Nevermind, upon further digging I found https://lore.kernel.org/all/20240713074733.77334-2-luke@xxxxxxxxxx/, which wasn't pulled into my downstream kernel yet and verified that it does work for me. Thanks, Mitchell Augustin ---- On Sun, 17 Nov 2024 10:11:52 -0800 Mitchell Augustin wrote --- > Hello, > > On my Zephyrus G15 (GA503RM-G15.R93060), > my keyboard brightness controls do not work. I believe I have traced > this down to being a kernel issue, based on the fact that my Gnome > control center slider and `asusctl -k` do result in > `/sys/class/leds/asus::kbd_backlight/brightness` being updated, but the > changed value of `/sys/class/leds/asus::kbd_backlight/brightness` is not > reflective of the actual brightness of my keyboard, which always > remains unchanged. (I can also confirm that other keyboard/fan control > features do work, such as the keyboard profile switcher, custom fan > curves, etc. - so it just seems to be the brightness that is broken.) > > If this is likely just a case where I would need to poke around my hardware to > find the correct values to write for brightness control to work on my > specific SKU, I would be happy to do that and contribute it back here, but I > will need some guidance on where to look for that info. > > Let me know if that would be helpful, or if there's any other info I can provide to help fix this bug. > > Thanks, > > Mitchell Augustin >