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30 votes
Accepted

Turning 'tvservice' on and off leaves screen blank

tvservice is not the best to turn off and on the screen. Much better way to do this (found after a day of searching) is using vcgencmd command (more on this here). vcgencmd display_power 0 turns off ...
lewiatan's user avatar
  • 713
27 votes

How do you make the HDMI hot-pluggable on a Pi?

In /boot/config.txt: hdmi_force_hotplug=1 hdmi_group=1 hdmi_mode=16 Those are explained here: https://www.raspberrypi.org/documentation/configuration/config-txt/video.md There is also this: https:/...
goldilocks's user avatar
  • 59.3k
23 votes

Keep HDMI off on boot

There is a few things you can try: Edit /etc/rc.local and add the following lines above exit 0: Disable HDMI /usr/bin/tvservice -o this will turn off the display, but only somewhere during the boot ...
Eugen's user avatar
  • 488
15 votes
Accepted

The purpose of the orange tape on the HDMI connector

I believe the tape is useful for manufacturing using a vacuum based pick and place machine. The machine can't pick the parts up if they're full of holes. Removing it shouldn't do any harm.
goobering's user avatar
  • 10.7k
11 votes

Detect HDMI and Start GUI

There's a command line utility, tvservice built into Raspbian that will tell you the state of the HDMI. To detect the full state, you can use the command: tvservice -s. On my RPi this currently ...
Jacobm001's user avatar
  • 11.9k
10 votes

SOLVED No HDMI video after boot sequence

After trying many configs and workarounds I found this thread https://github.com/raspberrypi/firmware/issues/1647. I ssh into Pi and edited /boot/config.txt to comment out this line, uncommented by ...
kaldimar's user avatar
  • 299
9 votes

RPi zero ethernet connection via HDMI port using a HDMI to RJ45 adaptor

No. HDMI to Ethernet adapters are used to send HDMI display data over an Ethernet cable, rather than network data over HDMI. This won't work.
goobering's user avatar
  • 10.7k
9 votes
Accepted

Raspbian Put monitor to sleep at night and wake in morning

I am using xset dpms force off to turn off the display. This command uses Display Power Management Signaling. In a cron job, you'll need to set the DISPLAY variable, so that the crontab entries ...
Steffen Uhlig's user avatar
9 votes
Accepted

RPI3B+: What are the four components below the HDMI connector called?

While the official Raspberry schematics don't tell a thing about these components we can learn from the picture of the PCB that they are connected to the paired pins 1 and 3, 4 and 6, 7 and 9, 10 and ...
Ghanima's user avatar
  • 15.9k
8 votes
Accepted

Pi 4B Won't boot without HDMI cable plugged to Monitor

The most likely scenario is that the Pi has booted, but you have asked it to do the impossible i.e. boot to Desktop when there is no default Desktop (an examination of the boot logs would probably ...
Milliways's user avatar
  • 60.5k
7 votes
Accepted

How can you set the HDMI resolution of the Raspberry Pi Zero W to 320x240?

Edit the /boot/config.txt file and add the following : hdmi_force_hotplug=1 hdmi_cvt=320 240 60 1 0 0 0 hdmi_group=2 hdmi_mode=87 For reference : hdmi_force_hotplug=1 Use HDMI mode even if no HDMI ...
CoderMike's user avatar
  • 6,997
7 votes

Pi 4B Won't boot without HDMI cable plugged to Monitor

This in fact is a known problem with the Sense-Hat. See https://github.com/astro-pi/python-sense-hat/issues/96 for detail. Apparently, the Sense-Hat interferes with the resolution auto-detection if ...
Thor Schueler's user avatar
7 votes
Accepted

Why can't you connect Raspberry Pi to a Laptop via HDMI

Most laptop hdmi ports are output not input. They are designed to connect a laptop to a monitor. There are a few that have hdmi input. You could use VNC Viewer on your laptop to view the Pi screen (by ...
CoderMike's user avatar
  • 6,997
6 votes
Accepted

New Touchscreen Project - GPIO or HDMI

The safest touchscreen would be one that is built for the pi and has in-tree kernel drivers so you do not get stuck having to use a manufacturer's OS image that is likely to fall (or already be) out ...
goldilocks's user avatar
  • 59.3k
6 votes

No video for Raspberry Pi Zero W

Same issue a few days ago. Order of plugged in peripherals mattered. Making sure video out was connected before connecting power.
alrightmight's user avatar
6 votes

RPI3B+: What are the four components below the HDMI connector called?

While I can't specifically identify them from this picture where any markings they may have are hidden, that is almost certainly the problem with your HDMI output. If you look at the three that are ...
rpseu's user avatar
  • 357
6 votes

RPI3B+: What are the four components below the HDMI connector called?

What you have is a manufacturing defect called a cold solder joint. There was not enough heat or flux present to properly wet the solder to the component. This is a very weak joint, and may have ...
Steve's user avatar
  • 177
6 votes

RPI3B+: What are the four components below the HDMI connector called?

Is that even fixable? Certainly, if you have the required skills. I would put high-temperature solder flux around the component and heat it up until the tin melts, at which point the component could ...
Dmitry Grigoryev's user avatar
6 votes

How do you make the HDMI hot-pluggable on a Pi?

In 'Raspberry Pi Configuration', select 'Set Resolution' Choose resolution, then reboot.
CoderMike's user avatar
  • 6,997
5 votes
Accepted

How much current can I draw from each model's HDMI socket?

I think I might have figured this out as far as is possible. The schematics for various Pis are provided by the RPi Foundation here. The schematics for all revisions (1.0, 2.0 and 2.1) of the ...
goobering's user avatar
  • 10.7k
5 votes

New Touchscreen Project - GPIO or HDMI

In my opinion, one of the biggest advantages of using HDMI or DVI out is compatibility. Screens sold for the RPi that use a GPIO connector usually ship with a special image, and you're stuck using ...
Jacobm001's user avatar
  • 11.9k
5 votes
Accepted

Can I watch movies with the Rasberry Pi Zero?

All Raspberry Pis can play 1080p@30fps provided the video is encoded with a codec the Pi can accelerate (i.e. h.264) - note that filename extension doesn't always indicate the used codec correctly ! ...
flakeshake's user avatar
  • 6,213
5 votes
Accepted

Force sound over 3.5mm jack and video over HDMI

use rasp-config to force sound in 3.5 jack. To do so use below commannd sudo raspi-config and then select 9 Advanced Options Configure advanced settings and then select A9 Audio ...
rajesh6115's user avatar
5 votes

How can I change the HDMI resolution without rebooting my Raspbian system?

You can sort of. But it is not working really well. At least in the command line you can turn off the HDMI port and get it back on with a different resolution. So you are good for Raspbian Lite. Here ...
kwasmich's user avatar
  • 2,702
5 votes

Raspbian Put monitor to sleep at night and wake in morning

You may want to look into HDMI CEC which allows you to send commands such as power on/off via HDMI to a TV set. There's a libcec for this, as well as an cec-client. For instance, this blog post about ...
TheDiveO's user avatar
  • 1,591
5 votes
Accepted

Raspberry Pi 4 touchscreen misbehaving when using a secondary monitor

The answer lies in this document: ELI Touch Screen Calibration in Linux First of all, we need to check the name of the display with the following command: xrandr For me, it was DSI-1. Then we need to ...
dJani's user avatar
  • 211
4 votes

Raspbian, no audio HDMI, have tried all the troubleshooting I can find

After going through all the answers I found what worked for me after more than an hour.As simple as right click on the speaker and change it to hdmi.
Jose A. Cruz's user avatar
4 votes

Audio goes in and out on Retropie

I had this same problem on my Vizio. There is nothing wrong with your Pi: this is a Smart TV "feature". They call it volume leveling and it is on by default. You should be able to turn it off from ...
Red's user avatar
  • 41
4 votes

New Touchscreen Project - GPIO or HDMI

The Raspberry Pi Foundation sells a 7" touchscreen that connects to the Pi's on board DSI port over a ribbon cable, and connects to the Pi's GPIO pins for power. I would go with this one, as it is ...
Matthew's user avatar
  • 141
4 votes

New Raspberry pi video output to laptop not working

You're trying to connect two outputs to each other, which won't work. If your Pi is running Raspbian then SSH should be up and running by default. Two things could be stopping you from connecting: ...
Aaron F's user avatar
  • 166

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