https://bugs.kde.org/show_bug.cgi?id=447475
Bug ID: 447475
Summary: lowering brightness to 0 on oled irreversibly turns
off screen
Product: Powerdevil
Version: 5.23.4
Platform: Manjaro
OS: Linux
Status: REPORTED
Severity: grave
Priority: NOR
Component: general
Assignee: plasma-b...@kde.org
Reporter: mark.b...@gmail.com
Target Milestone: ---
STEPS TO REPRODUCE
1. On a dell with oled screen
2. Lower brightness to 0
3. Raise brightness
OBSERVED RESULT
Screen turns black, and stays like that. Only workaround is to open and close
laptop lid.
EXPECTED RESULT
Screen turn on to 5% brightness
I tried with brightnessctl to raise it, but screen stayed black. I thought it
was a generic Linux issue, but the issue occurs on both Kubuntu as ManjaroKDE.
Ubuntu (gnome) works fine.
I figured it was powerdevil as the moment it got to 0 brightness I got this
message:
dec 24 16:13:19 hostname dbus-daemon[756]: [system] Activating service
name='org.kde.powerdevil.backlighthelper' requested by ':1.52' (uid=0 pid=1669
comm="/usr/lib/org_kde_powerdevil ") (using servicehelper)
dec 24 16:13:19 hostname dbus-daemon[756]: [system] Successfully activated
service 'org.kde.powerdevil.backlighthelper'
SOFTWARE/OS VERSIONS
Linux/KDE Plasma (Manjaro and Kubuntu)
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.88
Qt Version: 5.15.2
ADDITIONAL INFORMATION
I set the severity to grave as this sometimes happen without toggling
brightness, but with also regular power management.
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