Sign up ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free.

I have installed Ubuntu 11.10 on my HP dv6 and so far the only problem i've had is that i can't turn down the screen brightness. I use the "hot key" the "short cut keys" I go to settings and make the slider all the way down to dim and screen remains at the brightest me a real bad battery life. Also, I'm accustomed to using low screen settings for reading/writing documents, emails, etc. I've tried using programs such as f.lux and Redshift but these attempts have been without success. I seem to find many others with the same problems. Anyone have any ideas?

share|improve this question

1 Answer 1

You can add to grub config an acpi command, on the file /etc/default/grub, modify the following lines adding "acpi_backlight=vendor" :

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.