15
Help debugging an issue with Raspberry Pi 4B boot
(sh.itjust.works)
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
this post was submitted on 29 Jul 2023
15 points (100.0% liked)
Selfhosted
39893 readers
334 users here now
A place to share alternatives to popular online services that can be self-hosted without giving up privacy or locking you into a service you don't control.
Rules:
-
Be civil: we're here to support and learn from one another. Insults won't be tolerated. Flame wars are frowned upon.
-
No spam posting.
-
Posts have to be centered around self-hosting. There are other communities for discussing hardware or home computing. If it's not obvious why your post topic revolves around selfhosting, please include details to make it clear.
-
Don't duplicate the full text of your blog or github here. Just post the link for folks to click.
-
Submission headline should match the article title (don’t cherry-pick information from the title to fit your agenda).
-
No trolling.
Resources:
- selfh.st Newsletter and index of selfhosted software and apps
- awesome-selfhosted software
- awesome-sysadmin resources
- Self-Hosted Podcast from Jupiter Broadcasting
Any issues on the community? Report it using the report flag.
Questions? DM the mods!
founded 1 year ago
MODERATORS
Sorry to hear that, booting problems suck and are horrible to debug.
The next step I would try would be to boot an other install, like a liveusb or a raspbian, on the same usb port, to completely eliminate a hardware problem if it boots properly.
If it is a software problem, it seems to happen very early in the boot process, so my bet would be a corrupted initramfs/initrd (or what is equivalent on a Pi). No idea how you could debug and fix that on Ubuntu, though (especially on a Pi where
/bootis… different). Maybe installing an other Ubuntu on an other disk or stick, then copy the boot files (making a backup of the original files to restore them if it doesn't help, no need to pile up possible causes of trouble). Throwing it here in case other people know better.Thanks for the quick reply 👍
Good advice. I moved the usb drive from another (working) PI and attached it to the same USB port. It boots correctly. It is not the USB port nor power.
I believe it is something like that. Or it is not mounting the drive correctly and not finding it, or it is something else. I just wish there was a better (or any) error printed on the console. I tried to attach a keyboard to get to a shell with no success. I honestly could just reformat the drive and use a clean install, but it is the last resource. I would like to understand what happened so I can learn from it and avoid it in the future (or learn a path to fix it).
Yes, that's what I had in mind. I already had similar problems with initramfs, because it was responsible to load the drivers needed for mounting the disk where the kernel was, so a bad initramfs caused the boot to fail from the get go failing to mount the partition.
That being said, I've looked at my Pi, and I have no idea what would serve as an initramfs in all those Pi specific files in /boot, if any. If you really want to understand what happened, I guess a possible path would be to find resources on the web explaining in details the Pi boot process, since it's different from usual linux boot process (it's not just the Pi either, I played with other ARM devices, like the stuff from pine64, and they all had their own way to boot).