I have a problem with Ubuntu 18.04 and chromium for some time. It also happens with Mint 19. In all applications or websites where I need to use the microphone (and that I could use before) such as dictation.io, or voice to text, when I press the microphone button to capture the sound, he always tells me "there is no Internet connection". I have Connection. Permissions to use the microphone too. And the microphone works well, because I can record with it. I do not know what it can be, but any help will be appreciated, because I have searched and searched for the same problem and possible solutions and I have not found anything. Thank you all for everything
In recent versions of Ubuntu (19.10 and above, ref.), Chromium is installed in a snap. By default, snap isolation allows camera but not microphone.
You can change this graphically using similar to How do I give chromium permissions to read files of my /usr or /tmp folders? - Ask Ubuntu or via command line, ref. How can Snap permissions be viewed and modified? - Ask Ubuntu.
Command line access to graphical configuration:
Full command line solution:
Go to Ubuntu Software center and check Chromium permissions.
Currently it requires "Record Audio" and "Play and record sound" permissions for microphone in my Ubuntu 20.04 system.
Install real Chrome instead of Chromium.