Strange, I didn’t have any issue, but it is true that I have an old gtx.

First of all, connect both displays to the same board, or you may have strange issues with the vrr and accurate color display.

Second use this Guidefor the drivers, once the repos are added you can use the graphical package manager for selecting the Nvidia drivers.

During the installation, Nvidia drivers needs to be compiled for your specific kernel version, so it always takes a bit of time.

And nothing else to do, Nvidia are always a pain in the ass, specially with his tendency of making the drivers incompatible between minor kernel updates, so if you didn’t select it during install, activate the automatic snapshot for the zfs before and after updates, in case there is something not properly updated you can rollback, continuous working for a few days until all the changes are propagated to all packages and update again.

First: Go to the openSUSE community forums. Advice there is going to be best.

Unfortunately when trying to run a game (I could only try ProjectDiva Megamix+ and another game which I know is unreliable) I couldn’t get dxvk to work, it would always give me a “directx 11 not found” error. The other game I mentioned runs on dx9 and had similar issues, failing to create a graphics context from what I can tell from the logs. The first game runs if I force WineD3D. On my primary PC running OpenSUSE with an RX 9070xt and on my Steam Deck the game works perfectly.

I’m skimming this, but if you’re wanting to test, use glxgears (OpenGL) and vkgears (Vulkan). They’re pretty simple and self-contained.

DXVK lives at a higher level, so I’d go try dicking around with that once I’m sure that the above are working fine and using your hardware.

WineD3D (can) use OpenGL. DXVK uses Vulkan. If forcing WineD3D works, it might be that you’re having trouble with Vulkan stuff. I don’t do much with Nvidia hardware, but one thing I’ve seen before was not having Vulkan and/or OpenGL userspace stuff installed — especially for the particular architecture.

On the Debian trixie system on which I’m typing this:

$ dpkg -l|grep vulk
ii  libvulkan1:amd64                          1.4.309.0-1                          amd64        Vulkan loader library
ii  libvulkan1:i386                           1.4.309.0-1                          i386         Vulkan loader library
ii  mesa-vulkan-drivers:amd64                 25.0.7-2                             amd64        Mesa Vulkan graphics drivers
ii  mesa-vulkan-drivers:i386                  25.0.7-2                             i386         Mesa Vulkan graphics drivers
$

OpenSUSE may package them under different names, but I think that that might give an idea. Note how I’ve got two different architectures for each installed. 32-bit binaries (i386), including WINE/Proton games will need the 32-bit stuff.

OK first, do you need both iGPU and the Nvidia GPU to be working at the same time? Your desktop environment will expect to work with one card at a time so plugging screens into both while you’re doing setup tasks could cause problems. Linux can certainly work with 2 GPUs but I wouldn’t have both active with displays plugged in from the start when installing a fresh system.

It’s telling that you can’t even get the official Nvidia drivers working. You then “fix” things by removing the cable from the iGPU after having all these problems and installing the Nouveau drives. I think this could be the source of your problems.

I think there is a real risk your whole system is misconfigued due to both cards being “active” while you set things up.

While it’s probably fixable within Linux, personally I’d go back to basics - plug the displays only into your Nvidia card, and do a fresh install of Tumbleweed, and see where you’re at.

You could even go further and disable the iGPU in your bios and then install tumbleweed. However I would be reluctant to do that as if your Nvidia card is broken it can be difficult to undo without a working display. Alternatively you could also use the iGPU for the install (nothing plugged into the Nvidia card), do the install and then switch over and set up the Nvidia within Linux.

Regardless, I’d say trying to get DX11 working with the Nvidia now on Open drivers seems to be just pushing the problem further and further down the line. You’ll have more problems long term and never fix the root problem. The first issue is getting the official Nvidia drivers actually working, rather than working around that problem.

First of all… Always follow the distribution’s instructions for this kind of thing. Second, I suppose you installed the proprietary drivers, but your GPU is a 30xx so you should really get the open drivers instead. There’s a paragraph on that in the page you linked, try that and see if it works.

I don’t have an iGPU, but when trying to install nVidia drivers the only method that worked for me was following this video.
Hope it helps

Opensuse Tumbleweed or Leap? Have you tried using ProtonPlus?