I'm running Ubuntu 12.04.3 LTS (info from cat /etc/issue/
) on an Asus X401A
Kernel is: 3.8.0-31-generic
I've tried changing the /etc/default/grub
file with the following:
GRUB_CMDLINE_LINUX="acpi_backlight=vendor
and
GRUB_CMDLINE_LINUX"acpi_osi=linux
With no luck.
Any other ideas? I really want it fixing. Thank you in advance.
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
not with those you have mentioned. Try it once and reply what happens..