[kde] [Bug 486153] New: monitor goes blank or to sleep after being turned on in dual monitor setup

[Rajinder Yadav]

https://bugs.kde.org/show_bug.cgi?id=486153

            Bug ID: 486153
           Summary: monitor goes blank or to sleep after being turned on
                    in dual monitor setup
    Classification: I don't know
           Product: kde
           Version: unspecified
          Platform: Other
                OS: Linux
            Status: REPORTED
          Severity: critical
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: devguy.ca at gmail.com
  Target Milestone: ---

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SUMMARY

I have a dual monitor setup. When I lock my system and turn off both monitor
using power, then later turn them on and log back in,  one of my monitor will
go back to sleep as if it's not getting a signal. It just goes black and this
is getting supper annoying.

In the past I just had to turn the monitor off and on, then move the mouse
cursor into the monitor area and move it around for a few seconds to prevent it
from going back to sleep. Well today no suck luck it just kept turning off and
I was unable to use the monitor.

I was forced to reboot for this bug to go away. I don't know when this bug
showed up, because before I just left this monitor always on.

It's definite not lose cable, because then it would continue to happen after a
fresh reboot, but it never gose to sleep.

If this was my only single primary monitor, I would not be able to use my
system.

STEPS TO REPRODUCE
1.  Need dual monitor setup
2.  Lock computer
3.  Turn both monitor off using their power button.
4. Later after sometime, turn both monitor on.
5. Log back in.

OBSERVED RESULT

One of the monitor will come out of sleep and then goes back to sleep.

EXPECTED RESULT

Both monitor stay awake.

Operating System: openSUSE Tumbleweed 20240423
KDE Plasma Version: 6.0.4
KDE Frameworks Version: 6.1.0
Qt Version: 6.7.0
Kernel Version: 6.8.7-1-default (64-bit)
Graphics Platform: X11
Processors: 24 × AMD Ryzen 9 5900X 12-Core Processor
Memory: 62.7 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 3080/PCIe/SSE2
Manufacturer: Micro-Star International Co., Ltd.
Product Name: MS-7A38
System Version: 8.0

## Other Info

The monitor model going to sleep: HP L2445m

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