Bug 449263

Summary:	Laptop screen not controllable when hdmi DDC monitor is plugged in
Product:	[Plasma] Powerdevil	Reporter:	hockeymikey <hockeymikey>
Component:	general	Assignee:	Plasma Bugs List <plasma-bugs>
Status:	RESOLVED DUPLICATE
Severity:	normal	CC:	albertvaka, kde, nate, ngoquang2708, nowa
Priority:	NOR
Version:	5.23.5
Target Milestone:	---
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description hockeymikey 2022-01-27 19:58:44 UTC

SUMMARY
I have an Omen 15 2020. So when a DDC enabled monitor is plugged into the hdmi port, powerdevil (with -DHAVE_DDCUTIL) is able to control it, but then the laptop monitor ceases to be controllable. Unplugging the hdmi monitor allows the laptop screen to be controlled again.

STEPS TO REPRODUCE
1. Plug DDC monitor into laptop
2. Try to dim screens

OBSERVED RESULT
Only dims DDC monitor

EXPECTED RESULT
Dims DDC monitor and laptop screen.

SOFTWARE/OS VERSIONS
Linux: Arch
KDE Plasma Version: 5.23.5
KDE Frameworks Version: 5.90.0
Qt Version: 5.15.2

Comment 1 Nate Graham 2023-05-23 16:06:31 UTC

*** Bug 469895 has been marked as a duplicate of this bug. ***

Comment 2 Albert Vaca Cintora 2023-05-24 21:59:51 UTC

Thanks for the bug triaging work Nate! I know we usually prefer keeping the oldest bug when marking as duplicate, but given the conversation happened in the other thread I think it would be best to do it the other way around in cases like this :) I added a reply on the other bug.

Comment 3 Nate Graham 2023-05-25 03:38:40 UTC

Sure, that makes sense.

Comment 4 Nate Graham 2023-05-25 03:38:50 UTC

*** This bug has been marked as a duplicate of bug 469895 ***