No sound after unplugging the headphones from the computer

Question

I have an issue with my sound system.
Whenever I start my freshly installed Ubuntu 20.04 machine, the sound works just fine. When I plug the headphones, the sound switches to the headphones with no delay, everything perfect so far.
The problem starts when I unplug the headphones: I can hear nothing!
Plugging the headphones again works, the sound will once again be in the headphones, but no sound on the speakers whatsoever.
I checked the sound output device in the 'Sound' menu, the speakers get auto-selected when I unplug the headphones and I can even see the sound intensity on that bar made of green dots. (don't know how it's called).
My machine is a HP Zbook G5 Studio.
Let me know if any of you has any possible solutions.

Cristian Anghel · Answer

I'm also on a HP Zbook G5 Studio and what worked for me was following these steps:

Uninstall pulseaudio using: $ sudo apt-get remove pulseaudio alsa-base
Reboot, now there won't be any sound info since there is no driver, but don't worry.
Install pulseaudio again: $ sudo apt-get install pulseaudio alsa-base
Reboot again and it should be fine, at least it was for me.

I should also note that I did this process after updating from Ubuntu 20.04 to 21.04

Hrishikesh Kadam · Answer

The only trick that works for me currently is to Suspend and Wakeup the Laptop.

gungnir2414 · Answer

Running
mv  ~/.config/pulse/ ~/.config/pulse_old/

and restarting my machine did the trick.

No sound after unplugging the headphones from the computer

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