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fix(packaging): autoload vhci-hcd and open its attach files for the usbip Deck pad

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Steam Input only adopts the virtual Steam Deck controller when it arrives as
a real USB device (raw_gadget or usbip/vhci transports); the UHID fallback
has no USB interface and Steam ignores it. On a stock host neither
precondition for usbip held: vhci-hcd isn't loaded, and its sysfs
attach/detach files are root-only while the host runs as a user service —
so every session silently fell back to UHID and 'no controller appears on
the host' (live-debugged 2026-07-08: client events all arrived, the pad
existed, Steam just refused it).

Ship both preconditions with the host packages:
 * modules-load.d/punktfunk.conf loads vhci-hcd at boot (rpm/deb/arch;
   Bazzite gets it via the RPM payload + a modprobe in the sysext
   post-merge hook)
 * a udev rule in 60-punktfunk.rules grants the input group write on
   vhci_hcd's attach/detach whenever the device appears

Verified end-to-end on a live host: usbip in-process attach, hid-steam
binds all three interfaces, 'Steam Deck' + motion evdev appear, and Steam
adopts the pad (client-mode grab + its own virtual X360 emission).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Enrico Bühler
2026-07-08 10:50:19 +02:00
parent 5042ffd935
commit b8fd652cb8
6 changed files with 28 additions and 0 deletions
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packaging/rpm/punktfunk.spec
+5
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@@ -195,6 +195,10 @@ install -Dm0755 target/release/punktfunk-host %{buildroot}%{_bindir}/punktfunk-h
# udev rule — /dev/uinput access for virtual gamepads (input group).
install -Dm0644 scripts/60-punktfunk.rules %{buildroot}%{_udevrulesdir}/60-punktfunk.rules
# vhci-hcd autoload — the usbip transport that makes the virtual Steam Deck controller a
# real USB device (Steam Input only adopts those; the UHID fallback is invisible to Steam).
install -Dm0644 scripts/punktfunk-modules.conf %{buildroot}%{_prefix}/lib/modules-load.d/punktfunk.conf
# UDP socket-buffer tuning (32 MB) — without it the kernel clamps the host's SO_SNDBUF to ~416 KB
# and high-bitrate frames overflow it (send-side loss). systemd-sysctl applies it at boot.
install -Dm0644 scripts/99-punktfunk-net.conf %{buildroot}%{_prefix}/lib/sysctl.d/99-punktfunk-net.conf
@@ -309,6 +313,7 @@ install -Dm0644 web/web.env.example %{buildroot}%{_datadir}/punkt
%{_bindir}/punktfunk-host
%{_bindir}/punktfunk-tray
%{_udevrulesdir}/60-punktfunk.rules
%{_prefix}/lib/modules-load.d/punktfunk.conf
%{_prefix}/lib/sysctl.d/99-punktfunk-net.conf
%{_prefix}/lib/firewalld/services/punktfunk-gamestream.xml
%{_prefix}/lib/firewalld/services/punktfunk-native.xml