Catcrafts/fp6-img
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Catcrafts builds of the postmarketos image for the fairphone 6
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Filename Latest commit message Latest commit date
Jorijn van der Graaf 6ecc1dc87b fp6-vendor-blobs: ship a systemd preset so the unit stays enabled 
The package installs a multi-user.target.wants symlink, but that alone does
not survive image build: pmbootstrap runs systemctl preset-all, which removes
manually-installed .wants links for any unit whose preset does not enable it.
The 2026-08-24 image therefore shipped the service as
'disabled; preset: disabled' and it never ran, so aw88261_acf.bin was never
extracted from the stock vendor partition and a fresh install came up with no
sound card at all.

Reproduced and verified on the dev phone: with no preset file installed,
systemctl preset leaves the unit disabled; with it, the unit comes back enabled
and stays enabled across a full preset-all.

Investigation and evidence: fp6 repo journal/blobs/, 2026-08-28.

Assisted-by: Claude:claude-fable-5
2026-08-28 00:57:56 +02:00
.forgejo/workflows 112 tested 2026-08-18 15:20:55 +02:00
aports fp6-vendor-blobs: ship a systemd preset so the unit stays enabled 2026-08-28 00:57:56 +02:00
.gitignore
build.sh aports: extract aw88261_acf.bin on-device instead of shipping it 2026-08-24 21:00:34 +02:00
install.sh text change 2026-08-18 15:19:30 +02:00
README.md readme 2026-08-18 18:45:58 +02:00

README.md

fp6-img

Flashable postmarketOS images for the Fairphone 6/6+, built nightly from the Catcrafts milos-linux combined-stable kernel branch, with imsd (userspace VoLTE) preinstalled.

Maintained by Jorijn van der Graaf (TheMightyCat) at Catcrafts.

What works

Everything on the combined-stable branch: display, touch, wifi, cellular data, NFC (reader), speaker audio, microphone, IMU, magnetometer, barometer, ambient light/proximity — plus VoLTE calls (both directions) through imsd.

Verified on exactly one device / one carrier (KPN NL). Reports from other carriers are very welcome.

Flashing

Download fp6-img.tar.xz from the latest release and unlock the bootloader (Fairphone's official process).

Install: with the phone in fastboot mode,

tar xf fp6-img.tar.xz
cd fp6-img
./install.sh

install.sh erases dtbo, flashes the rootfs, RAM-boots the kernel, writes the boot partition from inside Linux where the bootloader's NV-wipe cannot see it, then reads the modem NV back and reports the result. The bootloader never writes boot.

Default login: user / 147147 (same as official postmarketOS images — change it). Never re-lock the bootloader with a custom image installed.

VoLTE configuration

imsd is installed but needs your carrier's P-CSCF address:

# /etc/imsd.env
PCSCF=<your carrier's P-CSCF IPv6 address>

Find it in a stock-firmware capture or your carrier's IMS documentation, then systemctl restart imsd (the service is enabled at boot and waits for this file to exist). See the imsd README for the full variable reference and carrier assumptions.

How it builds

build.sh drives pmbootstrap with the aports/ overlay in this repository:

  • device/linux-postmarketos-qcom-milos — the pmaports kernel aport, repointed at combined-stable with the exact kernel config the development FP6 runs.
  • modem/imsd — imsd, packaged from source. Its provides=81voltd keeps the conflicting modem-firmware IMS helper off the image (two IMS stacks cannot share one PDN).
  • main/postmarketos-config-nftables — adds the -imsd subpackage accepting imsd's IPsec-protected SIP ports on the IMS PDN (auto-installed alongside imsd).
  • device/catcrafts-fp6-repo — subscribes the installed system to the Catcrafts apk registry (signing key + /etc/apk/repositories entry). CI publishes every built package there, so apk upgrade delivers kernel/imsd/GNSS updates between image releases.