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paVVin avatar Ubuntu

No image on third monitor on dual gpu Ubuntu 18.04

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paVVin

I have a following system:

  • Ubuntu 18.04;
  • Kernel 5.4.0-131-generic;
  • 2x Nvidia GT1030 with 2 interfaces each: DisplayPort and HDMI;
  • Monitors connected to DP and HDMI on the first card and to HDMI on the second;
  • Nvidia 515 drivers installed.

I don't have any picture from 2nd GPU. Both GPUs are fine, I've tested it by leaving only one connected and there were no problems. But when I connect both GPUs, I only get image from first one. Monitors and PCIs out of question also, I've tried all variations of setup.

I've tried:

  • purging and reinstalling nvidia drivers;
  • deleting x's config and reconfiguring;
  • enabling BaseMosaic and Xinerama;
  • setting metamodes;
  • booting with pci=realloc option;
  • a lot of googling.

I'm out of ideas. I'd like some ideas on what can be a problem there.
Here's some outputs and logs:

  • xrandr (it doesnt show second HDMI no matter what);
  • xrandr --listproviders (shows only one provider);
  • lspci (both cards are connected and detected properly);
  • lshw -C video (both cards are there, but for some reason they have same physical ID, I tried to connect different GPU in the second slot and it still had same ID as first one);
  • nvidia-bug-report
  • here you can find some xorg configs that I've tried.
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Terrance avatar
id flag
Terrance
I wish I had a second video card in my system, let alone another PCIe slot to try this out, but as far as I know you need to SLI the two cards together so that they act as one. See https://enterinit.com/how-to-enable-nvidia-sli-in-ubuntu/ as it tells you how to do it via command line.
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