In the system settings for ubuntu 16.04 I can't change the screen brightness on my Dell Inspiron N7010, the scroll bar moves but nothing actually changes. Additionally I can't change the brightness through the terminal through any commands I have found on google. Can anyone help me or provide suggestion? It drains my battery extremely fast to have it on 100% brightness all the time. Thank you!
$ head /sys/class/backlight/*/brightness
==> /sys/class/backlight/dell_backlight/actual_brightness <== 6 ==> /sys/class/backlight/dell_backlight/brightness <== 6 ==> /sys/class/backlight/dell_backlight/max_brightness <== 15 ==> /sys/class/backlight/intel_backlight/actual_brightness <== 617 ==> /sys/class/backlight/intel_backlight/brightness <== 617 ==> /sys/class/backlight/intel_backlight/max_brightness <== 4882
$ lspci -k | grep -iEA3 '3D|VGA'
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 18) Subsystem: Dell Core Processor Integrated Graphics Controller Kernel driver in use: i915 Kernel modules: i915