I checked this post on AskUbuntu, but like the OP my BIOS does not have a setting for 'smart fan'. My BIOS though has something similar called 'Thermal Performance' wherein it's already set to maximum performance.
But using Hardware Sensors Indicator my fan speed barely reaches 3000 RPM (it's usually stuck around 2600 to 2700 RPM) compared to the indicated RPM of my laptop which is 5400 RPM.
There is a fan control setup for 10.04 specifically for Thinkpad here but I don't want to risk it since it's meant for a rather outdated distro already.
Is there a way change the fan speed if I can't access it through BIOS?
I'm using ThinkPad R61i 12.04 64-bit, 160 GB HDD, Intel T5870, 4 GB RAM.