There are four graphics cards, but lspci | grep - i nvidia can only discover three

Graphics / Linux Linux
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I used to have four graphics cards, but today when I ran nvidia-smi I found that there were only three graphics cards left. After running lspci | grep - i , it also showed that there were only three graphics cards left. Is this because the graphics card is physically damaged?

I used Nohup to run the backend training program on the lost graphics card

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image

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nvidia-bug-report.log.gz (982.1 KB)

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image1110×866 49.8 KB

After sudo cat /var/log/gpu-manager.log
why card0 is driven by “mgag200”? how to solve this problem?

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It’s probably the integrated server graphics gpu (Matrox).