799a5d5467
The mpv service inherited Kodi's VT-grabbing block (PAMName=login + StandardInput=tty + TTYPath=/dev/tty1). Opening a "login" PAM session on tty1 hangs in systemd's pre-exec setup, so mpv was never exec'd at all -- the service sat "running" as systemd-executor with an empty (mpv) cmdline, no IPC socket, no output. Two fixes: 1. Simplify the unit. mpv doesn't need a login session or the tty: as the sole DRM client on the seat it becomes DRM master implicitly on first open, so plain video+render+audio group membership is enough. Removing the PAM/tty block lets mpv actually start, initialize the vc4 KMS display, and play (verified end-to-end: play/status/next through the Flask API, position advancing on screen). 2. install.sh now tears down any leftover Kodi before starting mpv. The real trigger this time was an in-place migration: replacing the unit files doesn't stop an already-running Kodi, which kept DRM master and the tty1 seat and blocked mpv from ever getting the display. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
39 lines
1.5 KiB
Text
39 lines
1.5 KiB
Text
[Unit]
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Description=mpv video player (KMS/DRM -- the actual player)
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# Needs the DRM/HDMI + sound devices present.
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After=local-fs.target systemd-udev-settle.service sound.target
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Wants=systemd-udev-settle.service
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# Keep a login getty off the primary display so nothing else claims tty1.
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Conflicts=getty@tty1.service
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[Service]
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User=${MEDIAPI_USER}
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# mpv on KMS/DRM needs: video+render (GPU/DRM), input (remotes/keyboard), audio
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# (HDMI/ALSA). It becomes DRM master simply as the first/only DRM client on the
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# seat -- no PAM login session and no elevated capabilities required, provided
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# nothing else is already holding the GPU. (An older Kodi-based deploy DID hold
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# it; install.sh tears any leftover Kodi down before starting this.)
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SupplementaryGroups=video render input audio
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# Create /run/mediapi (owned by this user) for the IPC socket the app connects to.
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RuntimeDirectory=mediapi
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StandardInput=null
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StandardOutput=journal
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StandardError=journal
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# --idle keeps mpv running with no file loaded (holds the playlist between clips
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# and after the last one), so the service stays up and the app can always reach
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# the socket. Playback renders straight on KMS.
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ExecStart=/usr/bin/mpv \
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--idle=yes \
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--input-ipc-server=/run/mediapi/mpv.sock \
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--no-terminal \
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--no-input-default-bindings \
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--fullscreen \
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--force-window=yes \
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--keep-open=no \
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--vo=gpu --gpu-context=drm --hwdec=auto \
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--ao=alsa --audio-device=alsa/hdmi:CARD=vc4hdmi0,DEV=0
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Restart=on-failure
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RestartSec=5
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[Install]
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WantedBy=multi-user.target
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