https://bugs.kde.org/show_bug.cgi?id=520719
Bug ID: 520719
Summary: Failure to reactivate two monitors connected to the
same computer at 120Hz after automatic turn off; one
of them does not reactivate.
Classification: Plasma
Product: KScreen
Version First 6.6.5
Reported In:
Platform: CachyOS
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: common
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Created attachment 192655
--> https://bugs.kde.org/attachment.cgi?id=192655&action=edit
Log of the CachyOS system
DESCRIPTION
With two 120Hz monitors connected to the same computer via HDMI, when the
screen automatically turns off due to the power management settings, and after
1 or 2 minutes the keyboard or mouse is pressed to reactivate them by
displaying the lock screen, only one monitor turns on. The other remains off
until the HDMI cable is unplugged and plugged back in.
This problem only occurs if both monitors are configured with a 120Hz refresh
rate. If the monitor that doesn't reactivate after the automatic screen turn
off is configured with a 60Hz refresh rate, this problem does not occur, and it
reactivates correctly.
I think this started happening after I installed KDE version 6.6.5; this
problem didn't occur with previous versions.
STEPS TO REPRODUCE
1. Two monitors connected to the same computer with a refresh rate of 120Hz or
higher.
2. Waiting for the automatic screen shutdown triggered by the power management
settings.
3. Wait one or two minutes and press the keyboard or mouse to wake them up
again, displaying the lock screen.
OBSERVED RESULT
One of the monitors will turn on, while the other will remain off indefinitely
until you unplug the HDMI cable and plug it back in.
EXPECTED RESULT
Both monitors should then turn on.
SOFTWARE/OS VERSIONS
Operating System: CachyOS Linux
KDE Plasma Version: 6.6.5
KDE Frameworks Version: 6.26.0
Qt Version: 6.11.1
Kernel Version: 7.0.10-1-cachyos (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 8845HS w/ Radeon 780M Graphics
Memory: 64 GiB of RAM (59,7 GiB usable)
Graphics Processor: AMD Radeon 780M Graphics
Manufacturer: GMKtec
Product Name: NucBox K8 Plus
I've attached a log file in case there's anything there that might give you a
clue about the cause of the problem.
--
You are receiving this mail because:
You are watching all bug changes.
