30
votes
Accepted
Raspberry Pi Zero with Ethernet Over HDMI
No, the Pi Zero does not support ethernet over HDMI.
Unfortunately the schematics for the Pi Zero are not available (edited: an overview schematics is available now, see updated information below). ...
- 15.8k
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 ...
- 713
26
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:/...
- 58.5k
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 ...
- 488
19
votes
Accepted
Can Raspberry Pi 3 do 4K Video?
The best information I can find suggests that it's possible to output 4K resolutions, but at fairly miserable frame rates. The Pi 3 has the same GPU as the Pi 2, so the information should still be ...
- 10.7k
14
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.
- 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 ...
- 11.9k
10
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 ...
- 15.8k
9
votes
Accepted
How to reinitialize HDMI without rebooting the RPi
To /boot/config.txt add:
hdmi_force_hotplug=1
You will have to reboot to make that effective (this applies to anything in config.txt), but the display should work now if you plug it in after boot. ...
- 58.5k
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.
- 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 ...
- 106
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 ...
- 58.6k
7
votes
How to reinitialize HDMI without rebooting the RPi
Try
tvservice --explicit="DMT 35 HDMI"
This powers on HDMI explicitly with "DMT mode 35" which is 60 HZ at 1280x1024 pixels.
There is also tvservice --off if you've got enough.
For more ...
- 6,215
7
votes
Raspberry Pi Not Working
Based on the type of flashing of the green (ACT) LED, you can figure out what is wrong (or at least what ballpark it's in) by looking at this page.
Too long didn't read version:
Green LED: ACT LED
--...
- 6,365
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 ...
- 6,827
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 ...
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 ...
- 6,827
7
votes
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 ...
- 229
6
votes
Touchscreen w/ HDMI output only when a display is attached?
You need to do two things :
1 Setup your xorg.conf with two layouts , HDMIOnly and TFTOnly. Use this as inspiration : https://www.raspberrypi.org/forums/viewtopic.php?f=44&t=91764&start=25#...
- 6,215
6
votes
Why my HDMI->DVI converter works only when powered from PC?
I am not sure if you solved this. I came to the exactly same problem this week. The R-Pi with HDMI->DVI video turns on only when powered from PC. With an external power supply it shows only a black ...
- 61
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 ...
- 58.5k
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.
- 71
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 ...
- 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 ...
- 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 ...
- 27.7k
6
votes
How do you make the HDMI hot-pluggable on a Pi?
In 'Raspberry Pi Configuration', select 'Set Resolution'
Choose resolution, then reboot.
- 6,827
5
votes
Accepted
How to use Raspberry PI 2 without screen and keyboard?
SSH is a good way to access the command prompt over a network, via ethernet or wifi. VNC is a good way to access the desktop of your pi over a network. https://www.raspberrypi.org/documentation/remote-...
- 6,365
5
votes
Accepted
Display goes blank periodically on LG TV
It could be possible that you are overvolting your Pi, and when you plug your fan in it drops the voltage. Have you tried using a different power supply? Also, have you tried using a different HDMI ...
- 6,365
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 ...
- 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 ...
- 11.9k
Only top scored, non community-wiki answers of a minimum length are eligible