Hi everybody, I update to Slackware 14.1 RC1 a few days ago (and to RC2 today) using slackpkg and since then there is an issue that i can't solve.
I use KDE and my energy settings do not apply, I mean the brightness of my laptop's screen (an Asus X401A) doesn't change from 100% under any condition (plugged in, low battery, etc).
It doesn't bothered me until now because I was using Windows the most of the time, but now I'm using Slackware more time at day an my eyes are burning.
I use grub and tried to edit the file /etc/default/grub to:
GRUB_CMDLINE_LINUX_DEFAULT="quiet acpi_osi=Linux acpi_backlight=vendor resume=/dev/sda9"
And then run:
grub-mkconfig -o /boot/grub/grub.cfg
But still not changing the brightness. Also my user is in the "power" group (I read in a thread that was a solution).
BTW: the Fn keys (Fn + F5 for brightness down and Fn + F6 for up) does not have any effect in the brightness.
Thanks in advance.