Same issue on Dell E7440 with Wily kernel (in my case the HWE-kernel for Ubuntu 14.04). Keyboard backlight user control is not respected, and it turns on at various conditions, including boot and screen wake up from sleep.
Same issue on Dell E7440 with Wily kernel (in my case the HWE-kernel for Ubuntu 14.04). Keyboard backlight user control is not respected, and it turns on at various conditions, including boot and screen wake up from sleep.