I am having the same issue here.
My laptop is an intel i5 which used to run perfectly well some games [i used to use elementary os].
After i installed manjaro, it gets 1) very hot (temperature reaching 100c when running a heavy browser game), 2) very slow, and 3)CPU at high capacity.
I have read so much about all kinds of possible solutions dealing with cooling fans on my laptop (supposedly thats the issue? [specially because heat+i cant hear the cooling fan work]), but absolutely nothing works.
I have tried changing kernels (installing it, on boot screen changing the one Im going to use, etc.), didnt work.
I have tried TLP, POWERTOP, LMSENSORS, PWMCPONFIG, everything.
At PWMCONFIG, i reach a point where it says: “/usr/sbin/pwmconfig: There are no pwm-capable sensor modules installed”. I have tried a possible solution (" fancontrol-under-ubuntu-14-04-resolving-usrsbinpwmconfig-there-are-no-pwm-capable-sensor-modules-installed "), didnt work to.
MY elementary os (in the another partition) got slow as well after this issue arrived.
I have tried to fix it in elementary os, but got nothing new too.
Is it due to manjaro not ‘‘geting my cooler to work’’?
COuld it be a coincidental hardware issue? (for instance, laptop fan suddenly not working…?) PS: I cant see if it works, I dont know how to open a laptop and I think this is not a likely scenario.