10

So I'll start by explaining my situation.

I actually have had my current installation for some time now (Though I upgraded from 14.04 to 16.04), and the computer I used is an inexpensive one I bought just a few years ago, and slapped Lubuntu on. However, it comes with an integrated AMD GPU, that I never installed the driver for. The consequence of this was being completely shut-off from OpenGL, which wasn't something that bothered me enough to go to the trouble of installing a driver for. Until certain software I use started making use of OpenGL.

Well, a few hours ago I decided to install the proprietary fglrx driver provided on AMD's website.

First thing I noticed was that OpenGL content now works.

Second thing I noticed was that sound doesn't. PulseAudio outright lists it as "HDMI/DisplayPort (unplugged)", even though the video still shows on my screen.

So I've been trying to make use of Google to find a solution to my issue, but nothing seems to work for me. So before I go mad, I've decided to ask the community.

Some more information:

  • I make use of PulseAudio to manage my sound, mostly because Alsa never seemed to even recognize my HDMI audio, and because my keybindings for adjusting Audio never worked for some reason. I have tried reinstalling PulseAudio, with no success.

  • Something I have already tried during my search (as some people seemed to suggest), was editing /etc/default/grub, and changing the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.audio=1". Even after rebooting, there is no change.

  • I've also tried adding my user to various groups, such as "audio", "video" and so on, as that suggestion also came up in a few searches. No change.

On person claims they simply changed the profile for their devices to "plugged", but I don't see any way for me to do that, assuming I even can.

If anyone has a solution, I'm all ears.

Edit: I ended up reverting to the "Open Source" drivers provided by Ubuntu, but for some reason, I am still having the same issue. PulseAudio still says "HDMI/DisplayPort (unplugged)" is shown, even though the HDMI video is clearly working.

  • Try login with the guest user or create a new temporary user and see if the problem still exists. If not, then it's a user configuration problem so try deleting the file ~/.pulse-cookie and the folder ~/.config/pulse and reboot. – Thanos Apostolou Jun 12 '16 at 23:33
  • do you have another hdmi device and cable you can try this with ? it sounds like possibly your monitor doesn't have anything wired to the hdmi audio pins, this could be the case for a monitor with no sound or audio outputs. – Amias Jun 13 '16 at 13:06
8

Thank you !

pacmd set-card-profile 0 output:hdmi-stereo mostly solves the problem

if not,

CtrlAltF1

then

CtrlAltF7

solves it.

| improve this answer | |
  • I often have this problem because I frequently take my laptop on the road. I have to admit I didn't try the command line, but the key sequences are faster than typing the command (I guess I could set up an alias that makes it untrue), and worked like a charm. Are there any downsides to using the terminal login trick? – hlongmore Jan 9 '19 at 20:17
3

Had the exact same thing with an old Radeon 6900 Series.

To see info on pulseaudio devices:

pacmd list-cards

Look for card INDEX and under that, PROFILES. For instance, I had:

2 card(s) available. ****index: 0**** name: <alsa_card.pci-0000_01_00.1> driver: <module-alsa-card.c> owner module: 6 properties: alsa.card = "1" alsa.card_name = "HDA ATI HDMI" ... profiles: ****output:hdmi-stereo****: Digital Stereo (HDMI) Output (priority 5400, available: unknown)

Those bits of info then are used to set the output profile:

pacmd set-card-profile 0 output:hdmi-stereo

Note that the set-card-profile parameters are the card index ('0') and the output ('hdmi-stereo')

After that, things just worked.

Queues came from here mostly: https://devtalk.nvidia.com/default/topic/528470/linux/pulseaudio-reports-hdmi-audio-is-unplugged-from-the-nvidia-mcp79-device/

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3

You cant do this on the default sound properties you need pauvcontrol

sudo apt-get install pavucontrol
pavucontrol

go to the configuration Tab

find your device

choose a profile that is plugged.

updated: fixed typo in pavucontrol

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  • ah yes , good spot fsanches , i've updated to fix – Amias Jan 4 '17 at 14:32
3

ctrl+alt+f1 & ctrl+alt+f7

I have the same issue, each time i suspend the system and wake it up pulseaduio says hdmi is unplugged.
i do the following:
ctrl+alt+f1
to go to terminal log in
then
ctrl+alt+f7
to go back to GUI
now pulseaudio says hdmi is plugged in (under output devices)

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1

I will try to help you. It sounds like your HDMI is working ok, but try this if you haven't already.

  1. First, plug in your HDMI cable.

  2. Go to settings and click on Displays.

    Displays

3.Now click on Mirror Displays.

  1. Finally, click on apply.

That does it for the video. Now you'll want to adjust the audio so that you hear it from you television.

  1. Click on the volume control on the top right hand corner of the monitor.

volume

  1. Now scroll down to Sound Settings. You should see this screen:Sound_Settings

  2. Click on the HDMI menu in your sound settings and you are good to go.

I hope this helps.

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  • The OP is using Lubuntu. Sound Settings is not available. – Organic Marble Oct 20 '16 at 11:29
  • Mirror displays solved it for me – Hjulle Aug 9 '19 at 11:54

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