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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 236015ef36 Some checks failed image / image (push) Has been cancelled Details libcamera: af: re-baseline the scene reference after a sweep (r5) Hardware finding from the first r4 run on the phone: the focus-loss detector compared the settled scene against the maximum sharpness recorded during the sweep, which was measured under a different AGC state. On the FP6 that maximum read 4848088 and the same position two stats frames later read 1995445, so the detector fired immediately and the lens swept forever. Patch 0014 takes the reference after the lens settles and requires four consecutive out-of-band frames. Verified on the phone: r4 re-swept without end, r5 completes one sweep and stays put.		2026-08-17 02:35:59 +02:00
.forgejo/workflows	compressed single artifact	2026-08-10 16:22:20 +02:00
aports	libcamera: af: re-baseline the scene reference after a sweep (r5)	2026-08-17 02:35:59 +02:00
.gitignore	gitignore dist/; fix empty then-branch (sh syntax) in the NV verdict	2026-08-09 02:44:39 +02:00
build.sh	build: retry the source-fetching pmbootstrap steps	2026-08-16 18:08:17 +02:00
install.sh	compressed artifcats	2026-08-10 10:40:50 +02:00
README.md	readme	2026-08-14 23:12:04 +02:00

README.md

fp6-img

Flashable postmarketOS images for the Fairphone 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.

Caution

Emergency calling is unverified. Calls (including 112/911) go through imsd, whose emergency path is spec-shaped but has never been verified against a live network.

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.