*** If you're not sure this is actually a bug, instead post about it at https://discuss.kde.org If you're reporting a crash, attach a backtrace with debug symbols; see https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports *** 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
I just put my system to ram sleep without turning off the monitor this time. when I woke up the system, I had the same problem with the same monitor. However this time it didn't come out of sleep so I had to press the power button to toggle it off then on.
In the previous comment, when the system woke from ram sleep, the other monitor light turn from amber (sleep) to green (wake), however the screen was black as if still sleeping.
Another update, my 2nd monitor now keeps turning black, the power light is green so its actually on and no in sleep mode. This seems to be happening only when coming out of sleep mode, either Linux or using the power button on the monitor to turn it off for a little while when PC is locked.
Here is a video showing the bug: https://www.youtube.com/watch?v=z_ouimMQVvY
Closing this issue, seems like my monitor has the problem, got a duplicate monitor and it's working fine with the same cable.