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Better OSD is what you're looking for. It works very well on Ubuntu 18.04. It is a Gnome extension, that is available via Ubuntu Software too. After installing it via Ubuntu software, you can access to its settings via Gnome tweaks>Extensions (if you don't have Gnome Tweaks, you can install it from Ubuntu Software too). Here are some screenshots of what I ...


Alternatively, system-wide solution using pulse: Get sink list pactl list sinks | grep name: Use remap module to map channels pactl load-module module-remap-sink sink_name=mono \ master=<sink_from_prev_cmd> channels=2 channel_map=mono,mono To stop it, Unload the module pactl unload-module module-remap-sink For permanent setup, add command from ...


I had the same problem, but it got fixed automatically on update of the kernel from 5.0.0-23-generic to 5.0.0-31-generic. Check your kernel using the command: uname -r

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