readme change

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

README.md

@@ -14,10 +14,7 @@ Maintained by [Jorijn van der Graaf](https://catcrafts.net/about)
 
 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.
+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
 
@@ -53,22 +50,3 @@ Find it in a stock-firmware capture or your carrier's IMS documentation, then
 file to exist). See the
 [imsd README](https://forgejo.catcrafts.net/Catcrafts/imsd) for the full
 variable reference and carrier assumptions.
-
-## How it builds
-
-`build.sh` drives [pmbootstrap](https://gitlab.postmarketos.org/postmarketOS/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](https://forgejo.catcrafts.net/Catcrafts/-/packages)
-  (signing key + `/etc/apk/repositories` entry). CI publishes every built
-  package there, so `apk upgrade` delivers kernel/imsd/GNSS updates between
-  image releases.

aports/device/fp6-vendor-blobs/APKBUILD

@@ -25,6 +25,7 @@ options="!check"
 source="
 	fp6-vendor-blobs-extract
 	fp6-vendor-blobs.service
+	fp6-vendor-blobs.preset
 "
 
 package() {
@@ -38,10 +39,18 @@ package() {
 	mkdir -p "$pkgdir"/etc/systemd/system/multi-user.target.wants
 	ln -s /usr/lib/systemd/system/fp6-vendor-blobs.service \
 		"$pkgdir"/etc/systemd/system/multi-user.target.wants/fp6-vendor-blobs.service
+	# ...and a preset, because the symlink alone does NOT survive: image
+	# build runs `systemctl preset-all`, which removes .wants links for any
+	# unit not enabled by a preset. That is what shipped the 2026-08-24
+	# image with the service `disabled; preset: disabled` -- no blob
+	# extracted, no sound card. See journal/blobs/ 2026-08-28.
+	install -Dm644 "$srcdir"/fp6-vendor-blobs.preset \
+		"$pkgdir"/usr/lib/systemd/system-preset/50-fp6-vendor-blobs.preset
 	mkdir -p "$pkgdir"/usr/share/fp6-vendor-blobs/manifest.d
 }
 
 sha512sums="
 a71b2c86f980734d0aae6e135b26272fe52ae5603050bea52f55f7e74c8bd98c62b6194047711248d4fef40851792adc47d77c40016d99a0d68ecd2459894b80  fp6-vendor-blobs-extract
 e2c03e5016f1848c57e6160ce432530b181ff5d34a5aaf1822f0ffa5fe71d16691657ada4a5789c4d4209e14e83f43aab072d01f644b07b93648f91e2a7bb0ca  fp6-vendor-blobs.service
+9e79dd0aed13f11a71282aa24b2a26331e85c105e25ab0c0fed6189b8c300769a5f4308b18b91d9855868d658ad3a57c03e26c9b11bd27fd5e03f9a5decbbd6a  fp6-vendor-blobs.preset
 "

aports/device/fp6-vendor-blobs/fp6-vendor-blobs.preset

@@ -0,0 +1,7 @@
+# The package also ships the multi-user.target.wants symlink, but a
+# `systemctl preset-all` (pmbootstrap runs one while building the image)
+# strips manually-installed .wants links for any unit whose preset does not
+# enable it -- which left the service `disabled; preset: disabled` in the
+# 2026-08-24 image and so no aw88261_acf.bin and no sound card on a fresh
+# install. This preset is what makes the enable survive that.
+enable fp6-vendor-blobs.service