I am trying to enable SLI on Ubuntu 18.04 (drivers v418) with 2 2080 RTX (and 2 Titan RTX on another computer) and a NVLink component, and check that it is enabled.
I followed this guide (https://download.nvidia.com/XFree86/Linux-x86_64/418.56/README/sli.html) and generated a xorg.conf file from nvidia-settings before enabling SLI with nvidia-xconfig --sli=on.
However, after rebooting, I could not find anyway to check if SLI is enabled or not. nvidia-settings does not seem to provide any information about its status, and I could not get any info from dmesg or journalctl.
The only info I could get is that nvlink is enabled. Is there anyway to check it via logs or a command?
I tried to apply the recommendation from the guide but I don’t really understand the check, and I could not detect any difference in lspci -t output before and after enabling SLI.
Thank you for your answer.