Error at step 4: headers not found

[bphd]

$ sudo dkms build -m asus-wmi -v 1.0
Error! echo
Your kernel headers for kernel $KERNEL cannot be found at
/usr/lib/modules/$KERNEL/build or /usr/lib/modules/$KERNEL/source.
You can use the --kernelsourcedir option to tell DKMS where it's located.
$ ls /usr/lib/modules/$KERNEL/source
ls: cannot access '/usr/lib/modules/$KERNEL/source': No such file or directory
$ du -h /usr/lib/modules/$KERNEL/build/*
58M     /usr/lib/modules/$KERNEL/build/vmlinux

[anlakii]

Make sure you have appropriate kernel headers installed, which usually come in a separate package. For example, on Arch it's installed with the linux-headers package.

[bphd]

Theres no linux-headers but I installed linux-lts-headers because I run on an LTS kernel. After rebooting the command said that the module was already builded and installed (mysterious, considering that even the adding operation behaved the same way). But I don't have anything new under leds/ so I have nothing to control the backlight for now

[anlakii]

You probably need to remove the kernel module again and repeat the installation procedure, as per the "Removing or reinstalling" README section. (Check https://github.com/Plippo/asus-wmi-screenpad#removing-or-reinstalling)

Once the kernel module is loaded and started you should also probably see some logs in the dmesg output, so I suggest you check the output of dmesg | grep asus_wmi.

You can also check if there's anything in /sys/devices/platform/asus-nb-wmi.

[bphd]

$ ls /sys/devices/platform/asus-nb-wmi/
cpufv  driver  driver_override  hwmon  input  leds  modalias  power  rfkill  subsystem  uevent

but

$ ls /sys/class/leds/
asus::kbd_backlight  input3::capslock  input3::numlock  input3::scrolllock  phy0-led

and

$ sudo dmesg | grep asus_wmi
[    9.000668] asus_wmi: ASUS WMI generic driver loaded
[    9.004545] asus_wmi: Initialization: 0x1
[    9.004687] asus_wmi: BIOS WMI version: 9.0
[    9.004782] asus_wmi: SFUN value: 0x21

(I reinstalled without any errors)

[Plippo]

You have to install the correct headers for your kernel. Most distributions provide a meta package for that. If you reinstalled without errors but don't see the device, than the device probably isn't recognized. What model of the ZenBook Duo do you have?

[bphd]

Not a ZenBook Duo