laptop is overheating after installing arch linux

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https://bbs.archlinux.org – Pres wrote:Is you fan running properly? What model is your laptop?You would be editing the kernel line in /boot/grub/menu.lst instead of /etc/default/grub.How can I check if fan is working properly?(I installed lmsensors and it gives no output for fan speed)it gives this outputacpitz-virtual-0 Adapter: Virtual device temp1: +67.5°C (crit = +99.0°C) nouveau-pci-0100 Adapter: PCI adapter temp1: +63.0°C (high = +100.0°C, crit = +110.0°C)The 2nd step given in that website is to find a line which contains GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"there is no such lin (HowTos)