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Derek
Asked: 2020-09-23 18:46:10 +0800 CST

20.04 HDMI Audio Option Disappears Upon Locking Screen

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Running Ubuntu 20.04. This past Monday it updated to the Nvidia 450 driver (1080 Ti). At first, apt upgrade just removed the 440 driver and refused to install the new one, but in the additional drivers utility I was able to install the new 450 driver. Since installing it, the HDMI audio stops working and the option to select it as an output device disappears when I lock my screen (Meta (windows key) + L) and unlock with my password. A reboot recovers the HDMI audio. Anyone know what's going on/how to fix? SPDIF never stops working.

Thank you,

Derek

sound drivers nvidia hdmi 20.04

2 Answers

  1. Same issue here. When it happens, I stop PulseAudio with a terminal command:

    pulseaudio -k

    PulseAudio then restarts automatically and works again until the next time.

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  2. I discovered the same issue. I run Ubuntu 20.04 with KDE.

    I updated the Nvidia driver from 440 to 450; now if I lock my computer & turn off my screens (one is a TV connected with HDMI), the next time I turn the screens on & unlock my computer there is no output device.

    Yes, a reboot will fix this. But at least in my case it looks like the problem actually is that PulseAudio can not recover the configuration, respectively the profile.

    If I re-enable the profile manually as follows the output device works again:

    1. open "PulseAudio Volume Control"
    2. open the tab "Configuration"
    3. enable the "Profile" (checkbox) for your "High Definition Audio Controller" & select the correct available HDMI output.

    I hope this helps a bit, so you don't need to reboot your computer to fix your sound issue.

    I will continue to search for a final solution, but for now this is the only information I can provide.

    Kind regards

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