How to troubleshoot fan speed in Linux Mint 17 Cinnamon?

I installed Linux Mint 17 Cinnamon over Windows 8 recently on an Acer Aspire E1-570. http://www.acer.com.au/ac/en/AU/content/model/NX.MEPSA.004 Everything seems to be working fine, however I notice that my fan seems to be on at high speed a lot of the time. Can someone please tell me definitive troubleshooting steps that are relevant to this distro. Also if there are commands that I can run to get the relevant system information required to troubleshoot the issue it would be great to know these too. **Edit** In case it is relevant, the screen brightness applet control wasn't working so I followed steps below - perhaps that altered something? me@computer ~ $ ls /sys/class/backlight/ acpi_video0 intel_backlight sudo touch /usr/share/X11/xorg.conf.d/20-intel.conf sudo gedit /usr/share/X11/xorg.conf.d/20-intel.conf and then added this to the file: Section "Device" Identifier "card0" Driver "intel" Option "Backlight" "intel_backlight" BusID "PCI:0:2:0"EndSection http://itsfoss.com/fix-brightness-ubuntu-1310/ Sensors also seems to be mentioned in other posts so I typed it into the command and this was the output: me@computer ~ $ sensors coretemp-isa-0000 Adapter: ISA adapter Physical id 0: +44.0°C (high = +87.0°C, crit = +105.0°C) Core 0: +44.0°C (high = +87.0°C, crit = +105.0°C) Core 1: +44.0°C (high = +87.0°C, crit = +105.0°C) **More System Information** me@computer ~ $ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor ondemand me@computer ~ $ inxi -Fxz System: Host: computer Kernel: 3.13.0-24-generic x86_64 (64 bit, gcc: 4.8.2) Right-click > "Open image in new tab" to see image at full size.