Public bug reported:
I tried running Ubuntu 20.04 (ISO downloaded on March 10th) on a Dell
XPS 15 7590 with the 4k LED display (*not* OLED). The screen backlight
control keys seem to be registered but the brightness remain unchanged.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: Incomplete
** Tags: focal
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https://bugs.launchpad.net/bugs/1866994
Title:
Screen backlight control not working on Dell XPS 15 7590
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