Problem: Backlight function keys don't work in KDE, but brightness can be adjusted via "Display Brightness" GUI located in lower right power management icon.
Specs:
- OS: RHEL 7
- Window manager: KDE
- Graphics card: NVIDIA Quadro M1000M
- Laptop: HP ZBook Studio G3
Solutions attempted and failed:
- Appending each of the following to grub line: acpi_backlight=vendor acpi_backlight=video acpi_backlight=native acpi_backlight= acpi_backlight=none
GRUB_CMDLINE_LINUX_DEFAULT="acpi_osi="
does not make the function buttons work and also has a side effect of not allowing me to change the brightness from the GUI or with changing the value in/sys/class/backlight/
. Major fail