97 lines
3.8 KiB
Markdown
97 lines
3.8 KiB
Markdown
Personal Gentoo overlay, focusing mostly on needed tools and
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compatibility for a libre version of Gentoo on the Librem 14 computer.
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Available packages:
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- **sys-kernel/libre-kernel**: A dist-kernel built from the [Linux-libre
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sources][linux-libre].
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- **media-fonts/fonts-meta**: Modified version to remove non-Free
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fonts from the dependencies.
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- **sys-kernel/librem-ec-acpi**: An ebuild packaging the [Librem 14
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EC ACPI kernel module][ec-acpi], necessary for proper functioning
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of the laptop's battery charging and function keys.
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* **sys-power/librem-control**: A GTK application to control
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parameters of the Librem EC (battery charge levels, etc).
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* **sys-firmware/purism_ectool**: Tool for querying and flashing
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Purism EC firmware images on certain Librem laptops.
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## How to Add This Repository
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Using eselect-repository:
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```
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# eselect repository add projectmoon git https://git.agnos.is/projectmoon/projectmoon-overlay
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```
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## The Linux-libre dist-kernel
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This overlay provides a dist-kernel (based on
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`sys-kernel/vanilla-kernel`) using the Linux-libre kernel sources, and
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an accompanying updated version of `virtual/dist-kernel`. It is
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maintained and tested for my personal use on amd64. The Linux-libre
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kernel removes the ability for the Linux kernel to load firmware that
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is not [Free Software][free-software]. The ebuild roughly follows the
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current stable gentoo-kernel for amd64.
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The libre kernel can be installed alongside other dist-kernels, and
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works with the `dist-kernel` and `initramfs` USE flags. The ebuild
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does NOT fail if non-free firmware (i.e. `sys-kernel/linux-firmware`
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with `redistributable` USE flag set) is installed, but it will warn
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you if this is the case. It will also warn you if the `linux-firmware`
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package is not found at all, like normal dist-kernel ebuilds.
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The kernel installed by this ebuild has the version suffix
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`-gnu-dist`, making it easy to determine which kernel it is.
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To install only the Linux firmware that meets the [Free Software
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Definition][free-software], configure `/etc/portage/package.use`
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accordingly:
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```
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# Install only libre firmware
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sys-kernel/linux-firmware -redistributable -unknown-license
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```
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You can also edit `/etc/portage/profile/package.use.mask` to prevent
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the linux-firmware package from ever installing the closed-source
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firmware by adding this line:
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```
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# forcibly stop non-free firmware installation
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sys-kernel/linux-firmware redistributable unknown-license
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```
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## Using the Librem EC ACPI kernel module
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The Librem EC ACPI kernel module should install and be automatically
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available (via modprobe) after installation, using `emerge
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sys-kernel/librem-ec-acpi`. The module is currently installed to
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`/lib/modules/<kernel>/librem/`.
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This ebuild supports the `dist-kernel` USE flag, and the module will
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automatically be rebuilt when installing a new dist-kernel if that
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flag is enabled.
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If you are not using a dist-kernel, when upgrading or installing a new
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kernel, you will need to do `emerge @modules-rebuild` to install the
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module for the new kernel.
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### Librem Control and the Purism EC Tool
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These two appliations can be used to manipulate device-specific
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features of the Librem 14, including the flashing of firmware images.
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It is not recommended to use the EC tool from this overlay for
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flashing a firmware image. Instead, follow the official [firmware
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flashing instrutions][ec-instructions].
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# Disclaimer
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The ebuilds in this overlay are really only tested for my specific
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use-case. I do not test every combination of USE flags, for example.
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So there may be issues with non-Free dependencies etc in some cases.
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[linux-libre]: https://www.fsfla.org/ikiwiki/selibre/linux-libre/
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[free-software]: https://www.gnu.org/philosophy/free-sw.en.html#fs-definition
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[ec-acpi]: https://source.puri.sm/nicole.faerber/librem-ec-acpi-dkms
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[ec-instructions]: https://puri.sm/projects/librem-ec/
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