Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

I have an Acer Aspire S3-391 ultrabook. It's Sandy Bridge i3-2377M CPU with appropriate integrated graphics. 320GB hard drive with 20GB cache SSD. I have Windows installed on the hard drive and Ubuntu 13.04 installed on the SSD.

Now, the problem I am having is exactly as described in the title. When the brightness under /sys/class/backlight/acpi_video0/brightness is set at 0, the backlight turns off. The screen is still powered and under camera flash, it's visible - i.e. the system is still working.

This is mostly a problem because the OS defaults to the lowest brightness on boot, leaving me to blindly type my password in and later adjust the backlight. Not horrible, I guess, but annoying enough to want to fix it.

Things I have tried: -Installing Intel drivers. They worked, but the backlight doesn't respond to Fn keys anymore and to get any backlight whatsoever I have to boot Ubuntu normally from recovery mode. Any tips on uninstalling this? Otherwise I was just going to reinstall Ubuntu and start at the original issue.

-Using xbacklight. It does modify the backlight, as expected, but I can't set the minimum above 0.

-Modifying the brightness setting under /sys/class/backlight/acpi_video0. This is the correct path - the backlight attribute changes with brightness modifications. When doing a ls here, there seems to be a max brightness attribute, but no minimum.

So basically, what I need to know: -How to uninstall the Intel drivers, i.e. replace them with the Ubuntu default for HD3000 integrated graphics (is this the noveau I keep hearing about?) -How to restrict the system from entering a brightness level of 0.

Thanks in advance!

share|improve this question

Your Answer

 
discard

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

Browse other questions tagged or ask your own question.