I connected my TV to my laptop using HDMI for a movie and the audio was still playing from the laptop. So, I changed the sound device to the TV and sound got played from TV - All good.
And then, I removed the HDMI cable and started my work. I noticed the 'workspace switch' sound was not heard as well as the logon sound was not heard as well. I played a video but there was no sound.
What's weird is when testing the sound using the 'Test Sound' from the sound settings, sound is working [Front Left and Front Right]. Also the sound while changing the sound volume is also working.
I tried restarting the driver and everything. It didn't work.