Its one of the best UI distros out there, and have been wanting to switch to it for day to day use.
OS 15 got stuck with Nvidia on dell G7, which looks to have been sorted in 16.
However, now stuck on Dell Latitude E5440 HDMI has no sound. If I try the test, (clicking on test left or test right) will eventually produce some audio (after 10~15 seconds), but still no audio once test is closed. Pavucontrol shows all as expected.
I've also recently discovered on a few distros I've been playing with have no sound but on opening sound in Settings the volume is set to zero and as soon as you start sliding the volume control you'll hear the 'ping' notification sound.
I have this problem example when my jack phone and cable creating short circuit. It could be problem with port pins or cables not correct abut. Trying diffrent port or recognize a correct drivers when installed correct some plugins alsa or another things. This is not problem software operating system but hardware. When you find correct drivers then sound will back to normal working. It happens when you start operating system or restart system? Check in bios if you don't have off or on some hardware audio options.
Good to know what audio soundcard you have or using some dac ? Dragonfly?
It remind me my problem when bios or cmos have saved drivers correct for windows but switch to linux not recognize because they are not working. Clear bios and then maybe help. I know Bios have some memory. Can you checked if you have hard reset bios?
The final fix that worked for me came from support. This immediately changed my card from showing Dummy Output to the correct HDMI choice under the sound output.
If your sound device is still listed as "dummy output", please try opening the Terminal (Ctrl+Alt+T) and running these 2 commands:
echo "options snd-hda-intel dmic_detect=0" | sudo tee -a /etc/modprobe.d/alsa-base.conf
echo "blacklist snd_soc_skl" | sudo tee -a /etc/modprobe.d/blacklist.conf
Then, please restart your computer to apply the changes.