Windows 10: Issue with Dell U2412M Daisy-Chaining: Resolution and Refresh Rate Problems

I am having problems with a multi-monitor setup with daisy-chaining and the Dell U2412M monitor connected via a BenQ dock. The monitor is not recognized correctly when connecting the BenQ dock to my laptop, so it stays black. Although it is displayed in the settings, it does not show the correct resolution and refresh rate, although it worked perfectly when connected directly via HDMI. Despite enabling MST on the BenQ monitor and checking all connections, the Dell monitor remains stuck at a resolution of 1024x768 and a refresh rate of 60 Hz without

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Daisy-chaining on new PC not working

Hi Kevin, I'm Greg, here to help you with this.

1) Here is how to daisy chain multi-monitors successfully:

How to Daisy Chain Monitors? | BenQ UK

How to Daisy Chain Monitors

How to Daisy Chain Multiple Monitors Using DisplayPort Multi-Stream Tr



2) What kind of switch are you using between the two PC's? It adds the kind of complication that requires more expertise than we have here on multi-monitors which is very rudimentary since that's what 90% of users require.

3) For the connection offering poor resolution you can try these extra steps required for setting different resolution, scaling and refresh rate for multi-monitors:

https://www.addictivetips.com/windows-tips/diff...

https://www.howtogeek.com/304036/how-to-adjust-...

https://www.bluecinetech.co.uk/multiple-monitor...

4) For the very best expertise on this I would ask at the forums with the most multi-monitor experts which is Display Fusion forum here:
Discussions • DisplayFusion by Binary Fortress Software

Display Fusion also makes the best software that does what Windows cannot for multi-monitors, but they don't require it to get all possible solutions in their respected forums.

Feel free to ask back any questions. Based on the results you post back, I will have other suggestions if necessary.

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DisplayPort Daisy Chain on Dell Monitor not working

We have a problem where a user has 4 monitors hooked up to their Windows 10 system with an RTX 2070 for graphics. They wanted to reserve the HDMI slot on the card, so I suggested running their 24" Dell monitors by daisy chaining the last two monitors. We enabled DisplayPort 1.2 in the Dell settings (FYI - you need to have a valid video signal to get to the menu to turn this on) and double checked that MST was enabled for the graphics card. After plugging in the daisy chained monitor, the monitor would flicker an image of the desktop for a second and then go black.

Windows 10 registered that the monitor was attached and daisy chained but we couldn't get an image to display. Looking around the web and I found a lot of articles saying Dell monitors are terrible for daisy chaining but beyond not enabling DP 1.2 and MST, nothing else was a solution to our problem. Since there is an image that flickers when you first hook it up, it seems like it is just a driver or display issue. Any thoughts?

 

DisplayPort 1.2 Daisy chained Monitors suddenly no longer work

Given your clarification and the limitations of your current setup, it's clear that your options for further diagnostics are somewhat restricted. However, there are still a few steps you can take to isolate and possibly resolve the issue, even with the limited hardware at your disposal. Let's refine the troubleshooting approach based on your setup:

1. Graphics Card Outputs: Your RTX 2080 offers a variety of outputs. Since the MST functionality through the Dell monitor is causing issues, consider using separate outputs from your GPU to connect to each monitor directly, bypassing the daisy-chaining setup. This can help determine if the issue is specifically related to MST or if there might be a broader compatibility or hardware issue.
   
2. Alternate Connection Methods: Given that your MSI monitor doesn't require MST functionality, connecting it directly to the GPU using an available port (such as HDMI, using an adapter if necessary) could provide a workaround. This would allow you to see if the system remains stable without relying on the daisy-chaining feature.
   
3. Testing with the Samsung Display: While you believe it's unlikely to influence anything, testing with the Samsung display could offer valuable insights. If connecting the Samsung display directly to the GPU (using the DisplayPort to HDMI converter cable) in place of the MSI monitor results in a stable system, it would suggest the issue is more closely related to the interaction between your MSI monitor and the current setup rather than a general failure of the GPU or the Dell monitor's MST functionality.
   
4. Software and Firmware Check: Revisit the software and firmware aspect, especially focusing on your GPU drivers. NVIDIA releases frequent driver updates that can sometimes address very specific issues. Ensure you have the latest driver, and consider using the NVIDIA Control Panel to manually adjust settings for multiple displays if you haven't already.
   
5. Utilize Available Laptops for Testing: While neither the Dell XPS Convertible nor the old Razer Blade laptop may support MST, they could still be useful for testing the monitors individually. Connecting each monitor directly to the laptops can help determine if there's an issue with the monitors themselves or their compatibility with specific resolutions or refresh rates.
   
6. Monitor Settings and Windows Display Settings: Double-check the monitor settings on the Dell U2414Hb to ensure nothing has changed that might affect MST functionality. Additionally, explore Windows Display Settings and the NVIDIA Control Panel for any settings that might have been reset or changed following your system reset, especially those related to display arrangement, resolution, and refresh rates.
   
7. System Stability Without MST: If the system is stable with direct connections and not using MST, consider if this setup could be a temporary or permanent solution. While it's not ideal given your preference for using daisy-chaining, it might be necessary until you can access additional hardware for testing or until a software/firmware update resolves the issue.