Screen Brightness not adjustable for Acer Aspire S3

Solution 1:

Hi I've had the same computer since two days ago. To be able to set the brightness, I've modified the line:

GRUB_CMDLINE_LINUX=""

to this:

GRUB_CMDLINE_LINUX="quiet splash acpi_osi=Linux acpi_backlight=vendor"

in the file /etc/default/grub, then:

sudo update-grub

Now I can set the brightness with the hotkeys, you can go so low that the screen is completely black... I just have a problem when the screen goes to sleep; I can't get it back. (I have to close the screen to put the computer in sleep and reopen it...)

Have you found a way to get the touchpad scrolling functional? And did you find the solution to set the fan speed?

Except for those little thinks it's a great thin, light and responsive laptop. I really hope those problems will be fixed soon.

Solution 2:

I too had this brightness problem. But it was fixed with the code

GRUB_CMDLINE_LINUX="quiet splash pcie_aspm=force i915.i915_enable_rc6=1 acpi_osi=Linux acpi_backlight=vendor"

My laptop is Acer Aspire 4752Z (Ubuntu 11.10).