I installed Ubuntu 20.04.1 today itself alongside Windows 10, my Asus ROG GL503 laptop. It was working fine until the Software Updater had some updates. When it got completed and restarted, there was no sound when I connect my earphones. And when I tried a few solutions now, there is no sound coming from the laptop internal speakers.
When I boot into Windows, there is no sound when I connect my earphones, but Internal Speakers work.
Paste this line at the end into file
/etc/modprobe.d/alsa-base.conf then SHUTDOWN the system, DO NOT reboot.
# Audio fix for asus GL503 with Intel Corporation CM238 HD Audio Controller (ACL295) options snd-hda-intel model=dell-headset-multi