Public bug reported:
Normally on Ubuntu (and other OS e.g. Windows, OSX) the brightness keys
on the keyboard adjust the backlight of the display so that you can
reduce battery usage.
On Lubuntu/LXQT 19.04 they appear to adjust the brightness or contrast
of the image instead, and the backlight is not adjusted.
This can be verified by opening the Brightness control panel which shows
that the backlight slider (top) is not adjusted, instead the brightness
'wheel' is adjusted.
Description: Ubuntu 19.04
Release: 19.04
lxqt:
Installed: (none)
Candidate: 29
Version table:
29 500
500 http://archive.ubuntu.com/ubuntu disco/universe amd64 Packages
** Affects: lxqt-powermanagement (Ubuntu)
Importance: Undecided
Status: New
** Tags: lubuntu lxqt
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https://bugs.launchpad.net/bugs/1829641
Title:
brightness keys on laptop don't dim the backlight
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