This question already has an answer here:
I'm having quite the time getting my keyboard backlights to work on my ROG Zephyrus laptop. Some of the F# keys do not respond their dedicated function when holding the Fn key. Specifically the key combinations for adjusting keyboard backlight for my model FN+F3 to dim and FN+F4 to brighten.
Specifically, I have followed the many suggestions that were recommended from this link with no luck. I have edited the grub file as below and after updating grub I've done a reboot.
sudo vim /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=" sudo update-grub reboot
I've also tried:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi= acpi_backlight=intel sudo update-grub reboot
I've also defined several different options all at once. I've tried a few different combinations as well.
I'm not for sure which one of these it was but caused my computer to lock up on a reboot with two lines indicating a namespace error.
Another setting basically removed all functionality from the keyboard and I had to re image in order to retain basic keyboard functionality back.Some of these additional options that I'm referring to are in the link above but I'm including them below for completeness.
GRUB_CMDLINE_LINUX="acpi_osi=Linux" GRUB_CMDLINE_LINUX="acpi_backlight=vendor" GRUB_CMDLINE_LINUX="acpi_osi=linux acpi_backlight=vendor" GRUB_CMDLINE_LINUX="acpi_osi_Linux"
I've installed this "brightness-controller" that was suggested on another site but that doesn't resolve anything.
I'm running the 375.82 Nvidia graphics drivers without any issues.
The person in the link above that was asking the question listed some specs from their system using a certain command lshw -C display.
So I'm going to do the same if it will provide any useful information. For specs related to my computer you can refer to this link
Quick update 08/16/17
*-display description: VGA compatible controller product: NVIDIA Corporation vendor: NVIDIA Corporation physical id: 0 bus info: pci@0000:01:00.0 version: a1 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vga_controller bus_master cap_list rom configuration: driver=nouveau latency=0 resources: irq:127 memory:db000000-dbffffff memory:b0000000-bfffffff memory:c0000000-c1ffffff ioport:e000(size=128) memory:c0000-dffff
I emailed the driver support team from Asus and they informed me that they are using the Atk drivers to control the keyboard brightness.
So I did some searching around and came across an article here that mentions to run the following command.
echo 3 > /sys/class/leds/asus\:\:kbd_backlight/brightness;exit
So my first question is why I can't execute this command and if I'm doing something wrong what the correct command would be.
From here I looked at what the contents of that location were:
I then tried a few different commands hoping for a different outcome but the command I tried still failed even with
What am I doing wrong here? Can someone give me some commands to try out on this directory to see if I can change the brightness.