : 800.000
cache size    : 4096 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    : 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 pbe nx lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm lahf_lm tpr_shadow vnmi flexpriority
bogomips    : 4389.91
clflush size    : 64
power management:

cat /proc/acpi/processor/CPU0/info
processor id:            0
acpi id:                 1
bus mastering control:   yes
power management:        yes
throttling control:      yes
limit interface:         yes
- same for CPU1 -

cat /proc/acpi/processor/CPU0/throttling
state count:             8
active state:            T0
state available: T0 to T7
states:
   *T0:                  100%
    T1:                  88%
    T2:                  75%
    T3:                  63%
    T4:                  50%
    T5:                  38%
    T6:                  25%
    T7:                  13%
- same for CPU1 -
can it be that T0 on 100% creates the heat, and if yes how I change this value, read something that the throttling is misunderstood by the new kernel

Skripka

Member

From: 2X1280X1024

Registered: 2009-02-19

Posts: 555

Re: CPU heats up the FAN

ok here some info:
SNIP

Was this info while under Arch or Ubuntu-it shows CPU throttling as active.

Oxyd

Member

From: Czech Republic

Registered: 2008-01-17

Posts: 167

Re: CPU heats up the FAN

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)

Skripka

Member

From: 2X1280X1024

Registered: 2009-02-19

Posts: 555

Re: CPU heats up the FAN

delete pls

Last edited by Skripka (2010-01-03 23:26:25)

archer108

Member

From: Zurich Switzerland

Registered: 2007-08-28

Posts: 59

Re: CPU heats up the FAN

these infos where under Ubuntu, but after a reinstall of Arch ist seems to be fixed, all the Info from above are showing up now also on Arch, FAN does hardly spins up, actually not at all. Temparatur seems to be ok for a Intel CPU   Core 0:  +56.0°C  (high = +100.0°C, crit = +100.0°C)  at the moment running with cpufreq on powersave, this has to be adjusted later on, just happy that laptop is not noisy any longer.