Word of advice: do not do this to any device that you actually depend on. Linux enthusiasm is all fine and fun, but this will kill most practical functionality of your device. I’d say try it out on a old phone you might have laying around but not on your daily driver.
lol after being exposed to it a bit because gitlab.com I’ve decided it’s my best font forever <3 I’ve configured it everywhere a monospaced font is used including gitk and termux on my phone hahaha so cool
If I’m not mistaken, I believe the 2018 J3 has a locked bootloader. The fact that I can’t find even a SINGLE custom ROM on XDA for this model means it’s highly likely that the bootloader is locked, and/or the device isn’t dev friendly (no kernel sources available etc).
so I guess doing the same on my smartphone wouldn’t be too hard.
Mate, you’ve no idea… Smartphones are a completely different ball game to desktops. You could try and compile your distro, but without the kernel sources and drivers for your specific model, nothings gonna work. You won’t even be able to boot the damn thing. And even if you did have those, it’s going to take a LOT of effort just to get basic OS functionality working. Forget getting actual phone stuff working, like making calls etc - that’s next to impossible. Even large projects like PostmarketOS struggle to get basic functionality going even on dev-friendly phones.
But you can stop dreaming about all the above if you can’t even unlock the bootloader.
Basically, what all this means is that there’s no point wasting your time on the J3. Stop right now and don’t waste any further time on this.
If you’d really like to run GrapheneOS / Linux on your phone, your best option is to sell your J3, and get a used Google Pixel from Swappa/eBay or something.
To be fair they’re ARM-based devices (most of them anyway) and linux works fine onthat architecture. The Raspberry Pi and others, Microsoft has Windows on ARM; as do the new M-series from Apple.
It’s all the obscure hardware, bootloading and vendor lock-in that kills it.
I got an off-lease dell latitude 7400. Tbh, got it for free, but you can snag one on eBay for under $400. i5, 16 Gb ram, got a 1TB drive for $50 on Amazon. Runs Linux very well! I’d go with a light weight is like EndeavourOS or Arch.
If it runs Windows it’ll run Linux almost certainly. The cheaper you go, the more likely you’ll have lower priced or older components for WiFi, Bluetooth etc which may mean that you have to dig some firmware binaries out to get the whole thing running.
If you can take a USB stick with you of a typical Rescue distribution, and can boot it up, you’ll know what will and won’t work easily. The bits that don’t work may need some minor fiddling. As I said, there are usually walkthrough blogs etc around.
If you reinstall often a separate /home makes some sense. Otherwise it’s probably pointless. I’d try to get to a point where I don’t have to reinstall my base OS and invest in an automatic backup solution.
Have you installed a custom ROM on it? If not, you definitely don’t have the skills for this. If so, have you built your own ROM for it? If not, do that so you learn how it works in a predictable environment. Then port something existing to it, like UBPorts. Only after you do all of that and probably a lot more should you attempt to effectively develop your own distro on hostile hardware.
If you care about VRR or HDR, you need a distro with KDE Plasma and use a Wayland session. Plus, you’ll need the latest drivers, so… a rolling release.
Arch based like Manjaro, or OpenSUSE.
If you don’t like that, or you have an NVIDIA GPU then I suggest you try Nobara, made by Glorious Eggroll, big contributor to Proton (Valve’s fork of Wine, what makes Windows games run on Linux).
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