My friend's Ubuntu 12.04 is installed with Wubi and there is no Input device in Sound settings. Is there a command to see if there is something visible for the system or a fix for this?
It is a laptop - MSI x360
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You should follow the steps at- https://help.ubuntu.com/community/SoundTroubleshooting for troubleshooting your soundcard.
If you just want to test, this post might help you- How to verify if my microphone input is dead or ubuntu not detected it yet? I can hear music but i cant record audio
Please refer link: