ArmbianHelper changed the topic of #armbian to: armbian - Linux for ARM development boards | www.armbian.com | Github: github.com/armbian | Commits: #armbian-commits | Developer talk: #armbian-devel | Forum feed: #armbian-rss | Off-Topic: #armbian-offtopic | Logs: -> irc.armbian.com
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<DC-IRC>
<marty1938> Hi! I would like to customize an image which works great! using customize-image. I want to add a user when customizing the image, it seems like the home directory is not created.
<DC-IRC>
<marty1938> Am i missing something? is it possible to do?
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<DC-IRC>
<marty1938> Hi! I would like to customize an image which works great! using customize-image. I want to add a user when customizing the image, it seems like the home directory is not created.
<DC-IRC>
<nottoosmart> W: GPG error: http://armbian.tnahosting.net/apt bookworm InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 93D6889F9F0E78D5
<DC-IRC>
<nottoosmart> E: The repository 'http://apt.armbian.com bookworm InRelease' is not signed.
<DC-IRC>
<nottoosmart> N: Updating from such a repository can't be done securely, and is therefore disabled by default.
<DC-IRC>
<nottoosmart> N: See apt-secure(8) manpage for repository creation and user configuration details.`
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<DC-IRC>
<nottoosmart> neverming the apt issue, figured it out through another method of searching.
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<DC-IRC>
<grohlfer> Hello people!
<DC-IRC>
<grohlfer> I'm a little new to armbian, though having worked with Linux for quite some time in the past.
<DC-IRC>
<grohlfer> Now that I have some spare time to fill up, I wanted to catch up with IoT and got myself a couple of SBC boards (OrangePi3-LTS and RaspberryPi4-B).
<DC-IRC>
<grohlfer> I've already succeed in many experiments using GPIO on the OPi3-LTS, and now I'm trying to do some more, this time using its SPI capabilities.
<DC-IRC>
<grohlfer> Problem is that I can't quite understand Device Trees overlays. I've been googling for it and all information I got seems to assume that you already know about it.
<DC-IRC>
<grohlfer> Besides that, some boot-up overlay examples written to a file with extension .txt in the /boot directory sometimes use "overlays=" and others use "dtoverlay=". Likewise, ones refer to parameters by "params=" and others "dtparam=". My conclusion is that at some point in time the DT boot-up directives changed from one to another, and that not every Linux distro has this file available. Am I right?
<DC-IRC>
<grohlfer> I also have watched a good 1hr video about Device Trees from Thomas Petazzoni from Bootlin, but he fell short from tackling boot-up modifications on the DT as well.
<DC-IRC>
<grohlfer> I'm a little frustrated because so far I couldn't find anything more elucidative about modifying DTs on kernel bootup.
<DC-IRC>
<grohlfer> I'd appreciate any suggestions coming from you, guys.
<DC-IRC>
<grohlfer> Thanks!
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<DC-IRC>
<viraniac> @grohlfer You seem to be strugling with two different things. first is to understand and write device tree overlays, second is how they get applied. For the first part, I will suggest to go over bootlin blog. They have some nice articles explaining the same. You can easily find them if you google for "dt overlay bootlin". For the second part, about how they are applied, they are <clipped message>
<DC-IRC>
<viraniac> generally applied before the control is passed to kernel. This is generally done by the bootloader. What identifiers (dtoverlay, dtparam, overlays, etc) you have to use to apply them, depends on the implementation for the same. For example, raspberry pi has its own implementation done in its firmware and you tell the firmware to load specific dt overlays using dtoverlay parameter <clipped message>
<DC-IRC>
<viraniac> and if you need to pass some information to it, you use dtparam parameter. On the other hand, if you try this on OrangePi3-LTS running Armbian, you have to use overlays parameter as the bootscript (/boot/boot.scr) expects the same.
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<DC-IRC>
<viraniac> So basically it all boils down to a simple, refer to the documentation of OS and device that you are using for how to load the device overlay.
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<DC-IRC>
<grohlfer> Thank you @viraniac , you got precisely what I'm struggling with! I'll follow your tips, in fact I've had taken some videos from bootlin already. But now that you explained about the differences from RPi and OPi bootload DT modification directives, I'm more confident about how to deal with it without messing (too much, I hope) things up on my SBC. Thank you so much!
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