My screen suddenly comes to life unexpectedly.
My screen suddenly comes to life unexpectedly.
Hello, I recently updated some parts of my system and performed a full Windows reinstall. Now the problem is, whenever my monitor goes to sleep (the PC just sits idle), it wakes up unexpectedly after a short delay and then goes back to sleep again. This keeps happening while the PC is idling. I've unplugged all USB devices and other peripherals, closed background services, removed graphics cards, and even changed from DisplayPort to HDMI. The issue persists. Closed out some software too, but it still occurs. It happens even before logging in at a fresh reboot. I've also tried booting in safe mode, but it still wakes up after a while. I'm really confused and not sure what might be causing this. Could there be something in the BIOS that's sending signals I should turn off?
Checked Device Manager for all peripheral settings and noticed this window. Also, Task Scheduler might have a trigger, or you could allow the PC to wake itself and then examine Event Viewer for details on why it woke up.
I've taken steps to prevent those from triggering an alert. All USB connections were removed, leaving only internal devices visible. The system still wakes up, but now only on its own, not from sleep cycles. It doesn't enter sleep mode; the monitor activates, displays the login screen, and then returns to sleep. As long as nothing is disturbed, it continues this pattern.
To resolve the issue, I ran `powercfg -devicequery wake_armed` and disabled a device named USB4 Root Router (1.0). I also kept HID keyboard devices disabled. The screen now stays awake without triggering alerts. Hope this fixes everything! Thanks!
Started again recently; took a while for it to begin. Continued intermittently throughout the night. No devices appear to be active, so the system won’t power on. Also, all USB connections are removed.
It seems like nothing unusual is going on. The items I’ve checked using Kernel-PnP look normal—like the monitor was disconnected because a bus was missing. The device list shows the display was removed due to being absent from the bus. Under the system, the session changed from 4 to 6, but the XML view lists "monitorreason 1." It’s unclear if this affects this particular case. After reinstalling Windows 11 with version 23H2 again, the issue persisted even after a fresh setup. This is getting frustrating. It feels strange it happens with new hardware while the old one didn’t. Mouse, keyboard and other parts remain unchanged.
Let me clarify the situation. It seems you're asking about the sequence of events during startup and whether certain components are present, especially in older systems. I’ll summarize the key points for you.
No major changes are occurring, only windows accessing the system. It's secure and not asleep. The monitor remains consistent, CPU and motherboard are fresh. 9800x3d and ASRock X870e Nova are installed. DDR5 is present too, same brand but faster speeds.
hmmmmm, if Monitor causes problem, and we're assuming the cables are fine, then you could possibly try updating the monitor's drivers, if it has any to update, if you want to try looking for drivers, you look at your monitor's official website, and see the drivers in support page, to not waste your time, you could also just leave it open, go to Device Manager, and check your monitor's driver version, just in case it's not later or same version as the one on website.