I was given a HP Probook 4720s as a work laptop, over the last 2 years I've predominantly used Ubuntu as my OS for work and home, but recently have needed to use Windows 7 as it controls the fans correctly.
I am now at the point where I want to try and resolve this issue. I haven't asked a question before for help as I can nearly always fulfill my queries with a search engine.
So here are the outputs from lspci/lsusb/lsmod not sure what is required so it's a starting point and also a link to the hardware from hardinfo.
It has been suggested to me that Ubuntu one sync daemon could have been the issue but I've tried quitting this to no avail, I have also tried using the CPU Demand Frequency to it's lowest setting 933mhz but the fans still keep going.
/proc/acpi/fan is totally empty which I am guessing is that the fan hasn't been detected.
The sensors program detects temperatures but does not detect the speed of the fans.
andy@lappy:/proc/acpi/fan$ sensors Acpitz-virtual-0 Adapter: Virtual device Temp1: +56.0°C (crit = +127.0°C) Temp2: +0.0°C (crit = +128.0°C) Temp3: +0.0°C (crit = +128.0°C) Temp4: +38.0°C (crit = +127.0°C) Temp5: +0.0°C (crit = +128.0°C) Temp6: +27.0°C (crit = +128.0°C) Temp7: +64.0°C (crit = +128.0°C) Temp8: +46.0°C (crit = +128.0°C) Temp9: +51.0°C (crit = +128.0°C) Temp10: +59.0°C (crit = +128.0°C) andy@lappy:/proc/acpi/fan$ acpitool -f Fan: not available
I'm guessing it's an ACPI issue but from lack of good results / Google foo I cannot find a solution.
I have tried a few fixes from the ubuntu forums which I am failing to find links for at the moment but none of them have been useful yet.
Just to add this happened from a clean install so no unruly processes as mentioned in other posts.
Open to try just about anything, I will reinstall if I need to.