Questions tagged as ['hdmi']

High-Definition Multimedia Interface (HDMI) is a compact audio/video interface for transmitting uncompressed digital data.
Score: 0
Brendan Mesters avatar
Second screen is zoomed in
bd flag

I'm having trouble with a second screen on my laptop.

So I found a TV screen somewhere (Samsung) and tried plugging it into my laptop, it does work (as in I get an image) the only problem is that it is zoomed in to far. I'd guess that 5-10% of the screen gets cut off (at the top, bottom, right and left). I had seen some advice on similar posts about xrandr but am unable to fix it, does anyone have advic ...

Score: 0
Amin Abdiyan Mobarakeh avatar
Ubuntu 20.04.3 doesn't recognize display port
jp flag

when I connect DP to monitor. Ubuntu will not recognize the monitor.

but when I use DP to HDMI adaptor and connect to HDMI of monitor it works (see attached picture)

I also installed mesa.

when I enter xrandr output is (DP also is connected):

Screen 0: minimum 320 x 200, current 1366 x 768, maximum 16384 x 16384
LVDS-1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 256mm ...
Score: 1
gou avatar
External DELL screen is not working with Ubuntu 21.04 on Thinkpad
gb flag

I am trying to connect my Lenovo, Thinkpad laptop with my DELL external screen via HDMI. Either the external screen blinks and shows the colors in very bad quality or it doesn't connect all with "No HDMI signal from your device" message. Laptop runs Ubuntu 21.04.

My external screen works fine via the same HDMI cable with another laptop. Moreover, my Levono, Thinkpad also works fine with another externa ...

Score: 0
Manuel Oliveira avatar
Lost connection to external monitor after Ubuntu update
cn flag

I have just installed Ubuntu 20.04.3 on my laptop (Omen 15 [2020])

I did an update of the following packages:

pc@myPc:~$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages have been kept back:
  libnvidia-cfg1-470 libnvidia-compute-470 libnvidia-decode-470
  libnvidia-encode-470 libnvid ...
Score: 0
phealy avatar
Saving Display Configuration (Monitor Position, Primary, Refresh Rate)
pt flag

I have something of an unusual setup with my Ubuntu desktop and Windows laptop. The two devices share two monitors, one main monitor using the monitor's input switch (DP for the desktop, HDMI for the laptop) and one secondary monitor switched using a KVM (HDMI for both.)

When I use my laptop during work hours, I set the main monitor to use HDMI from the laptop, and set my Ubuntu display configura ...

Score: 0
Rudeku avatar
Ubuntu 21.04 - 2 out of 3 screens work (Nvidia / Ryzen laptop)
us flag

I'm using Asus TUF A15 laptop with Ubuntu 21.04 installed (Ryzen 5800 / RTX 3060)

My usual setup is made from 2 screens - laptop's internal (144hz/1080p), and external monitor connected over DisplayPort (144hz/1444p).

Today I dusted off an old monitor which I planned to use as third screen (60hz/1080p), over standard HDMI albeit after connecting I encountered a problem.

For some reason I can use only t ...

Score: 0
retrosnob avatar
HDMI monitor stopped working after windows laptop plugged in
za flag

I'm running Xubuntu 20.04.3 LTS with Nvidia GTX 1050 Ti graphics card on my desktop. Everything was fine until I plugged my windows laptop into the same monitors that my Linux system uses. My desktop uses HDMI and displayport for monitors 1 and 2 respectively and my laptop used displayport and HDMI for monitors 1 and 2 respectively. After I disconnected my laptop and reconnected my desktop my HDMI monit ...

Score: 0
Unable to run Ubuntu Desktop GUI on Xilinx's ZCU104
us flag

I am trying to boot a Ubuntu Desktop 20.04.3 LTS image on my Xilinx ZCU104 platform. While I am able to login using the serial port, I am unable to view the GUI on my monitor. I see some boot commands and then the screen goes black. I have a few questions -

  1. Which port of the ZCU104 gives the GUI output feed? The ZCU104 has 2 HDMI ports and 1 display port. I tried using all of them but nothing worked  ...
Score: 0
Dan Sorak avatar
Recent update to Ubuntu 20.04 has disabled (removed) my HDMI audio as an option
in flag

My HDMI audio, which was previously working with Ubuntu 20.04 on my Lenovo W540 laptop while docked and attached to my Benq external monitor is no longer available as a sound device.

I am using the NVidia GK106GLM driver (nvidia-driver-390) for the built-in Quadro K2100M GPU.

It is not that the sound is no longer working, but within the last week or two the HDMI output device is not even appearing i ...

Score: 0
Tomasz Sipel avatar
HDMI no signal after installation of Ubuntu 21 on notebook [with broken matrix]
in flag

I am trying to install Ubuntu 21 dual boot with win10. I managed to create live USB which runs great on HDMI, but whatever I do, I always get no signal on HDMI output after installation reboot. I did also tried installing Ubuntu 20, for which installator works ultra slow (3-4 sec for reaction after any click) but after reboot I got signal as long as I didn't update Ubuntu and install Nvidia drivers (tri ...

Score: 0
Majid Dareini avatar
HDMI port not working and black screen appears when activating computer after sleep
ca flag

I had a black screen problem while booting my ubuntu and I got help of this link and deleted some files in recovery mode as root and I could solve my problem. However I still have black screen problem when activate my computer after sleep. also,the HDMI port doesn't work anymore. I searched and found no solution to solve my problem. Any idea?

Tnx for helping.

Score: 0
OM629 avatar
Crackling/distorted HDMI audio
mx flag

EDIT: I realized that every time the audio would be crackling also computer performance overall would be worse, reason was broken GPU.

So I am running a HDMI cable to my television from my PC where I have Ubuntu 21.04 and I have been battling against an issue for few weeks now where the HDMI audio is crackling and distorted

Everything I have tried so far:

Adding "tsched=0" to back of the line "load-module ...

Score: 0
Aprimer avatar
Ubuntu20.04 and win10,The HDMI dont have output on win10
nz flag

My desktop is thinkpad X390 yoga,use Ubuntu 20.04 and Win10.When I shut down the Ubuntu and log in Win10,the monitor on HDMI dont have signal,and when I unplug the HDMI connector and plug it in again,it works normally.So how can I do to avoid to unplug and plug again when I log in Windows after Ubuntu.Thanks!

Score: 1
How to force pulseaudio to default to the correct sound card, device, port?
za flag

Note: This problem occurs because Pulsaudio ignores the settings set by user in the settings-sound menu.

How to force pulsaudio to default to correct audio device?


  • Ubuntu 21.10; NVidia gtx1050ti.


  • 4k monitor plugged into DP port;
  • hdmi2av adapter plugged into hdmi port;
  • analogue stereo plugged into hdmi2av converter.

Desired outcome:

  • 4k video on monitor;
  • HD sound from stereo ...
Score: 0
faustoo avatar
HDMI to USB-C doesn't work
tn flag

Recently I bought an adapter to connect my USB devices and HDMI via USB-C to my laptop (with Thunderbolt). In Windows, HDMI works correctly and I can use the display normally via the adapter, but in Ubuntu I cannot make another display appear when connected via this adapter.

Is there any solution to this? I should say that if I connected the display via HDMI from the laptop then it works normally ...

Score: 0
UBUNTU 20.04 simply switching from USB-C to HDMI Did not work
cn flag

I have an intel nuc that has a USB-C port and and an HDMI Port. When i switch from USB-C to HDMI I get a black screen on my My HP LCD monitor. When I am connected to USBC I use a cable with USBC on the Intel Nuc and HDMI on the other end.(This works fine) The cable I am switching to is simple and tested HDMI cable. I only get black display on the HP LCD monitor. Cable switches like this work all day lon ...

Score: 1
L. Z. avatar
Ubuntu 20.04.3 resolution 3440x1440 iiyama GB3466WQSU
us flag

I bought new monitor to my home (iiyama GB3466WQSU) for my laptop HP Probook 455R G6. Currently I tried connecting it via hdmi and I cant use 3440x1440, its not appears on display settings. I read that this monitor model hdmi supports up to 3440x1440 100hz.

display resolutions settings

In office Im using another ultrawide monitor Samsung (don't remember model) and it works with 3440x1440 on hdmi.

Trying different sets of cable  ...

Score: 0
GUI won't start on boot 20.04
dk flag

It started with a frozen screen, I rebooted, and can SSH in, but no GUI login.

I see these errors:

#> systemctl status gdm.service:

syslog has:

Process org.freedesktop.systemd1 exited with status 1

If I boot in recovery kernel, the limited GUI shows on screen (HDMI from Intel GPU on motherboard)

# lshw -C display
       description: VGA ...
Score: 1
TVG avatar
Display lag on external monitor with ThinkPad Dock
cn flag

I have a ThinkPad Hybrid USB-C with USB-A Dock connected to a ThinkPad T14 laptop with Ubuntu 20.04 and a DELL external monitor. I had no display on my external screen until I installed the following driver: Since then, display is working (both in HDMI and DP) but response time is very slow. Any idea how to fix this?

Many than ...

Score: 0
Faisal 44 avatar
My second screen isn't recognized
hk flag

Suddenly Ubuntu doesn't recognizing my second screen anymore, even though it was working before. So I switched the HDMI cable (although it is working well on Windows). Now it works again but it is lagging out. I can't watch a video or open any software on it. Please, is there any way to fix it?

I have Asus TUF gaming laptop with a Ryzen 7 and GeForce GTX 1650 driver version 470.74 and the latest  ...

Score: 0
SakacVladimir avatar
HDMI disconnected on 20.04
in flag

I have a laptop with a Geforce 3060 graphic card and a Ubuntu 20.04 installed, currently using the nvidia-driver-470. The problem is I can't use my external monitor because the HDMI port is disconnected (I'm using dual boot and it works fine on Windows). External monitor is Samsung SyncMaster T240.

I tried installing nvidia-driver-460-server with no luck. I also tried switching between lightdm an ...

Score: 0
meccooll avatar
No sound/audio via HDMI from KVM ubuntu guest
ng flag

I have sound over HDMI on my Ubuntu20.04 host, but when i decided to play with KVM/QEMU/virt-manager i can't get the sound to work on the Ubuntu20.04 guest. virt-manager showing the following options for sound: AC97, HDA(ICH6), HDA(ICH9) none of which seem to work


02:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590]
Score: 0
How to make HDMI display show in LightDM greeter right after boot?
es flag

After upgrading from Xubuntu 18.04.x to 20.04.3 I have this problem with HDMI output: It is recognized only after I log in a graphical session (but not during that session) and log out the session. (If I use Budgie Desktop, it automatically logs out.) If I log in again, the HDMI output works in the session, too. Here is the related bug report. Apparently Nvidia driver is not loaded before I log in. How t ...

Score: 2
Tejas A M avatar
Ubuntu Desktop on Rpi 4 8GB no display after boot
in flag

So I used the regular raspberry-pi-imager tool for windows and flashed the "Ubuntu Desktop 21.10 (RPi 4/400)" on my brand new raspberry pi 4 8GB ram model.

During the boot, the regular RGB spectrum is shown and then I'm presented with the loading screen with the ubuntu logo in the middle of the screen and the spinner below that and the "ubuntu" text below the spinner.

After a while the screen goes b ...

Score: 0
Yair Daon avatar
Ubuntu blank screen for a few seconds
us flag

Ubuntu gives me a blank screen every time I open an app.

  1. This happens when I connect HDMI, two USBs, ethernet and power to my USB-C port (via an adapter).

  2. It does not freeze - I can still hear music.

  3. Checking /var/log/syslog as suggested here I see many screen configuration attempts at the time of said blank screen (see below).

  4. I guess Ubuntu is trying to find the best screen resolution, and it ...

Score: 0
HDMI audio device not found anywhere. Please help
ua flag

I have an Huawei Matebook 13 2019, running on Ubuntu 20.04.3 LTS. Model wrt-wx9 in bios, says wrt-w19 on the laptop. GP108M [GeForce MX250] / Mesa Intel® UHD Graphics 620 (WHL GT2). The hdmi comes through a usb-c dongle. Video shows good, but hdmi audio device is not listed. The laptop has both intel and Nvidia gpus. In ubuntu I'm using latest Nvidia recommended drivers, and prime-select nvidia. The sa ...

Score: 1
Georgi avatar
5.1 not running over HDMI
za flag

I have the following setup: PC (Ubuntu 20.04 LTS with Nvidia GeForce 1050Ti, Nvidia X server installed) connected over HDMI to Samsung Q85 TV, which is connected over HDMI ARCH, to a 5.2 (Dolby Atmos Onkyo system).

I tested PulseAudio and I only get sounds from the left/right speaker, but non of the rest.

At first, I thought it could be due to one of the HDMI cables, and I rotated a bit with a 3rd ( ...

Score: 0
Pavel avatar
Ubuntu 18.04.6 (5.4.0-87-generic) at NUC10i7FNHN no sound: Dummy Output
eg flag

OK. I know there are may be incompatible sound cards. But in my case I've manged to have sound via HDMI twice! And then, after reboot its lost again. I believe it's because of some race condition in configs, hardware detection etc. Please help if you know something about how ALSA works deep inside.


sudo cat /proc/asound/card0/codec* | grep HDMI

Codec: Intel Kabylake HDMI
  Pincap 0x0b000094:  ...
Score: 0
Ubuntu 20.04 does not detect external monitor through HDMI/DisplayPort adapter
th flag

I am trying to set up an external monitor to my laptop (Lenovo ThinkPad E14 Gen2). The monitor doesn't have an HDMI port, so I am using an HDMI/Display port adapter, but Ubuntu doesn't seem to detect the monitor. When I use the HDMI cable without the adapter (i.e. with my TV) it works perfectly.

This is the output of xrandr:

Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
eDP-1 ...
Score: 0
Tom  avatar
Dual monitor, second monitor does not display after Ubuntu20.04 fell asleep
hm flag

Ubuntu20.04 does not detect second monitor, the monitor says "no signal detected", everytime it falls asleep. When I turned off the power of monitor, and unplugged the HDMI cable, the Ubuntu does not change the display mode. It is extended mode and my second monitor is the primary display. I can't see the login GUI because my second monitor does not display.

Moreover, the single display mode is g ...