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Questions tagged [hdmi]

High-Definition Multimedia Interface (HDMI) is a compact audio/video interface for transmitting uncompressed digital data.

2039 questions
122
votes
31 answers

External monitor not detected on Ubuntu 18.04

After upgrading to Ubuntu 18.04, my laptop has been unable to detect/use an external monitor attached via HDMI. Even when plugged in, the "detect displays" button within the default settings app doesn't do anything. Here is the output from…
PullJosh
  • 1,331
94
votes
14 answers

Changing the screen brightness of the external screen

I have installed Ubuntu 16.04 LTS on my laptop and connected it to an external monitor via an HDMI cable. I can easily change the brightness of the laptop screen but that does not affect the brightness of the external monitor. Is there any way to…
Ad Infinitum
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83
votes
6 answers

Ubuntu refuses to output audio via HDMI

I have my PC hooked up to speakers and a monitor. In addition, it is hooked up to my Vizio 37' LCD Television. When I was on Windows 7, I could choose to output sound via HDMI. I have the choice in Ubuntu but no sound is outputted. Any Ideas? I…
Michael
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47
votes
16 answers

HDMI port not detected on Ubuntu 18.04

The HDMI port of my Lenovo IdeaPad 500S with Ubuntu 18.04 LTS is not working. I also executed the xrandr command, but only the primary monitor is detected. How can I solve my problem? How can I check that HDMI is not broken? Thanks in advance.
Federico Magliani
  • 633
39
votes
4 answers

How can I disable an audio HDMI device?

powertop reports that Intel CougarPoint HDMI is 100% active and there are reports that this device consumes a lot of power. If that is so, I would like to disable it as I never use it. Is there a way I can disable it? I am using Ubuntu 11.10
webm0nk3y
  • 950
39
votes
4 answers

Firefox doesn't play audio

To be clear, the audio on my laptop is working just fine. Other applications in Ubuntu play sounds as expected. Firefox, however, won't output any audio through the native speakers or headphones. There is one exception: when I use HDMI from PC to TV…
Loewen-Samuels
  • 393
36
votes
6 answers

Static and crackling in my HDMI audio?

So, I managed to dual boot Windows 8.1 and Ubuntu 13.04. In Ubuntu 13.04, I installed the drivers for my graphics card(AMD HD Radeon 7700 Series, I'm pretty sure it's a 7790 one and Intel HD Graphics 4600 for Motherboard, but this shouldn't be…
TehSephirothSpirit
  • 463
36
votes
10 answers

No sound on HDMI Ubuntu 20.04

I just installed Ubuntu 20.04 on my laptop which is a bit outdated: CPU: Intel Core i5 CPU M 480 @ 2.67GHz RAM: 4GB Video card: GeForce GT 420M Audio: GF108 High Definition Audio Controller NVIDIA and Audio 5 Series/3400 Series Chipset High…
Lucas
  • 369
34
votes
4 answers

How do I get the Ubuntu Dock off the secondary monitor?

I updated to Ubuntu 18.04 a few weeks ago with little to no problems until now. After an update I installed and a reboot, my sidebar (Ubuntu dock) shows on the secondary screen, which is my Laptop, while my HDMI monitor is saved as the primary and…
WayneNani
  • 453
32
votes
3 answers

Ubuntu command line to change input source on a display monitor?

I have two PCs connected to Dell U3415W monitor, one with ubuntu 14.04 LTS OS with HDMI input and other with windows 10 with DP input. What I want to do is toggle between these two input sources without using on screen menu buttons (OSD). For…
Saurabh Verma
  • 423
32
votes
6 answers

How to remove Nvidia HDMI audio output in PulseAudio?

At each reboot, PulseAudio sets a sink (in my case, "HDMI Audio Output") as the default. So, at each reboot, I don't hear any sound, and need to reconfigure the default sink each time to "Analog Output". How do I remove/disable a specific sink such…
manatlan
  • 423
29
votes
5 answers

Set HDMI sound output automatically on connect/disconnect

I have a dual screen setup on my laptop (using 12.04 LTS) using a HDMI connected display. Everything works fine, but everytime I connect/disconnect the cable I have to go to Sound preferences and change the sound output device manually. Is there any…
Salem
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27
votes
11 answers

Nvidia X Server Settings only shows 1 screen (laptop + external monitor connected)

I have recently installed a new copy of Ubuntu 14.04 on my Dell M3800 which has Nvidia Quadro K1100M graphics card. Later I also connected my external monitor via HDMI (HDMI to DVI connector). Then I started seeing sluggish screen performance on my…
Chantz
  • 423
27
votes
6 answers

ubuntu 20.04, second monitor on hdmi port not detected

It seems to be a common issue but I could not find a solution. just clean installed Ubuntu 20.04 Desktop and updated it with the "Software & updates" tool. PC:HP ProDesk 400 G4 Desktop-Mini-PC The monitor attached on one of the DisplayPort ports:…
call me Steve
  • 371
25
votes
5 answers

HDMI is not displayed in the "Sound" settings on Ubuntu 14.04 LTS

I need some assistance, I have 2 laptops, a Toshiba and a DELL XPS M1330, the problem is using my DELL laptop, when I use the HDMI cable to use the TV as monitor the display works fine however the sound only work in the laptop speakers I can't use…
Oso
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