I had previously changed the GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor" in order to change my screen brightness with the keyboard buttons.

Now I want to use THERMALD and Intel P-STATE to prevent my laptop from overheating. But this too suggests a change of the GRUB_CMDLINE_LINUX_DEFAULT line in the /etc/default/grub.

Is there any way to have both acpi_backlight=vendor and intel_pstate=enable?

I am using Ubuntu 14.04 LTS.


Yes, you can simply edit that line this way:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor intel_pstate=enable"

And run:

sudo update-grub

Then reboot:

sudo reboot
  • Thanks! I was scared to change it as I read that if I do some mistake, my system won't boot. – Chinmaya K R May 1 '14 at 16:47

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