I switched to Ubuntu from Windows roughly a week ago. So I'm pretty new to Ubuntu. I'm experiencing overheating problem with my laptop and sometimes it's turned off suddenly. I have a Toshiba L655 laptop with Ubuntu 14.04 LTS - 64bit. I installed lm-sensors package and measured the temperature. It is continuously increasing when I'm working (just web browsing ) I googled my problem and found few solutions given in some forums. To solve this first I installed proprietary video driver from "Software & Updates" -> "Additional Drivers" tab.(VGA = AMD/ATI - Mobility Radeon HD 5430/5450/5470) Yet it didn't make any improvement. Then I edited /etc/default/grub and set
GRUB_CMDLINE_LINUX="acpi.power_nocheck=1"
and saved (found from a forum). After that I executed this command
sudo update-grub
and rebooted. Still no sign of an improvement. Then I installed another package
sudo add-apt-repository ppa:linrunner/tlp
sudo apt-get update
sudo apt-get install tlp tlp-rdw
sudo tlp start
Nothing changed.
May be the problem is with my cooling fan , when I was using Windows the cooling fan functioned frequently and I didn't have any issue like this. Now with Ubuntu 14.04 cooling fan is almost not operating. Very rarely it comes and goes and at that time I observe the temperature goes down. I really appreciate if anyone can help me to solve this problem.