aproman 0.1.1

Fix HDMI audio after suspend/resume on PipeWire + WirePlumber

aproman

Fix HDMI audio after suspend/resume on Linux systems running PipeWire + WirePlumber.

The Problem

When a Linux system resumes from suspend, HDMI audio devices often lose their connection. WirePlumber tries to link to stale node proxies, resulting in silence. The only manual fix is to open your audio settings and switch the card profile away (for example to off) and back, forcing a full teardown and rebuild of the audio nodes.

How It Works

aproman runs as a user systemd service and:

1. Auto-detects your HDMI audio card, or accepts one via --card
2. Monitors D-Bus for PrepareForSleep signals from systemd-logind
3. On wake, waits briefly for HDMI to renegotiate, then cycles the card profile off and back on

This forces PipeWire and WirePlumber to rebuild fresh nodes, restoring audio without manual intervention.

Requirements

• PipeWire with WirePlumber, or PulseAudio compatibility via PipeWire
• pactl
• dbus-monitor
• systemctl
• A systemd-based Linux distribution

Installation

Recommended: uv

uv tool install aproman

This installs aproman to ~/.local/bin/.

Then install and start the systemd service:

git clone https://github.com/mwolson/aproman.git
cd aproman
mkdir -p ~/.config/systemd/user
cp systemd/aproman.service ~/.config/systemd/user/
systemctl --user daemon-reload
systemctl --user enable --now aproman.service

Alternative: install.sh

git clone https://github.com/mwolson/aproman.git
cd aproman
./install.sh
systemctl --user start aproman.service

This copies aproman to ~/.local/bin/ and installs and enables the user service.

Usage

The service runs automatically. To check status:

systemctl --user status aproman.service
journalctl --user -u aproman.service -f

Command-Line Options

You can customize behavior by editing the ExecStart line in the service file:

--card CARD_NAME       PipeWire/PulseAudio card name (default: auto-detect HDMI card)
--profile PROFILE      Desired audio profile (default: active profile on startup)
--wake-delay SECONDS   Seconds to wait after wake before cycling (default: 3.0)

To find your card name:

pactl list cards short

Example: Custom Card and Profile

Edit ~/.config/systemd/user/aproman.service:

ExecStart=%h/.local/bin/aproman --card alsa_card.pci-0000_01_00.1 --profile output:hdmi-stereo

Then reload and restart:

systemctl --user daemon-reload
systemctl --user restart aproman.service

Uninstall

systemctl --user disable --now aproman.service
uv tool uninstall aproman  # or: rm ~/.local/bin/aproman
rm ~/.config/systemd/user/aproman.service
systemctl --user daemon-reload

Testing

python3 -m unittest discover -s tests -v

Hooks

lefthook install
lefthook run pre-commit --all-files

The pre-commit hook runs uvx ruff check, uvx ty check, and the unit test suite.

License

MIT