I want to be able to control the two dual (orange/white) LEDs on my HP Probook 4540s laptop. However, I don't see them in the list:
/sys/class/leds/hp::hddprotect /sys/class/leds/input3::capslock /sys/class/leds/input3::numlock /sys/class/leds/input3::scrolllock /sys/class/leds/mmc0:: /sys/class/leds/rt2800pci-phy0::assoc /sys/class/leds/rt2800pci-phy0::quality /sys/class/leds/rt2800pci-phy0::radio
The last three items are obviously referring to the Ralink WiFi/BT card, but changing the brightness for any of them doesn't affect the LEDs (works fine for others).
My question is where do those entries in /sys/ come from? Is it possible to add my own? Any (HP specific?) system drivers that enable this?
The only way I've seen the LED change colors is when activating both Wifi and Bluetooth, but that only worked on a specific set of drivers and/or under specific ACPI setting (can't remember which, but it caused some of the key features not to work, so I gave up on using Bluetooth at all).
Not sure if it has to do something with the generic drivers I'm using:
GENERAL.PRODUCT: RT3290 Wireless 802.11n 1T/1R PCIe (Ralink RT3290LE 802.11bgn 1x1 Wi-Fi and Bluetooth 4.0 Combo Adapter) GENERAL.DRIVER: rt2800pci