I have a problem with changing the screen brightness in Manjaro. Moving the slider and the Fn keys do not work. This is only possible by editing the file /sys/class/backlight/intel_backlight/brightness.
How do I make a menu slider edit this file?
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Hello! have you tried to add a kernel parameter? After a couple of months and almost giving up I read this post:
I have a Dell laptop with hybrid graphics and the kernel parameter that worked fo me was:
GRUB_CMDLINE_LINUX_DEFAULT="acpi_backlight=none"
Actually my /etc/default/grub file has the parameters:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash apparmor=1 security=apparmor acpi_backlight=none udev.log_priority=3"
GRUB_CMDLINE_LINUX="reboot=acpi"