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I just installed Ubuntu 18.04, and I found the monitor can't play sounds. I connect my monitor with HDMI-HDMI cable. The sound settings are shown below:

Digital Stereo HDMI output selected

Then I installed pavucontrol, which shows these settings:

Output Devices - HDMI DisplayPort (plugged in)

I don't know how to fix this. Can anyone help? Many thanks!

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Update: I fixed this problem by following the steps of installing the NVIDIA Driver.

After I installed NVIDIA Driver and reboot, I found my monitor could play sounds.

What a surprise! I installed the NVIDIA Driver for CUDA, but it fixed my sounds issue!

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  • actually I have no idea which step works for this issue. but it worked somehow
    – Vickyyyyyy
    May 1, 2020 at 5:49

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