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#1 2016-03-29 19:40:11

kjozsa
Member
Registered: 2008-06-05
Posts: 136

Backlight controls only work *after* suspend

HPZBook Studio G3 laptop running an uptodate arch linux. Screen backlight controls in Gnome3 appearently do nothing, the /sys/class/backlight/acpi_video0/* interface has no visible change either (though it shows the backlight set via Gnome controls). As discovered accidentally, after suspending my laptop and resuming it one time after a fresh boot, everything backlight-related works perfectly.

How could I reach the desired state without an initial suspend? What could be different after resuming the machine?

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#2 2016-04-01 19:42:53

bbbart
Member
From: Belgium
Registered: 2016-03-14
Posts: 16
Website

Re: Backlight controls only work *after* suspend

strange, you seem to have the opposite problem as me: https://bbs.archlinux.org/viewtopic.php?id=210204 :-)

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