Thanks for reporting a bug! Would you mind try to follow instructions in
here
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2161309/comments/10
and let me know if you get the same behavior?
** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Changed in: linux (Ubuntu)
Status: New => Confirmed
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Krystian Kaniewski (kkaniewski)
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https://bugs.launchpad.net/bugs/2162937
Title:
Backlight brightness cannot be changed from OS on Dell Inspiron 5480
(WQBC WMI firmware bug)
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