https://github.com/l-as/nixos-lazor

NixOS modules for the Acer Chromebook Spin 513 (trogdor/lazor)
https://github.com/l-as/nixos-lazor

Last synced: about 5 hours ago
JSON representation

NixOS modules for the Acer Chromebook Spin 513 (trogdor/lazor)

• Host: GitHub
• URL: https://github.com/l-as/nixos-lazor
• Owner: L-as
• License: mit
• Created: 2021-10-27T15:48:02.000Z (about 3 years ago)
• Default Branch: master
• Last Pushed: 2023-01-10T05:59:07.000Z (almost 2 years ago)
• Last Synced: 2023-03-03T18:44:11.418Z (over 1 year ago)
• Language: Nix
• Size: 28.3 KB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
# New work

https://github.com/NixOS/mobile-nixos supports sc7180 now.

If it doesn't work, contribute to it, it's a much better framework than this.

Maybe you'll even get the LTE working.

# Preparing the installation

You must first set your Chromebook to developer mode. Then you can boot

from an external storage device. You can thus prepare an external storage

device with something like the approach noted below so that you can

install onto the internal eMMC.

# Set-up

Use gptfdisk as normal, have 1 partition with type ChromeOS kernel (7F00) that is

**at least** 320 MiB in size. Unfortunately the initrd is quite big right now,

mostly due to a lack of optimization on my side.

Then, make your other partitions as usual.

I personally recommend a single partition for root using LUKS and F2FS:

```bash

cryptsetup luksFormat /dev/mmcblk1p2 --type luks2

cryptsetup luksOpen /dev/mmcblk1p2 cryptroot

mkfs.f2fs /dev/mapper/cryptroot -O extra_attr,compression,inode_checksum,sb_checksum

```

You must now make two NixOS configurations: One just for booting, and one for

your system. Respectively, one that imports `boot-kpart.nix`, and one that

imports `lazor.nix`.

When you build the boot configuration, you will get a system, which you won't

actually use. You instead use just the `kpart` file from it, and do

`sudo cp ./result/kpart /dev/mmcblk1p1`. When your laptop boots,

it will first boot this "system", that just kexecs directly into the real

system before leaving the initrd. The reason it's done this way, is

that rebuilding the `kpart` is quite expensive and annoying to do every time

you want to rebuild your system.

The other configuration will be your main configuration,

and should be configured in the standard way.

To install this onto your root filesystem, simply do

`nix-build --store /mnt`, then `nix-env -p /nix/var/nix/profiles/system --set ./result`.

The initrd in the first partition will on boot `kexec` the system you have in

`/nix/var/nix/profiles/system`.

# Tips

## Building a NixOS configuration

`nix-build '' --argstr configuration /my/config.nix`

## Image for booting from SD card or USB

`nix-build -A image`

## Sound

Use Pipewire, it works much better than PulseAudio in general.

## Root filesystem

Make "/" a `tmpfs`. This is a good practice in general.

# Known issues

- Hardware decode through `mpv --hwdec=v4l2m2m_copy` doesn't work great,

  especially seeking.

- No way to choose profile to boot (but should be easy to implement honestly)