I am still super curious why systemd doesn’t restart it automatically.
But as far as I know pulseaudio gets killed by the OOM killer. And if you tweak it as described here, problem gets less frequent.
But to actually fix the problem, the systemd service would have to be tweaked somehow, so it detects pulseaudio problem and restarts it (it is already set to always restart, but for some reason it doesn’t work), pulseaudio would have to get excluded from the OOM Killer, which I don’t think is possible, or we would have to wait for a new OOM Killer daemon, which can choose which app to kill, which will probably take a ton of time.
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