Bug 487871

Summary:	Cannot transfer images from the PC monitor to the TV
Product:	[Plasma] KScreen	Reporter:	Ярослав <yarik499>
Component:	common	Assignee:	kscreen-bugs-null <kscreen-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	nate
Priority:	NOR	Keywords:	usability
Version First Reported In:	6.0.5
Target Milestone:	---
Platform:	Manjaro
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:	6.1.0
Sentry Crash Report:
Attachments:	attachment-104069-0.html

Description Ярослав 2024-06-01 08:26:38 UTC

SUMMARY
The computer is connected to the monitor via a DisplayPort cable and to the TV via HDMI (TV model: MiTV-MSSP1). When attempting to switch the output from the monitor to the TV, the monitor goes blank, but the TV continues to display a "no signal" message. After this, the win+p key combination stops working, and the only way to restore the image on the monitor is to unplug the HDMI cable from the TV.

In the reverse situation, when trying to switch the image from the TV screen to the monitor, no problems occur. The only way to display the image on the TV is:
1. Switch to image duplication mode.
2. Switch the output to the TV only.
3. Change the screen resolution back to 4K from 1080p.

KDE Plasma version: 6.0.5
KSE frameworks: 6.2.0
Qt: 6.7.1
Kernel: 6.9.2.1
Graphics platform: X11
Graphics card: RTX 3060 Ti

STEPS TO REPRODUCE
1. Connect the computer to a 1080p monitor via DisplayPort and to a 4K TV via HDMI.
2. Use hotkeys or screen settings to switch the display output from the monitor to the TV.
3. There will be no image anywhere.

OBSERVED RESULT
no image output at all

EXPECTED RESULT
image output is transferred from monitor to TV

SOFTWARE/OS VERSIONS
Windows: 11
macOS: no
Linux/KDE Plasma: manjaro
(available in About System)
KDE Plasma Version: 6.0.5
KDE Frameworks Version: 6.2.0
Qt Version: 6.7.1

ADDITIONAL INFORMATION
It is worth noting that the PC has no issues displaying the image on the TV after a reboot or after waking it from sleep mode. The problem only occurs when you try to switch the image from the monitor to the TV, and it does not happen when switching from the TV to the monitor.

Comment 1 Nate Graham 2024-06-11 23:21:54 UTC

What is the exact method by which you switch the output to the TV only? Can you write detailed steps for this, since there are a few ways to do it.

Comment 2 Ярослав 2024-06-12 07:01:06 UTC

Created attachment 170402 [details]
attachment-104069-0.html

I only know of two methods to switch the display output: using win+p and through the screen settings found in the system tray. Both of these methods do not work (or did not work).
  
If, when turning on the PC or during its operation, the PC monitor was chosen as the sole display output, the only way to display the image on the TV is through the duplication mode. Any other method will result in a "no signal" message on the TV.
  
Unfortunately, I can't provide more information because due to this bug, I switched to GNOME and no longer use a PC with KDE Plasma.
  

  

  

  
  
  
  
  
>   
> В 12 июн. 2024 г. в 2:21 AM, Nate Graham  <bugzilla_noreply@kde.org>  писал:
>   
>   
>   https://bugs.kde.org/show_bug.cgi?id=487871
>
> Nate Graham  <nate@kde.org>  changed:
>
>  What |Removed |Added
> ----------------------------------------------------------------------------
>  Status|REPORTED |NEEDSINFO
>  CC| |nate@kde.org
>  Resolution|--- |WAITINGFORINFO
>
> --- Comment #1 from Nate Graham  <nate@kde.org>  ---
> What is the exact method by which you switch the output to the TV only? Can you
> write detailed steps for this, since there are a few ways to do it.
>
> --  
> You are receiving this mail because:
> You reported the bug.

Comment 3 Nate Graham 2024-06-12 16:19:39 UTC

Aha, this is a bug that was fixed in Plasma 6.1. Sorry to hear that it made you switch to GNOME, but that's on us.