https://bugs.kde.org/show_bug.cgi?id=500843
--- Comment #10 from JJ <w...@toki.la> ---
I have (finally) re-triggered this bug. It has something to do with external
monitors. The output of `systemctl --user status plasma-powerdevil.service` is
below:
```bash
○ plasma-powerdevil.service - Powerdevil
Loaded: loaded (/usr/lib/systemd/user/plasma-powerdevil.service; static)
Active: inactive (dead) since Wed 2025-03-12 20:16:08 PDT; 2min 52s ago
Duration: 3d 1h 29min 3.794s
Invocation: e01035822b3544d19a9d159ddab777d0
Process: 1203 ExecStart=/usr/lib/org_kde_powerdevil (code=killed,
signal=TERM)
Main PID: 1203 (code=killed, signal=TERM)
Mem peak: 13.3M (swap: 7.1M)
CPU: 1min 1.696s
Mar 12 20:16:08 arch org_kde_powerdevil[1203]: [346881] Emitting
DDCA_Display_Status_Event[264544.462: DDCA_EVENT_DISPLAY_CONNECTED,
card1-HDMI-A-1, dref: DDCA_Display_Ref[11], io_path:/dev/i2c-1, ddc working:
true]
Mar 12 20:16:08 arch org_kde_powerdevil[1203]: [346881] libddcutil callback
thread 0x7ab908014220 started
Mar 12 20:16:08 arch org_kde_powerdevil[1203]: [346881] Started 1 event
callback thread(s)
Mar 12 20:16:08 arch org_kde_powerdevil[1203]: [346882] (ddc_open_display)
Delay before rechecking attribute status: Slept for 1000 millisec
Mar 12 20:16:08 arch org_kde_powerdevil[1203]: [346882] Assertion failed:
"bus_info" in file ddc_packet_io.c at line 266
Mar 12 20:16:08 arch org_kde_powerdevil[1203]: QtDBus: cannot relay signals
from parent QObject(0x653488af7ab0 "") unless they are emitted in the object's
thread QThread(0x653488a4f080 "Qt mainThread"). Current thread is
QThread(0x653488bc3118 "").
Mar 12 20:16:08 arch org_kde_powerdevil[1203]: QSocketNotifier: Socket
notifiers cannot be enabled or disabled from another thread
Mar 12 20:16:08 arch org_kde_powerdevil[1203]: [346882] Watch thread
terminated.
Mar 12 20:16:08 arch org_kde_powerdevil[1203]: QMutex: destroying locked mutex
Mar 12 20:16:08 arch systemd[951]: plasma-powerdevil.service: Consumed 1min
1.696s CPU time, 13.3M memory peak, 7.1M memory swap peak.
```
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