VLC via telnet occasionally stops reacting

[acerot]

Hi, I'm using VLC via telnet server on Raspbian (Raspberry Pi 4). Works well but it occasionally stops reacting. Mostly overnight when nothing is being played. Please see the following CMD session - the telnet interface reacts perfectly but the player itself doesn't react on the "stop" command and "status" command still shows the same. Anyone would know how I can troubleshoot what is going on? The only thing helping is to completely shutdown the VLC session (kill processes) and reestablish it again - for that I use this command: cvlc --alsa-audio-device makemono -I telnet --telnet-password XXXXXXXX --daemon. Thx.

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> status ( new input: file:///home/acerot/qnap_hudba/vlc/relax/healing_collection/2004_hc_v/10_clear_night_in_winter.mp3 ) ( audio volume: 150 ) ( state playing ) > stop > status ( new input: file:///home/acerot/qnap_hudba/vlc/relax/healing_collection/2004_hc_v/10_clear_night_in_winter.mp3 ) ( audio volume: 150 ) ( state playing ) > clear > playlist +----[ Playlist - playlist ] | 1 - Seznam skladeb | 2 - Knihovna médií +----[ End of playlist ] > status ( new input: file:///home/acerot/qnap_hudba/vlc/relax/healing_collection/2004_hc_v/10_clear_night_in_winter.mp3 ) ( audio volume: 150 ) ( state playing ) > stop > status ( new input: file:///home/acerot/qnap_hudba/vlc/relax/healing_collection/2004_hc_v/10_clear_night_in_winter.mp3 ) ( audio volume: 150 ) ( state playing ) >

The freshly established VLC telnet server session looks like this (sudo htop):

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PID△USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command 294483 acerot 20 0 139M 15224 12496 S 0.0 0.4 0:00.09 └─ /usr/bin/vlc -I dummy --alsa-audio-device makemono -I telnet --telnet-password XXXXXXXX --daemon 294485 acerot 20 0 139M 15224 12496 S 0.0 0.4 0:00.00 ├─ /usr/bin/vlc -I dummy --alsa-audio-device makemono -I telnet --telnet-password XXXXXXXX--daemon 294486 acerot 20 0 139M 15224 12496 S 0.0 0.4 0:00.00 ├─ /usr/bin/vlc -I dummy --alsa-audio-device makemono -I telnet --telnet-password XXXXXXXX --daemon 294487 acerot 20 0 139M 15224 12496 S 0.0 0.4 0:00.00 ├─ /usr/bin/vlc -I dummy --alsa-audio-device makemono -I telnet --telnet-password XXXXXXXX--daemon 294488 acerot 20 0 139M 15224 12496 S 0.0 0.4 0:00.00 └─ /usr/bin/vlc -I dummy --alsa-audio-device makemono -I telnet --telnet-password XXXXXXXX--daemon

[Rémi Denis-Courmont]

This would typically indicate that a thread has locked up. This is most commonly caused by buggy device drivers, though sometimes VLC bugs can trigger it too. So troubleshooting boils down to debugging.