https://bugs.kde.org/show_bug.cgi?id=493135
Bug ID: 493135
Summary: Laptop screen remains turned off but KDE is otherwise
functional after closing laptop lid, the screen turns
back on in other virtual consoles but the state
persists in kde's virtual console
Classification: Plasma
Product: Powerdevil
Version: 6.1.5
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: plasma-b...@kde.org
Reporter: gr...@chilon.net
CC: natalie_clar...@yahoo.de
Target Milestone: ---
SUMMARY
I'm using a fairly new system with a Intel(R) Core(TM) Ultra 9 185H which has
embedded intel arc graphics. Using plasma 6 on wayland.
After putting my laptop to sleep, then opening the lid, the screen turns on
(i.e. can see some kernel messages about resuming from sleep) but then when KDE
resumes the laptop screen gets turned off (remains black without the backlight
turned on). However kde is still running and functional, I can open a terminal
using krunner (without being able to see anything) type "touch blah" and then
verify that the file is created. This problem occurs whether "lock screen on
sleep" is enabled or not.
I can switch to the sddm display via ctrl+alt+f2 and then the screen turns on,
but switching back to kde with ctrl+alt+f1 turns off the screen again. The only
way to get kde back with a working screen is to switch to a shell virtual
terminal via ctrl+alt+f3 and run `systemctl restart sddm`, then login again.
Suspend/resume works fine under gnome and xfce, only plasma 6 on wayland is
affected. I didn't try plasma 6 on X11.
I turned off systemd's handling off the lid open/close events, so only kde has
control of this.
STEPS TO REPRODUCE
1. Have intel arc graphics
2. Close laptop lid to sleep
3. Open laptop lid
OBSERVED RESULT
KDE is functional but the screen remains turned off. Switching to another
virtual terminal turns the screen back on, but switching back to KDE's virtual
terminal always turns it back off.
EXPECTED RESULT
KDE should not turn the screen off after wake.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: archlinux
KDE Plasma Version: 6.1.5
KDE Frameworks Version: 6.5.0
Qt Version: 6.7.2
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