Not sure if the following opinions from Hahn - MSFT Micrisift Agent | Moderator works.
I re-post his opinions as following.
Primary monitor gets no signal from PC after waking up from sleep mode.
https://answers.microsoft.com/en-us/windows/forum/all/primary-monitor-gets-no-signal-from-pc-after/a0e8e3fc-a964-4410-ac82-c1a6bc2b9e61
Welcome to Microsoft Community.
I'm Hahn and I'm here to help you with your concern.
It sounds like your primary Samsung Odyssey G6 monitor is experiencing issues with waking up from sleep mode. This can be a common issue with monitors and usually involves settings related to power management or the display connection. Here are some steps you can try to resolve the issue:
- Check Power Settings: Go to
Control Panel -> Power Options, then select Change plan settings for the power plan you're currently using, and Change advanced power settings. Next, scroll down to PCI Express, click the + icon next to it, and under Link State Power Management, change the setting to Off and click Save changes.
- Update Graphics Driver: Ensure that your graphics card driver is up to date. You can visit the manufacturer's website to download the latest driver for your graphics card.
- Monitor Settings: Some monitors have an option to disable the
Deep Sleep mode in the monitor's on-screen display (OSD) settings. Check if your Samsung Odyssey G6 has this option and disable it if possible.
- Cable Check: Make sure that the cables connecting your PC to the monitor are secure and not damaged. Try using a different DisplayPort or HDMI cable to see if the issue persists.
- Firmware Update: Check if there are any firmware updates available for your Samsung Odyssey G6 monitor. Firmware updates can often resolve compatibility and power management issues.
- Swap Display Ports or Cables: If possible, try using different display ports (HDMI, DisplayPort) or swap cables between the monitors to identify if the issue is related to a specific port or cable.
- Disable Fast Startup: In your PC's power settings, disable "Fast Startup" as it might interfere with the wake-up process of some devices.
- Check for Specific Monitor Software: Ensure that there are no specific software settings or applications installed for your primary monitor that might interfere with the wake-up process. Sometimes, manufacturer-provided software can cause conflicts.
A "clean boot" starts Windows with a minimal set of drivers and startup programs, so that you can determine whether a background program is interfering with your game or program. How to perform a clean boot in Windows - Microsoft Support
If after trying these steps you're still encountering the issue, it might be beneficial to reach out to Samsung's support or the manufacturer of your PC for further assistance, especially if the problem persists even after trying different cables or ports.
I hope these steps help you get your primary monitor working properly after waking up from sleep mode. If you need further assistance, feel free to ask!
Your Sincerely
Hahn - MSFT | Microsoft Community Support Specialist