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Yes. I have this exact problem too.
Fix please.

Same problem for me as well.
Seems to switch output from HDMI to internal speaker as soon as there is a longer break, once even after starting and closing virtualbox.
17.3 did remember last used output, so must be something within 18.
Please Fix

I have a similar problem with mint 18, I can hear sounds from headphones and analog out but not from HDMI, HDMI output it's not even shown anywhere, neither in audio setting nor in alsa nor in pavu

if I launch
cat /proc/asound/cards

the result is

0 [MID ]: HDA-Intel - HDA Intel MID
HDA Intel MID at 0xfbbf0000 irq 28

same problem

hmm i followed rene's advices yesterday, nothing happened after reboot
and today sound preferences behave , even after boots
I hope my problem is gone

Ty rene <3 that did it for me

janhostdk wrote:Ty rene <3 that did it for me

Wonderful, and thanks for reporting, but do you know which one helped specifically? The

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pulseaudio -k && rm -r ~/.config/pulse

one or

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echo -e 'defaults.ctl.!card HDMI\ndefaults.pcm.!card HDMI' >~/.asoundrc

or

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sudo sh -c "echo options snd-hda-intel index=1,0 >/etc/modprobe.d/snd-hda-intel.conf"

If the last one, then it seems we're looking at a dumb Pulseaudio bug (if the second, then a perhaps not completely dumb Pulseaudio bug, and if the first perhaps even a not really all that dumb Pulseaudio bug).

nope it did'nt work after several reboots and logins on the day
but the next day it just worked

Well, let us consider the above a potentially useful summary then. None of the described attempted solutions seem to have the potential to not work after a reboot yet work after (supposedly) a full shutdown, meaning something else (an upgrade?) may have rather fixed things -- but oh well, maybe still useful.

I had the problem for some time,i whas just going preferences and change to hdmi every time i startet my pc
Until i got so annoyed that i startet using my lm 17.3...hdd backup

I tried both login out, restart and shutdown after i had tried the commands in terminal
Listened to musik rest of the day and searching for various help on forum
Shutdown
woke up and checked my mail before rushing to work, tried as first to start winamp and play a number
and the sound came in my face at much too loud at 0500 am
checked the preferences, mm hdmi , no updating, upgrading or other serious inbetween

strange but true

I have now installed chrome beta for the pulsaudio . Alsa problem, for now its works fine with streaming...

same problem has reappeared
Ignoring it for now..

Tried a new install of mint 18 from usb stick to new hdd, same problems

Hi, my default sound output is set to headphones built-in audio..
can anyone please help me revert back to analog speakers..


thank you

This started happening to me since I updgraded. 17 was fine. The audio keeps switching to the HDMI audio output source and I have to use "sudo pavucontrol" to revert the audio. This is really annoying!

same problem with hdmi/analog swtiching exists in ubuntu mate too..

Noticed Switching resolution and playing old games (lower ress) seems to activate problem

Hi,
It is the same problem in Sarah 18.1.
Please get it fixed. It is very annoying.
Is it a help if I tell you that if I put it in "standby" it will wake up in HDMI as it should.
Could you please tell me to whom I could complain if the problem is not resolved soon.
To stop using Mint is a bad solution.
Yours sincerely
Amoko

Don't know if this will help others - but it solved this issue for me.

I added:
set-card-profile 1 output:hdmi-stereo+input:analog-stereo
to the end of /etc/pulse/default.pa

I figured out the card number (1) and output string from doing pacmd list-cards. For me the HDMI port shows up under index 1 and then the output string is under the profile section and looked sensible.

Running Mint 18 on a Lenovo Tiny M900 (awesome little unit). The fix has been "active" for almost a week now and works over multiple reboots/suspends/etc

Hi!

Here is one solution for pulseaudio - HDMI no sound problem

Change value from 44100 to 48000 in file /etc/pulse/daemon.conf

As a workaround, set default-sample-rate to 48000 in /etc/pulse/daemon.conf (and restart pulseaudio) or restart computer.

Now you should have HDMI sound on tv or other device.

Do not forget to change sound cards in Sound Settings

Have fun

P.S.
Thank you tom.ty89 from bbs.archlinux.org for solution

I have NV 9600 M GT and it all worked on recent versions of Ubuntu. It still does on Win 7.
But I must manually mute the speakers (because they play alongside with TV) and switch to HDMI output on Serena.

Is there a way to switch automatically between speakers and HDMI just as I connect the cable?