Ubuntu 21.04 を USB マイクを接続した状態で実行すると、pulseaudio は起動に失敗します。ただし、Ubuntu 21.04 を USB なしで実行すると、pulseaudio は正常に起動し、システムの起動後に USB を接続した状態でも正常に動作します。
pulseaudio の起動に失敗したときの journalctl からのログ メッセージ:
-- Boot 37de7028dfda47569d03504658160650 --
Dec 11 04:46:09 hirsute-server systemd[1958]: Starting Sound Service...
Dec 11 04:46:10 hirsute-server pulseaudio[1967]: No such profile: output:hdmi-stereo
Dec 11 04:46:10 hirsute-server pulseaudio[1967]: Failed to initialize daemon due to errors while executing startup commands. Source of commands: /etc/pulse/>
Dec 11 04:46:10 hirsute-server systemd[1958]: pulseaudio.service: Main process exited, code=exited, status=1/FAILURE
Dec 11 04:46:10 hirsute-server systemd[1958]: pulseaudio.service: Failed with result 'exit-code'.
Dec 11 04:46:10 hirsute-server systemd[1958]: Failed to start Sound Service.
Dec 11 04:46:10 hirsute-server systemd[1958]: pulseaudio.service: Scheduled restart job, restart counter is at 1.
Dec 11 04:46:10 hirsute-server systemd[1958]: Stopped Sound Service.
Dec 11 04:46:10 hirsute-server systemd[1958]: Starting Sound Service...
Dec 11 04:46:11 hirsute-server pulseaudio[2087]: No such profile: output:hdmi-stereo
Dec 11 04:46:11 hirsute-server pulseaudio[2087]: Failed to initialize daemon due to errors while executing startup commands. Source of commands: /etc/pulse/>
Dec 11 04:46:11 hirsute-server systemd[1958]: pulseaudio.service: Main process exited, code=exited, status=1/FAILURE
Dec 11 04:46:11 hirsute-server systemd[1958]: pulseaudio.service: Failed with result 'exit-code'.
Dec 11 04:46:11 hirsute-server systemd[1958]: Failed to start Sound Service.
Dec 11 04:46:11 hirsute-server systemd[1958]: pulseaudio.service: Scheduled restart job, restart counter is at 2.
何かアイデアはありますか? さらに情報が必要な場合は、遠慮なくお知らせください。