Hi
I’m experiencing an issue with my Asus TUF FX 505DT laptop where the keyboard backlight does not activate when I use the Fn+Up Arrow key combination. The preconfigured keybindings on my laptop are functioning correctly, but nothing when i do the keyboard backlight brightness adjustment.
Here’s some additional information about my system:
$ uname -a
Linux 6.7.6-200.fc39.x86_64 #1 SMP PREEMPT_DYNAMIC Fri Feb 23 18:27:29 UTC 2024 x86_64 GNU/Linux
$ neofetch
.',;::::;,'.
.';:cccccccccccc:;,. ------------
.;cccccccccccccccccccccc;. OS: Fedora Linux 39 (Workstation Edition) x86_64
.:cccccccccccccccccccccccccc:. Host: TUF Gaming FX505DT_FX505DT 1.0
.;ccccccccccccc;.:dddl:.;ccccccc;. Kernel: 6.7.6-200.fc39.x86_64
.:ccccccccccccc;OWMKOOXMWd;ccccccc:. Uptime: 36 mins
.:ccccccccccccc;KMMc;cc;xMMc:ccccccc:. Packages: 2481 (rpm), 22 (flatpak)
,cccccccccccccc;MMM.;cc;;WW::cccccccc, Shell: bash 5.2.26
:cccccccccccccc;MMM.;cccccccccccccccc: Resolution: 1920x1080
:ccccccc;oxOOOo;MMM0OOk.;cccccccccccc: DE: GNOME 45.4
cccccc:0MMKxdd:;MMMkddc.;cccccccccccc; WM: Mutter
ccccc:XM0';cccc;MMM.;cccccccccccccccc' WM Theme: Adwaita
ccccc;MMo;ccccc;MMW.;ccccccccccccccc; Theme: Adwaita [GTK2/3]
ccccc;0MNc.ccc.xMMd:ccccccccccccccc; Icons: Adwaita [GTK2/3]
cccccc;dNMWXXXWM0::cccccccccccccc:, Terminal: gnome-terminal
cccccccc;.:odl:.;cccccccccccccc:,. CPU: AMD Ryzen 7 3750H with Radeon Vega Mobile Gfx (8) @2.300GHz
:cccccccccccccccccccccccccccc:'. GPU: NVIDIA GeForce GTX 1650 Mobile / Max-Q
.:cccccccccccccccccccccc:;,.. GPU: AMD ATI Radeon Vega Series / Radeon Vega Mobile Series
'::cccccccccccccc::;,.
$ pwd
/sys/class/leds
$ ls -l
total 0
lrwxrwxrwx. 1 root root 0 Mar 3 12:00 asus::kbd_backlight -> ../../devices/platform/asus-nb-wmi/leds/asus::kbd_backlight
lrwxrwxrwx. 1 root root 0 Mar 3 12:00 asus-wireless::airplane -> ../../devices/LNXSYSTM:00/LNXSYBUS:00/ATK4002:00/leds/asus-wireless::airplane
lrwxrwxrwx. 1 root root 0 Mar 3 2024 input4::capslock -> ../../devices/platform/i8042/serio0/input/input4/input4::capslock
lrwxrwxrwx. 1 root root 0 Mar 3 2024 input4::numlock -> ../../devices/platform/i8042/serio0/input/input4/input4::numlock
lrwxrwxrwx. 1 root root 0 Mar 3 2024 input4::scrolllock -> ../../devices/platform/i8042/serio0/input/input4/input4::scrolllock
$ pwd
/sys/class/leds/asus::kbd_backlight
$ ls -l
total 0
-rw-r--r--. 1 root root 4096 Mar 3 12:00 brightness
-r--r--r--. 1 root root 4096 Mar 3 12:00 brightness_hw_changed
lrwxrwxrwx. 1 root root 0 Mar 3 12:41 device -> ../../../asus-nb-wmi
--w-------. 1 root root 4096 Mar 3 12:41 kbd_rgb_mode
-r--r--r--. 1 root root 4096 Mar 3 12:41 kbd_rgb_mode_index
--w-------. 1 root root 4096 Mar 3 12:41 kbd_rgb_state
-r--r--r--. 1 root root 4096 Mar 3 12:41 kbd_rgb_state_index
-r--r--r--. 1 root root 4096 Mar 3 12:00 max_brightness
drwxr-xr-x. 2 root root 0 Mar 3 12:41 power
lrwxrwxrwx. 1 root root 0 Mar 3 12:00 subsystem -> ../../../../../class/leds
-rw-r--r--. 1 root root 0 Mar 3 12:41 trigger
-rw-r--r--. 1 root root 4096 Mar 3 12:00 uevent
I’ve checked the /sys/class/leds directory and found the asus::kbd_backlight symlink, which suggests that the system recognizes the keyboard backlight as a controllable LED. However, adjusting the brightness through the Fn+Up Arrow key combination does not seem to affect the backlight’s state.
Could you provide any guidance or solutions to this issue?