No sound

[hilaire]

On a Ubuntu 19.10 workstation with working sound (rhythmbox, vlc, firefox), sound is not working with Flightgear. It looks like something is wrong wth Alsa (/usr/share/alsa/alsa.conf file is present, uncorrupted on the system):

hilaire@PCHome:~$ flightgear --show-sound-devices
    0.00 [INFO]:general FlightGear: Version 2019.1.2
    0.00 [INFO]:general FlightGear: Build Type Dev
    0.00 [INFO]:general Built with GNU C++ version 7.4
    0.00 [INFO]:general Jenkins number/ID 0:none
    0.00 [INFO]:sound Initializing OpenAL sound manager
ALSA lib conf.c:3916:(snd_config_update_r) Cannot access file /usr/share/alsa/alsa.conf
ALSA lib pcm.c:2495:(snd_pcm_open_noupdate) Unknown PCM default
AL lib: (EE) ALCplaybackAlsa_open: Could not open playback device 'default': No such file or directory
unknown provided by unknown

No. Device
    0.04 [ALRT]:sound Error: Default audio device not available.
0. "ALSA Default"