Bug 493974

Summary: When sleep is manually invoked on opened laptop connected to DP monitor, both laptop and monitor immediately wake up again
Product: [Plasma] plasmashell Reporter: Nate Graham <nate>
Component: Power management & brightnessAssignee: Plasma Bugs List <plasma-bugs-null>
Status: CONFIRMED ---    
Severity: normal CC: jpetso, julien.dlq, kdedev, natalie_clarius, typingcat
Priority: NOR Keywords: multiscreen
Version First Reported In: 6.2.4   
Target Milestone: 1.0   
Platform: Other   
OS: Linux   
See Also: https://bugs.kde.org/show_bug.cgi?id=490623
https://bugs.kde.org/show_bug.cgi?id=505953
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Nate Graham 2024-10-02 16:02:56 UTC 
Current git master everything built on top of Fedora KDE 40. Qt 6.7.2, Kernel 6.10.11.


STEPS TO REPRODUCE
1. Have a laptop plugged into a DisplayPort monitor. In my case it's this one: https://www.bhphotovideo.com/c/product/1718042-REG/hp_4q8n9aa_aba_24_qhd_90hz_hdr400.html, and the laptop gets power from the DisplayPort cable going to the monitor.
2. With the laptop's lid open and an active session, click Kickoff > Sleep


OBSERVED RESULT
Laptop goes to sleep and screen turns black, then in a second or two, the laptop wakes up and displays the lock screen. The external monitor turns back on, too.


EXPECTED RESULT
Both the laptop and external monitor remain asleep until woken up.
Comment 1 Nate Graham 2025-03-06 21:52:56 UTC 
*** Bug 500878 has been marked as a duplicate of this bug. ***