enricobuehler
0b1322d1c6
The host requests a 32 MB SO_SNDBUF, but the kernel clamps it to net.core.wmem_max (~416 KB on a stock box) — so high-bitrate frames overflow the socket buffer and the host drops a large fraction of packets on send (measured 28.5% loss / 54k dropped at 1 Gbps to a clean LAN client on a fresh Bazzite box). scripts/99-punktfunk-net.conf fixes it (32 MB caps) but the packages never installed it. Ship it to /usr/lib/sysctl.d/ (auto-applied at boot by systemd-sysctl) and apply it in the deb/rpm postinst. This is the dominant cause of the sub-Gbps ceiling on an untuned host. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
punktfunk-host — Debian/Ubuntu package (apt)
punktfunk-host is published as a .deb to Gitea's Debian package registry in the public
unom org, so the Ubuntu hosts update with plain apt. CI (.gitea/workflows/deb.yml) builds
and publishes on every push to main (a rolling 0.0.1~ciN.<sha> build) and on v* tags
(a clean X.Y.Z).
Package layout mirrors the Fedora RPM (../rpm/punktfunk.spec): the host binary, the /dev/uinput
udev rule, the systemd user unit, headless session helpers, the example config, and the OpenAPI
doc. Runtime Depends are computed by dpkg-shlibdeps from the binary itself (built in the Ubuntu
26.04 rust-ci image, so the lib soname package names match the target). The NVIDIA driver
(libnvidia-encode / libEGL_nvidia / libcuda) is not a dependency — it's installed out of
band, like on the RPM side.
Install on a host (one-time)
The registry is public, so no apt auth is needed — just trust the repo's signing key:
sudo install -d -m 0755 /etc/apt/keyrings
curl -fsSL https://git.unom.io/api/packages/unom/debian/repository.key \
| sudo tee /etc/apt/keyrings/punktfunk.asc >/dev/null
echo "deb [signed-by=/etc/apt/keyrings/punktfunk.asc] https://git.unom.io/api/packages/unom/debian stable main" \
| sudo tee /etc/apt/sources.list.d/punktfunk.list
sudo apt update
sudo apt install punktfunk-host
Then, as the desktop user:
sudo usermod -aG input "$USER" # virtual gamepads (re-login to take effect)
mkdir -p ~/.config/punktfunk
cp /usr/share/punktfunk-host/host.env.example ~/.config/punktfunk/host.env # then edit
systemctl --user enable --now punktfunk-host
Updates
sudo apt update && sudo apt upgrade # picks up the newest published build
systemctl --user restart punktfunk-host # if the unit was already running
Build a .deb locally
VERSION=0.0.1 bash packaging/debian/build-deb.sh # -> dist/punktfunk-host_0.0.1_amd64.deb
Needs dpkg-dev (dpkg-shlibdeps, dpkg-deb). It builds the release binary first if missing.
Build it in the rust-ci image (or on an Ubuntu 26.04 box) so the resolved Depends match the
hosts; building on a GPU box is fine — the NVIDIA driver lib is filtered out either way.