I have a PC which overheats and shuts down without warning. I installed lm-controls and fancontrol. I ran sensors detect and said yes to all questions.  I typed   sudo service kmod start   When I try pwmconfig, I get   There are no pwm-capable sensor modules installed   When I typed sensors, I saw the CPU was already over 80 Celsius. So I turned it off.  sensors:  coretemp-isa-0000  Adapter:ISA adapter  Core 0:   + 84.0°C (high = +80.0C, crit = +90.0C)  Core 1:   + 82.0°C (high = +80.0C, crit = +90.0C)   After this, I got lost. I found instructions about how to configure the PC so that such a temperature triggers such and such an action, but this is not really what I want: too complicated.   I would like a way to set up all fans at maximum speed, and I don't mind having to type this command each time I turn on this machine. Never mind the temperature, turn them on at full speed from the moment the PC starts working, then maybe it will stay on a little longer...   For the moment, it crashes after half an hour, or one hour, depending upon what I'm doing.   To manage do-release-upgrade, I had to bring the pc outside when the temperature was around zero. What shall I do during summer?
122668
I'm trying to control the fan speed of my MSI GS60-2PC laptop on Ubuntu 16.04. But pwmconfig reports that There are no pwm-capable sensors modules installed  I'm pretty sure these fans can be controlled, because some utilies on Windows can control them. What I've done  I've run sensors-detect (as root) like this:  yes | sensors-detect    It seems to only detect &quot;coretemp&quot;. .  Then pwmconfig (as root): pwmconfig    And  There are no pwm-capable sensors modules installed.  I've tried the following things, which didn't work:  Adding to grub (and then rebooting): acpi_osi=Linux Adding to grub (and then rebooting): acpi_osi=!Windows 2012 Adding to grub (and then rebooting): acpi_enforce_resources=lax    What I get when I run the sensors command acpitz-virtual-0 Adapter: Virtual device temp1:        +27.8°C  (crit = +105.0°C) temp2:        +29.8°C  (crit = +105.0°C) temp3:        +50.0°C  (crit = +100.0°C)  coretemp-isa-0000 Adapter: ISA adapter Physical id 0:  +48.0°C  (high = +84.0°C, crit = +100.0°C) Core 0:         +48.0°C  (high = +84.0°C, crit = +100.0°C) Core 1:         +44.0°C  (high = +84.0°C, crit = +100.0°C) Core 2:         +46.0°C  (high = +84.0°C, crit = +100.0°C) Core 3:         +44.0°C  (high = +84.0°C, crit = +100.0°C)  EDIT:
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I recently noticed my computer is highly sluggish (recent install of Kubuntu 13.04 by the way). I have a Toshiba Satellite P70-A PSPLPC-01Y007 laptop with an Intel i7 quad-core, 16 GB of ram. It appears to look correct in the kinfo. So I ran mpstat -P ALL:  Linux 3.8.0-30-generic (Isogen)         13-09-02        _x86_64_        (1 CPU)  10:07:13 AM  CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal  %guest   %idle 10:07:13 AM  all   11.07    3.02    2.90   36.25    0.00    0.12    0.00    0.00   46.64 10:07:13 AM    0   11.07    3.02    2.90   36.25    0.00    0.12    0.00    0.00   46.64   I noticed when I had chrome open with 10 tabs, typical of an engineer, but it kept freezing horribly. After I ran top, I realized the CPU kept hitting 100% and only one CPU/core is listed. Couldn't find a solution so far. How can I get it to register all 4 cores?  cat /proc/cpuinfo | grep -E "(core|model\ name)" model name      : Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz core id         : 0 cpu cores       : 1   as well as  sudo grep -i smp /var/log/syslog Sep  2 10:02:41 Isogen kernel: [    0.000000] Linux version 3.8.0-30-generic (buildd@roseapple) (gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-1ubuntu1) ) #44-Ubuntu SMP Thu Aug 22 20:52:24 UTC 2013 (Ubuntu 3.8.0-30.44-generic 3.8.13.6) Sep  2 10:02:41 Isogen kernel: [    0.000000] found SMP MP-table at [mem 0x000fe1b0-0x000fe1bf] mapped at [ffff8800000fe1b0] Sep  2 10:02:41 Isogen kernel: [    0.000000] smpboot: Allowing 1 CPUs, 0 hotplug CPUs Sep  2 10:02:41 Isogen kernel: [    0.010390] Freeing SMP alternatives: 24k freed Sep  2 10:02:41 Isogen kernel: [    0.062244] smpboot: CPU0: Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz (fam: 06, model: 3c, stepping: 03) Sep  2 10:02:41 Isogen kernel: [    0.063005] smpboot: Total of 1 processors activated (4788.97 BogoMIPS) Sep  2 11:18:52 Isogen kernel: [    0.000000] Linux version 3.8.0-30-generic (buildd@roseapple) (gcc version 4.7.3 (Ubuntu/Linaro 4.7.3-1ubuntu1) ) #44-Ubuntu SMP Thu Aug 22 20:52:24 UTC 2013 (Ubuntu 3.8.0-30.44-generic 3.8.13.6) Sep  2 11:18:52 Isogen kernel: [    0.000000] found SMP MP-table at [mem 0x000fe1b0-0x000fe1bf] mapped at [ffff8800000fe1b0] Sep  2 11:18:52 Isogen kernel: [    0.000000] smpboot: Allowing 1 CPUs, 0 hotplug CPUs Sep  2 11:18:52 Isogen kernel: [    0.010393] Freeing SMP alternatives: 24k freed Sep  2 11:18:52 Isogen kernel: [    0.062271] smpboot: CPU0: Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz (fam: 06, model: 3c, stepping: 03) Sep  2 11:18:52 Isogen kernel: [    0.063032] smpboot: Total of 1 processors activated (4788.73 BogoMIPS)   EDIT: But when I run sudo lshw -class cpu, I get this:  *-cpu                           description: CPU        product: Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz        vendor: Intel Corp.        physical id: 4        bus info: cpu@0        version: Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz        serial: To Be Filled By O.E.M.        slot: U3E1        size: 2400MHz        capacity: 2400MHz        width: 64 bits        clock: 100MHz        capabilities: x86-64 fpu fpu_exception wp 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 pdpe1gb rdtscp constant_tsc arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 fma cx16 xtpr pdcm pcid sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm ida arat epb xsaveopt pln pts dtherm tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid        configuration: cores=4 enabledcores=4 threads=8   So it recognizes that it has 4 cores with 8 threads, as well as says that all 4 cores are enabled. It is also hyper-thread, so even if running only on one core, it should see two.
99457
I am using a BK Precision 2709B multimeter and attempting to measure the current of a device that runs off of a ~3.7V battery. The device boots up, initializes and then goes into its lower power state. If I use the 10A setting, my device boots up just fine but I need to measure uA or mA. When I attempt to use the mA setting, the device attempts to boot and then continuously reboots. Its not able to finish its initialization process before it cuts off. The current reading on the meter is ~30mA before the device cuts off and attempts to boot up again. The meter says 400mA max, so it doesn't seem like it is over the maximum allowed current for the mA setting. Is there anything I can do to get past the initialization so I can measure the lower power state?
64065
I have a kubuntu 14.04 with the latest HWE kernel (3.16.0-31-generic), and a Xeon 1246v3 processor (which is basically an i7 4770 with ecc support). The processor has base frequency of 3.5 ghz, and max turbo frequency of 3.9 ghz.  I have the following questions:  1) I have intel p-states enabled by default, which is fine, but you know that with p-states you only get two governors: performance, and powersave. How can I manually set the maximum allowed cpu frequency?  2) As stated above, the cpu should be able to run at 3.9 only with one core loaded. With full load on all cores, it should not be able to go over 3.5 ghz. But if I issue the command watch -n 0 "cat /proc/cpuinfo | grep -i mhz" , I see that ALL four cores are constantly at 3.9 ghz, which should be impossible. How's that?  Thanks!
33172
My PC (Lenovo Ideapad z580) is overheating while running Ubuntu GNOME 16.04 LTS.  $ uname -a Linux Mahadev 4.4.0-72-generic #93-Ubuntu SMP Fri Mar 31 14:07:41 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux  $ lspci -nnk|grep -A2 VGA 00:02.0 VGA compatible controller [0300]: Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09)   Subsystem: Lenovo 3rd Gen Core processor Graphics Controller [17aa:3977]   Kernel driver in use: i915   $ sensors acpitz-virtual-0 Adapter: Virtual device temp1:        +52.0°C  (crit = +104.0°C)  coretemp-isa-0000 Adapter: ISA adapter Physical id 0:  +54.0°C  (high = +72.0°C, crit = +90.0°C) Core 0:         +54.0°C  (high = +72.0°C, crit = +90.0°C) Core 1:         +54.0°C  (high = +72.0°C, crit = +90.0°C)  update vivek@Mahadev:~$ stress -t 300 -c $(getconf _NPROCESSORS_ONLN) &amp;&amp;  sensors stress: info: [4408] dispatching hogs: 4 cpu, 0 io, 0 vm, 0 hdd stress: info: [4408] successful run completed in 300s acpitz-virtual-0 Adapter: Virtual device temp1:        +73.0°C  (crit = +104.0°C)  coretemp-isa-0000 Adapter: ISA adapter Physical id 0:  +72.0°C  (high = +72.0°C, crit = +90.0°C) Core 0:         +69.0°C  (high = +72.0°C, crit = +90.0°C) Core 1:         +72.0°C  (high = +72.0°C, crit = +90.0°C)  update     vivek@Mahadev:~$ sudo lshw -C cpu     [sudo] password for vivek:    *-cpu                             description: CPU         product: Intel(R) Core(TM) i3-3110M CPU @ 2.40GHz         vendor: Intel Corp.        physical id: 0        bus info: cpu@0        version: Intel(R) Core(TM) i3-3110M CPU @ 2.40GHz        serial: To Be Filled By O.E.M.        slot: CPU Socket - U3E1        size: 1302MHz        capacity: 2400MHz        width: 64 bits        clock: 100MHz        capabilities: x86-64 fpu fpu_exception wp 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 rdtscp constant_tsc arch_perfmon  pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni    pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid    sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer xsave avx f16c lahf_lm    epb tpr_shadow vnmi flexpriority ept vpid fsgsbase smep erms xsaveopt     dtherm arat pln pts cpufreq           configuration: cores=2 enabledcores=2 threads=4  Update This time I edited the sensors , htop command result in image. It's getting overheated, my laptop is getting hang cause of overheating, please watch and reply. Thanks.
33070
I recently installed Windows 8 RTM, but found a very annoying thing. My PC always powered on automatically even in midnight. Eventually I noticed that I can power on the PC by pressing keyboard or mouse, and even moving mouse.  After searched this in Google, I turned off Sleep and Hibernate in Power Options -> System Settings -> Shutdown settings, but it still did not work.  Would anyone please help me?  I don't want to suffer from the noise of PC powering on in midnight any more.
84713
I have an A10-6800K CPU and Piriform Speccy says that my CPU temp is 66 celcius in idle, the same goes for HWMonitor.  Is this normal/ideal? I have a  with a .
115543
I keep a PC running 24x7 as it handles several light (processor-wise and disk-wise) tasks and acts as a jumping point into my network from outside. I'd like to keep it as energy efficient as possible.  I've always wondered about the "Turn off harddrive after XX mins inactivity" type settings. I can imagine on Win 3.1 that this might work well for unattended PCs, but I figured that in more modern OSes there are so many background tasks running and likely touching the disk periodically that this setting is pretty ineffective.  However, I'm more concerned/interested in knowing whether it is dangerous. I can imagine that spinning down the harddrive every 20 mins just to have it get spun right back up again (and maybe worse, spun up while it is spinning down) might be bad for the drive. I've definitely seen some TCO figures from way back about lab machines used only during the day but cheaper to leave them running since the drive failures are increased with spin up/down (and they seem to occur during power on).  Any tips?
80702
Problem  I installed Ubuntu 12.04 on a Dell Inspiron 15R. As soon as I boot, the fan starts at full speed and stays constantly on. I've seen similar posts, where installing fan control apps are recommended like  i8kmon   jupiter mesa-utils   but in general, these do not allow for automatic fan speed control and one has to manually set the fan speed, while keeping track of the processor's temperature. See:   Technical specs   - Processor: Intel® Core™ i5-3337U CPU @ 1.80GHz × 4  - RAM: 6 GB  - Disk: 500 GB  - Graphics: Standard Intel drivers  - OS type: Ubuntu 12.04 (64-bit)   lm-sensors  coretemp-isa-0000 Adapter: ISA adapter Physical id 0:  +45.0°C  (high = +87.0°C, crit = +105.0°C) Core 0:         +40.0°C  (high = +87.0°C, crit = +105.0°C) Core 1:         +45.0°C  (high = +87.0°C, crit = +105.0°C)   Any hint on how to solve this ?
82236
I'm having trouble with the thinkpad_acpi module on my Thinkpad T400. While the processor temperature can vary, depending on the CPU activity, from 40 to 85 deg. Celsius, my fan speed remains almost constant, in the range of 2600-3000 rpm. I was expecting the fan to speed up as the temperature rises, but it's not happening.   Before digging deeper into why it doesn't work as one would expect, I tried to check if manually increasing the fan speed works. According to , I should be able to control the fan speed by writing level [1-7] to /proc/acpi/ibm/fan, but I get the "Invalid argument" error whatever the value.  I realize this is an obscure problem, but may be someone has an idea what might be valid arguments. Here are some of my attempts:  # cat /proc/acpi/ibm/fan status:     enabled speed:      2966 level:      auto # echo 5 &gt;/proc/acpi/ibm/fan bash: echo: write error: Invalid argument # echo 'level 5' &gt;/proc/acpi/ibm/fan bash: echo: write error: Invalid argument # echo 'enable' &gt;/proc/acpi/ibm/fan bash: echo: write error: Invalid argument # echo 'level auto' &gt;/proc/acpi/ibm/fan bash: echo: write error: Invalid argument
81730
Everest Ultimate is suddenly telling me that the CPU temperature (and core temps) for my E6850 Core 2 Duo is 72 degrees Celsius. When I stress-test the machine, the temp goes up to 91 degrees and the CPU actually throttles. System remains stable though.  For over a year now, my CPU has run very cool (40's) with a large commercial copper heatsink/fan that I bought separately.   To top it off, I removed the cover of the box and felt the cpu heatsink and it wasn't even warm.   Is there such a thing as a CPU temp sensor showing the wrong readings?  Any tips would help.  UPDATE #1  Temp is also just as high in BIOS. So that leads me to believe it's a CPU seating issue (even though I used thermal paste to seat it two years ago when I built the machine)  UPDATE #2 Well. I removed the heatsink and cleaned off the original thermal paste (which was somewhat crusty). I polished the surface, re-applied some new paste, and reseated the heat sink. After powering it up, there was no noticeable change in the temp - ideling at 74. Ran the stress test and it went up to 94 degrees before being 100% throttled. I let it sit at 94 degrees for 20 minutes straight and the computer didn't even flinch. I then immediately shut it off and opened the case and felt around. The heatsink was completely cold to the touch. Even the copper rods were cold. The area near contact with the CPU was slightly warm but not hot to touch.  Then I ran REALTEMP, which is supposedly more accurate and it told me the CPU was at 104 degrees. (LOL)  At this point, I'm thinking no doubt the cpu's sensor is wrong. Sidenote: the BIOS has the latest version so no option to flash there. Reverting hasn't been known to help from what I've read.  What angers me is the false temps force the CPU to artificially throttle from 3GHz down to 2GHz and my CPU fan is cranking at full force all the time.  Should I call intel and tell them to send me another E6850?   SOLUTION UPDATE  I switched the processor out with another one and got the same obscene temperatures with the new processor followed by a heatsink that was cool to touch. My suspicion in the heatsink was suddenly renewed. I swapped it out with the stock heatsink/fan and lo and behold the temperatures returned to the normal 35C-50C. Even though the thermal paste was visibly flattened out every time I removed it, it looks like the heatsink was still not pressing hard enough on the CPU to effectively conduct the heat. The heatsink is a Masscool 8Wa741, which screws into a standard position on a mount on the back of the MOBO. Only thing I can surmise after 2 years of use was that, over time, the heatsink pressure on the CPU gave way until the heat began to be ineffectively conducted.   Lessons learned:     Intel CPU's can run SUPER HOT (upwards of 95C) and still be stable.  Heatsink's need to be VERY firmly pressed against the CPU to conduct heat.
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I have a laptop that's running on the following:   MSI MS-1634X motherboard AMD Turion X2 TL-66 CPU ATI Mobility Radeon HD2600   It keeps overheating, especially when I do something more CPU and GPU-intensive such as games. I've tried SpeedFan and Notebook Hardware Control and neither are able to help control my fans. I also have a Targus Chillmat for my laptop which helps cool down my laptop, but it still overheats. Are there any fan controlling programs that I could use to maybe turn up the RPMs on my fans or any other ways to cool down my laptop? My laptop runs pretty hot, maybe 80c core when being used, not even intensively. The Hard drive stays cool though, close to 35c.  Any help is appreciated. Thanks!
65011
I noticed my house wasn't getting under 75°F this weekend when I had the thermostat set for 70°F. Since I'd done a lot of drywall sanding inside recently, my first idea was to replace the filthy air filter.    My first indication that the air filter wasn't the root cause was when the return didn't have enough suction to hold the air filter in place while I was replacing it. I went outside to look at the compressor unit and discovered the exposed portion of the refrigerant line running into the house was frozen, but the fan was still running. The evaporator drain line still had a steady stream of water coming out of it. After turning everything off and waiting for the line to thaw, I turned the thermostat back on. Cooler air came out of the vents, but it didn't seem to be blowing with much force, and it wasn't as cool as it should be. I went back outside and discovered the refrigerant line was already frosting up again. At this point it was already dark, so I turned everything back off and slept with the ceiling fan on. :/   Other random notes that may or may not play a factor:   The AC unit had been sitting idle the past 3 days since we had nice weather in the mid-70's last week. I mowed the lawn next to the condenser unit the day I noticed it stopped working. However, I was bagging the grass clippings, so nothing should have been blown into the unit.   Any ideas on the root cause of the icing and lower air flow? I wouldn't think the two would be connected normally. Is it something as simple as low refrigerant levels? I plan on going to look more closely at it after work today. What are some other things I should pay attention to?  UPDATE: I checked the system after work today and decided to give it one more chance after I couldn't find anything wrong with it. After a few hours, it had brought the inside temperature down from 80°F to 75°F. I periodically checked the refrigerant line for freezing, but it never got much colder than 60ish degrees.  I think the root cause was the air filter, and that I didn't allow enough time for the line to thaw last night.  UPDATE 2: Maybe I drew conclusions too soon - I just checked the refrigerant line and discovered frost on it again. The inside temperature was at 72°F while the outside was at 66°F. I think pumping warm air to a cooler outside temperature may have contributed to the icing, but I'm not completely sure. (And if you think I'm crazy for running the AC when I could just open the window, you'd think twice too if you saw how many bugs swarm my porch light and windows every night. Dozens of them somehow find their way past the screens if I open the windows.) I plan on running it again tomorrow during the day and monitoring the refrigerant line temperature every few hours. If it freezes up again, I think I'm going to cave and call a repair guy.  UPDATE 3:  I totally forgot to follow up on this. It froze again, so I called an HVAC repair guy. He checked the system, added refrigerant, and problem solved. I think the bill came out somewhere around $150 for the service call fee and refrigerant costs.
86965
First Question for me.  I have benefited from other answers here but have not fully resolved my problem.  Here's my problem...  The LM311 Comparator output does not drive the N channel MOSFET fully on.  The LM311 has a 110mv ref voltage on the inverting input. The non-inverting input is driven by an opto-isolator output. The Opto-isolator is driven by 1 of 4, AC 60Hz voltages.  &lt;1VAC, 9VAC, 55VAC and 115VAC.  The goal of the design is to have the FET fully turn on the 12VDC fan when there is appreciable AC voltage.  So fan fully On for the 9, 55, and 115VAC voltages.  It seems it should work because I measure voltages on the non inverting input of 1.6, 2.2 and 3VDC respectively for the 3 appreciable AC voltages.  And my ref voltage on the inverting input is 110mv.  So it "almost" works because the fan is off at the &lt;1VAC, but not fully "On" for the other AC voltages.  I believe this is because Vgs is 167mv, 6.1V, 7.7V and 9.9 Volts for the 4 AC voltages listed above.  And the fan is only getting 7, 8 and 10VDC instead of a desired 12VDC. Would really like to be able to fully turn this FET all the way on.  So Close!  Any input or guidance is appreciated.  Ps-Things I think I've done right? Flyback diode across the fan. Putting N channel FET to switch to ground on low side of fan. LM311 has Open collector output using correctly?  PSS-I realize that the pinouts for the LM311 are not right in my schematic.  I have them right in my protoboard circuit.  Its a single device.  Pin 2 is noninveritng and pin 3 in Inverting  Thanks Again.      The suggested duplicate question and answer doesn't help for the following reasons: Both diagram and schematic are"No file found" making it pretty difficult to follow the answers. I am not using any positive feedback in my circuit as I don't think I need one. I have a simple pull up resistor to my 12V supply, not a voltage divider to the power supply as is mentioned in the answer. Thanks.  Just for the record I wanted to post a more accurate schematic and thanks for the response on using a Cap to hold up the opto isolator output. I actually have a full wave input to the phototransistor but I'm sure the cap will help anyway. To answer the last question, the Pin 7 comparator output has a pullup resistor to 12v. The issue is still that Vgs is only 10v when the comparator has 3v on pin 2 and 110mv on pin 3. I would have expected the LM311 output to go much closer to 12v (Vcc) with those inputs. The intent is for the FET to go completely on for pin 2 voltage > pin 3.
94348
What are the pros and cons of controlling (lowering, or even overclocking) the CPU frequency on a laptop? How can I do it in Ubuntu and will it increase my battery life (as I never play games and stuff)  And do fan speed and CPU frequency have any correlation?
43420
My computer's motherboard uses all four pin fan connectors with no support for speed controlling the older three pin fan connector. The problem is, all the PC fans that I have use a three pin connector. As fan as I know there are no premade solutions available, so I was thinking of building an adapter that sits in an unused drive bay.   I can't seem to find much information on how the four pin fan connecter works. Apparently, it looks something like this:   12 V 0V Tachometer PWM   The three pin header is numbered similarly:   Vcc 0V Tachometer   Could I simply use a logic level MOSFET to do the following?
88531
I have an old NEC Express5800/T120d server. It was operating under Windows at reasonable fan speed. I now want to use it at home with Debian, but the fans are always at full speed.  The power supply fan is at full speed. With Windows it was quiet. There is a data cable between the motherboard and the power supply. The 1 x rear + 3 x front fans are also at full speed. With Windows they were relatively quiet. Nothing into the BIOS and IPMI console about fan control. Only the current speed is displayed.  &nbsp;  I installed lm-sensors and fancontrol without success:  $ sensors-detect ... with YES answer everywhere ... Driver "coretemp":   * Chip `Intel digital thermal sensor' (confidence: 9) Driver "to-be-written":    * ISA bus, address 0xca2     Chip `IPMI BMC KCS' (confidence: 8)   So sensors-detect only see unusable devices.  &nbsp;  Nothing more with pwmconfig:  $ pwmconfig /usr/sbin/pwmconfig: There are no pwm-capable sensor modules installed   &nbsp;  I installed freeipmi / freeipmi-tools:  $ ipmi-sensors ... 29 | PSU1 Temp        | Temperature                         | 24.00      | C           | 'OK' ... 32 | FAN1             | Fan                                 | 7936.51    | RPM         | 'OK' 33 | FAN2             | Fan                                 | 933.71     | RPM         | 'At or Above (&gt;=) Upper Non-Critical Threshold' 34 | FAN3             | Fan                                 | 933.71     | RPM         | 'At or Above (&gt;=) Upper Non-Critical Threshold' 35 | FAN4             | Fan                                 | N/A        | RPM         | N/A 36 | AIRVOL1          | OEM Reserved                        | 1.31       | unspecified | 'OK' 37 | AIRVOL2          | OEM Reserved                        | 1.31       | unspecified | 'OK' ...   But I don't know how to do more than just looking at the fan speed. Most IPMI programs included into freeipmi asks for a hostname and user/password but I can not manage to understand what to enter.  &nbsp;  I also tried upmiutil and ipmitool packages without better success. They all give me the fan status but I do not understand how to configure them.