This bug was fixed in the package unity-settings-daemon - 15.04.1+18.04.20180413-0ubuntu2
--------------- unity-settings-daemon (15.04.1+18.04.20180413-0ubuntu2) cosmic; urgency=medium
[ Kai-Heng Feng ] * power: Choose correct backlight device on laptops with hybrid graphics (LP: #1683445) Backported from gnome-settings-daemon commit ed7c2744
-- Sebastien Bacher <email address hidden> Tue, 03 Jul 2018 11:27:01 +0200
This bug was fixed in the package unity-settings- daemon - 15.04.1+ 18.04.20180413- 0ubuntu2
--------------- daemon (15.04. 1+18.04. 20180413- 0ubuntu2) cosmic; urgency=medium
unity-settings-
[ Kai-Heng Feng ] daemon commit ed7c2744
* power: Choose correct backlight device on laptops with hybrid graphics
(LP: #1683445)
Backported from gnome-settings-
-- Sebastien Bacher <email address hidden> Tue, 03 Jul 2018 11:27:01 +0200