I am using ArchLinux on an HP Pavilion dv9000t which has overheating problems. I did all what I can do to get a better air flow in the laptop and put a better thermal paste but there is still a problem:the fan stops spinning when the CPU temperature is low (even if the GPU temperature is high, which is problematic).I found out I can get the fan running by launching some heavy processing commands (like the yes command). However, it is not a solution because I need to stop this command when the CPU gets too hot and launch it again when the fan stops (so that the GPU does not get hot).I tried to control the fan using this wiki, but when I run pwmconfig, I get this error:/usr/bin/pwmconfig: There are no pwm-capable sensor modules installedDo you know what can I do to get the fan always spinning?Edit:The sensors-dectect output is the following:~/ sudo sensors-detect # sensors-detect revision 6170 (2013-05-20 21:25:22 +0200)# System: Hewlett-Packard HP Pavilion dv9700 Notebook PC [Rev 1] (laptop)# Board: Quanta 30CBThis program will help you determine which kernel modules you needto load to use lm_sensors most effectively. It is generally safeand recommended to accept the default answers to all questions,unless you know what you're doing.Some south bridges, CPUs or memory controllers contain embedded sensors.Do you want to scan for them? This is totally safe. (YES/no): Module cpuid loaded successfully.Silicon Integrated Systems SIS5595...                       NoVIA VT82C686 Integrated Sensors...                          NoVIA VT8231 Integrated Sensors...                            NoAMD K8 thermal sensors...                                   NoAMD Family 10h thermal sensors...                           NoAMD Family 11h thermal sensors...                           NoAMD Family 12h and 14h thermal sensors...                   NoAMD Family 15h thermal sensors...                           NoAMD Family 15h power sensors...                             NoAMD Family 16h power sensors...                             NoIntel digital thermal sensor...                             Success!    (driver `coretemp')Intel AMB FB-DIMM thermal sensor...                         NoVIA C7 thermal sensor...                                    NoVIA Nano thermal sensor...                                  NoSome Super I/O chips contain embedded sensors. We have to write tostandard I/O ports to probe them. This is usually safe.Do you want to scan for Super I/O sensors? (YES/no): Probing for Super-I/O at 0x2e/0x2fTrying family `National Semiconductor/ITE'...               NoTrying family `SMSC'...                                     NoTrying family `VIA/Winbond/Nuvoton/Fintek'...               NoTrying family `ITE'...                                      NoProbing for Super-I/O at 0x4e/0x4fTrying family `National Semiconductor/ITE'...               NoTrying family `SMSC'...                                     NoTrying family `VIA/Winbond/Nuvoton/Fintek'...               NoTrying family `ITE'...                                      NoSome hardware monitoring chips are accessible through the ISA I/O ports.We have to write to arbitrary I/O ports to probe them. This is usuallysafe though. Yes, you do have ISA I/O ports even if you do not have anyISA slots! Do you want to scan the ISA I/O ports? (YES/no): Probing for `National Semiconductor LM78' at 0x290...       NoProbing for `National Semiconductor LM79' at 0x290...       NoProbing for `Winbond W83781D' at 0x290...                   NoProbing for `Winbond W83782D' at 0x290...                   NoLastly, we can probe the I2C/SMBus adapters for connected hardwaremonitoring devices. This is the most risky part, and while it worksreasonably well on most systems, it has been reported to cause troubleon some systems.Do you want to probe the I2C/SMBus adapters now? (YES/no): Using driver `i2c-i801' for device 0000:00:1f.3: Intel 82801H ICH8Module i2c-dev loaded successfully.Next adapter: nouveau-0000:01:00.0-0 (i2c-0)Do you want to scan it? (yes/NO/selectively): Next adapter: nouveau-0000:01:00.0-1 (i2c-1)Do you want to scan it? (yes/NO/selectively): Next adapter: nouveau-0000:01:00.0-2 (i2c-2)Do you want to scan it? (yes/NO/selectively): Now follows a summary of the probes I have just done.Just press ENTER to continue: Driver `coretemp':  * Chip `Intel digital thermal sensor' (confidence: 9)Do you want to overwrite /etc/conf.d/lm_sensors? (YES/no): Unloading i2c-dev... OKUnloading cpuid... OKThe file /etc/conf.d/lm_sensors contains:HWMON_MODULES=coretempAnd the file /etc/modules-load.d/lm_sensors.conf contains:coretempacpi-cpufreqThe command sensors outputs this:~/ sensorscoretemp-isa-0000Adapter: ISA adapterCore 0:       +46.0C  (high = +85.0C, crit = +85.0C)Core 1:       +47.0C  (high = +85.0C, crit = +85.0C)acpitz-virtual-0Adapter: Virtual devicetemp1:        +49.0C  nouveau-pci-0100Adapter: PCI adaptertemp1:        +60.0C  (high = +95.0C, hyst =  +3.0C)                       (crit = +115.0C, hyst =  +5.0C)                       (emerg = +115.0C, hyst =  +5.0C)
How to force the fan to always spin?
temperature;fan;gpu
I finally decided to choose a hardware solution.I cut two wires from the fan and now the fan always spin (at the max level though).I found this solution in this blog post.