I'm slowly working through all the defects on a plain-vanilla Ubuntu 16.10 install on this machine but this one has me stumped. My screen brightness hotkeys, Fn-F5 and Fn-F6, worked fine on Ubuntu 16.04 but now that I've done a clean install of Ubuntu 16.10 they don't work.
Here's what I know:
- screen brightness is addressable by the kernel (
/sys/class/backlight/intel_backlight/
), desktop tools such as Redshift and adjusting brightness with the slider in the config panel works fine, as does command-line adjusting:echo 1000 | sudo tee /sys/class/backlight/intel_backlight/brightness
- I can see them in
evtest
in the listing for the device "Asus WMI Hotkeys" ("Event code 224 (KEY_BRIGHTNESSDOWN)" and "Event code 225 (KEY_BRIGHTNESSUP)"), however pressing the keys doesn't generate key events. - The keys do work in the BIOS and in GRUB, but once the kernel starts the key events don't seem to be seen.
- I've tried kernel params "acpi_osi=", "acpi_osi=Linux", "acpi_osi=Windows" with no luck (although that definitely disabled some stuff, according to
evtest
)
I know this worked under Linux because it worked under Ubuntu 16.04. Any suggestions for my next debugging step?