I installed Ubuntu 20.04.1 today alongside Windows 10 on 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 connected my earphones. And after trying a few solutions, there is still no sound coming from the laptop's internal speakers.
When I boot into Windows, there is no sound when I connect my earphones, but Internal Speakers work.
I had same problem with asus GL703GM.
The fix was to edit /etc/modprobe.d/alsa-base.conf and add the this line at the end:
options snd-hda-intel model=headset-mode
When done editing, shutdown the system completely (do not restart).
However the headset mic didn't work, but it ok with me as the internal laptop mic was OK.
Original post: (Ubuntu 20.04 headphones detected but no sound)
you may read the https://forum.manjaro.org/t/sound-from-speakers-no-sound-from-3-5mm-jack-audio/5343/20 link thread for better solutions.
I had a very similar problem on my Dell laptop, especially when running Audacity.
The snd-hda-intel model=dell-headset-multi config looked promising but it didn't work. At first I thought I had solved it by reverting an update of alsa-utils. I went back from 1.2.2-1ubuntu2 to 1.2.2-1ubuntu1 using Synaptic Package Manager. This update came out a few days after your question so I guess my issue is not exactly the same as yours.
aplay -l lists ALC3204 as my audio device in case someone needs this info.
When running alsa-utils 1.2.2-1ubuntu1, Audacity is kind of picky with audio devices but I can unplug and then plug my earphones in again to make everything work.
When running the 1.2.2-1ubuntu2 version however, plugging my earphones/headphones simply doesn't work. They are detected but no sound comes out. If I manage to get some sound (after rebooting a few times), then Audacity ruins everything leaving me with no sound on the 3.5mm jack again.
It seems that the problem manifests itself more clearly when booting with earphones plugged in and reconnecting the earphones while the settings app is open. Otherwise it might work correctly on either alsa-utils version, but 1.2.2-1ubuntu1 looks much more stable/predictable so I'm sticking to that version.
I'm using Asus GL503GE and in my case the options snd-hda-intel model=headset-mode worked but the microphone of the headset didn't work. However, the microphone present in the laptop worked fine.
To get the microphone for both the inputs working I used options snd-hda-intel model=dell-headset-multi.
I also use PulseAudio Volume Control to quickly change the input from device microphone to headset microphone.
Use sudo apt-get update -y then sudo apt-get install -y pavucontrol to get the program.
(On POP OS go to Files/Other Locations/Computer/etc/modprobe.d/alsa-base.conf Then add the above lines as you wish)
To Edit the File change the permission by opening the folder in terminal and typing sudo chmod +rwx alsa-base.conf. Then use gedit to open and edit it sudo gedit alsa-base.conf and save it. Net shut down and not restart
