Posts by Da Flex

I've been installed a power button and a status LED on my RPi3B+. This works for RPi4B, too. After SSH login, you can use the nano editor to create or edit all necessary files.

Power Button Hardware Part

Use GPIO03 (Pin #05) and the opposite Ground (Pin #06) to connect a push button for power on / off.

Power Button Scripting Part

Add dtoverlay=gpio-shutdown to config.txt.

Switching off will let the shutdown menu appear.

To shutdown instantly instead, create this /storage/.kodi/userdata/keymaps/keyboard.xml:

<keymap>
    <global>
        <keyboard>
            <power>shutdown</power>
        </keyboard>
    </global>
</keymap>

Status LED Hardware Part

Use GPIO13 (Pin #33) and the opposite Ground (Pin #34) to connect an LED. Also use a resistor with 330 Ohms or more.

Status LED Add-On Part

Install the Raspberry Pi Tools add-on to use the GPIO programming library in Python.

Status LED Scripting Part

The status LED will be triggered from autostart.sh, which calls the Python script status_led.py . It will switch off automatically at shutdown, no script action required for this part.

Create this /storage/.config/autostart.sh :

#!/bin/sh

(
    python /storage/scripts/status_led.py
) &

Create this /storage/scripts/status_led.py :

#!/usr/bin/python

import sys
sys.path.append('/storage/.kodi/addons/virtual.rpi-tools/lib')
import RPi.GPIO as GPIO

# Replace YOUR_CHOSEN_GPIO_NUMBER_HERE with the GPIO pin number you wish to use.
# Make sure you know which rapsberry pi revision you are using first.
# The line should look something like this e.g. "gpio_number = 7".
led_gpio_number = 13

# Use BCM pin numbering (i.e. the GPIO number, not pin number).
# WARNING: this will change between Pi versions.
# Check yours first and adjust accordingly.
GPIO.setmode(GPIO.BCM)

# Switch LED on.
# LED will switch off automatically at shutdown by using normal GPIO state.
GPIO.setup(led_gpio_number, GPIO.OUT)
GPIO.output(led_gpio_number, True)

Reboot.

Quote from Mj1857

Thank you but I am not sure if that can be the case either as libreelec is perfectly working fine on the same tv with rpi2 andd 3's.

I think it's possible, because CEC data is merged into A/V data. RPi4B uses a different graphics driver to deal with higher resolutions and two HDMI outs. CEC signals have to be filtered out of the HDMI stream, before CEC adapter can handle it.

Quote from Mj1857

Thank you - I've tried that already but it doesnt work - changed 5 different cables but no luck

OK, then it's probably not the HDMI cable.

My final idea is that your TV uses special CEC codes, which are not yet implemented for RPi4B.

You could write a bug report, and become a part of the solution.

Write the full TV model name, and give a link to this thread, so devs can know about what you already did.

HDMI is a standard, and the only parameter that could really change between devices is data transmission speed.

My advice is to take the HDMI cable from the working TV, and plug it into the not working one. Just to be sure it's not the cable. As you know, some HDMI cables are ready for high speed, and others are not, so CEC data could get lost.

I had the safe mode bug today at LE 9.1.002 (RPi3B+).

It happened after I've been added the Kodi Nerds repo, and installed / uninstalled "Amazon Prime Music" from there.

After shutdown and power on I went into safe mode.

I did a reboot from SSH, and normal mode worked again. Maybe it helps to find the bug.

Quote from Mj1857

...such a shame i have to return this pi now and wait for a proper build to come out first.

Not so fast! RPi4B is a brand new device, which takes time at the software part. Don't forget it's made by hobby programmers.

Thanks for the info. The RPi4B is a brand new device. Just wait until all the little things will be fixed.

Also you can do a formal bug report, or just mention it at News and Announcements, where some developers are reading, too.

Quote from edjalmo

I do something similar, but just to reboot Kodi. Since I use another programs in background and If I not reboot Kodi will be slowly with the past of days. What I wished is do this, automatically, based on tv power on/off, and just Kodi, not LibreELEC.

But I think this is impossible.

I think it could work. Use the RPi always-on for CRON, and switch Kodi / tvservice (HDMI) on / off with a button connected to GPIO.

I haven't seen any related errors on your log. Maybe the MKV's have different horizontal resolutions, and the filled space is just black on your other players. Look at the MKV's meta data for differences.

Quote from edjalmo

I found this, but how I can do this automatically for when I turn tv on?

The major problem is that you disable CEC when you switch HDMI off.

If you're familiar with electronics, you could install an infrared receiver element on your RPi. So you can turn HDMI on by IR code.

An easier solution is to install a push button, and listen to it by an autostart script (similar to the well known power button on RPi).

Take into account that an RPi Zero is cheap, and you can even run LE on it just for CRON jobs.

To run LE headless, switch HDMI off from autostart.sh. As I already mentioned, switching off works.

In theory you can switch HDMI off and on by using the "tvservice" command with the appropriate options. That would save energy. I was playing around with that command a couple of month ago, but I was not successful to switch HDMI on after switching it off. Maybe it's working with the current LE version.

Or you could buy another RPi, and run one of them headless (Raspbian) for your CRON services. Install a power button on the other one, where you run LE.

Yes, read here.

An RPi2 is definitely the wrong hardware to display such high resolutions. So, it's not a bug, it's a feature to keep it disabled.

I had a safe mode issue, too, shortly with LE 9.1.002. I think it was triggered by a settings change I made.

I have been changed "Settings -> Services -> General -> Device name". My advice is to keep this setting untouched at "Kodi".

Quote from Mario77

I use analogue output a lot connected to an old Dvd Surround Sound System and audio is normal as when playing dvd's..

I always leave the audio setting ON to both analogue and hdmi audio...then when I need to use the speakers just mute the TV.

My RPi analogue audio has normal volume, too. It seems like only robmcc83 has such a problem.

I haven't found that option inside guisettings.xml. If you really want to force 5GHz usage, you have to compile your own version of LE.

You can try to find a channel number inside the 2.4GHz frequency band, which is not overloaded by other WLAN users (router option).

Quote from vpeter

It just shows bad forum sw or at least spam protection. I don't see as much spam on other forums I visit. There is zero spam on a most of them actually.

Yes, I've never seen that much spam in other forums, too. Maybe LE is a threat for Chinese settop box companies.

Quote from CvH

I am already in creating blocklists for that Chinese symbols, sadly thats pretty difficult

Good man. I've been suggested that a while ago, too. That Chinese spam is a pain in the ass.