Thank you for sharing your experience.
With my 2080 Ti NVSURROUND is working correctly too.
I have bought a second Inno3D 3090 second handed for my client pc. This was a X3, while to first one was a X4.
It shows the same issue.
I have tried with 8K DP to HDMI cables and 1 DP to HDMI (with adapter) : both cards have 1x HDMI plus 3X DP.
Cables and adapter where 8K.
Both displays are Sony Bravia 4K 43” tv’s and only have HDMI connections.
I did not try updating the displays firmware yet, so that I will try.
Yesterday I got a respond from NVidia. Unfortunately their suggestion did not work :
1.First download and install the Revo Uninstaller from here:
http://www.revouninstaller.com/
There is a 30 days trial period.
2. Restart windows in Safe mode with networking
3. Once in Windows launch the Revo Uninstaller tool.
4. Uninstall all NVIDIA entries. There should be a few and they all should start with "NVIDIA....".
5. After each one you uninstall, Revo will give you option to scan for additional registry entry. Do the scan for each component and then select all the additional left-over registry entries and delete them all. This way all traces of all NVIDIA components will be removed.
6. When all NVIDIA entries have been removed, restart windows in Safe mode with networking again.
7. If windows detect new hardware and prompt to install driver then cancel if you can but if not then allow it to proceed and complete first. Restart Windows in Safe mode with networking again if prompted, otherwise proceed to next step.
8. Navigate to "C:\Program Files" and delete the entire "NVIDIA Corporation" folder if it exists.
9. Navigate to "C:\Program Files (x86)" and delete the entire "NVIDIA Corporation" folder if it exists.
10. Download and Run the driver from here:
https://www.nvidia.com/download/driverResults.aspx/164741/en-us
11. Accept the license agreement.
12. Select the "Custom (Advanced)" option.
13. Put a checkmark in the 'Perform clean install" checkbox.
14. Follow the on-screen instructions to complete the install.
For a ticket :
https://nvidia.custhelp.com/app/home
Make sure to open an account.