我最近買了一台安裝了 Ubuntu 20.04 的 Dell XPS 13。到目前為止，我經歷了一次很棒的經歷，但有一件非常奇怪的事情我無法弄清楚。有時登入時會發出聲音，有時則不會。我沒有註意到某種模式，有時它會連續幾天不播放。我很困惑，希望得到有關如何解決此問題的任何建議。我不確定有關我的系統的哪些資訊會有幫助，所以請詢問。
我設法找到的一件有用的事情是聲音檔案本身：
/usr/share/sounds/freedesktop/stereo/alarm-clock-elapsed.oga
由於它是一種警報聲音，我認為它可能與預設的日曆應用程式（與Google同步）有關，但當聲音播放時我沒有看到任何來自日曆的通知。
根據 @waltinator 的建議，該軟體包似乎是 sound-theme-freedesktop。
$ dpkg -S /usr/share/sounds/freedesktop/stereo/alarm-clock-elapsed.oga
sound-theme-freedesktop: /usr/share/sounds/freedesktop/stereo/alarm-clock-elapsed.oga
$ dpkg -L sound-theme-freedesktop
/.
/usr
/usr/share
/usr/share/doc
/usr/share/doc/sound-theme-freedesktop
/usr/share/doc/sound-theme-freedesktop/README
/usr/share/doc/sound-theme-freedesktop/changelog.Debian.gz
/usr/share/doc/sound-theme-freedesktop/copyright
/usr/share/sounds
/usr/share/sounds/freedesktop
/usr/share/sounds/freedesktop/index.theme
/usr/share/sounds/freedesktop/stereo
/usr/share/sounds/freedesktop/stereo/alarm-clock-elapsed.oga
/usr/share/sounds/freedesktop/stereo/audio-channel-front-center.oga
/usr/share/sounds/freedesktop/stereo/audio-channel-front-left.oga
/usr/share/sounds/freedesktop/stereo/audio-channel-front-right.oga
/usr/share/sounds/freedesktop/stereo/audio-channel-rear-center.oga
/usr/share/sounds/freedesktop/stereo/audio-channel-rear-left.oga
/usr/share/sounds/freedesktop/stereo/audio-channel-rear-right.oga
/usr/share/sounds/freedesktop/stereo/audio-channel-side-left.oga
/usr/share/sounds/freedesktop/stereo/audio-channel-side-right.oga
/usr/share/sounds/freedesktop/stereo/audio-test-signal.oga
/usr/share/sounds/freedesktop/stereo/audio-volume-change.oga
/usr/share/sounds/freedesktop/stereo/bell.oga
/usr/share/sounds/freedesktop/stereo/camera-shutter.oga
/usr/share/sounds/freedesktop/stereo/complete.oga
/usr/share/sounds/freedesktop/stereo/device-added.oga
/usr/share/sounds/freedesktop/stereo/device-removed.oga
/usr/share/sounds/freedesktop/stereo/dialog-information.oga
/usr/share/sounds/freedesktop/stereo/dialog-warning.oga
/usr/share/sounds/freedesktop/stereo/message-new-instant.oga
/usr/share/sounds/freedesktop/stereo/message.oga
/usr/share/sounds/freedesktop/stereo/phone-incoming-call.oga
/usr/share/sounds/freedesktop/stereo/phone-outgoing-busy.oga
/usr/share/sounds/freedesktop/stereo/phone-outgoing-calling.oga
/usr/share/sounds/freedesktop/stereo/service-login.oga
/usr/share/sounds/freedesktop/stereo/service-logout.oga
/usr/share/sounds/freedesktop/stereo/suspend-error.oga
/usr/share/sounds/freedesktop/stereo/trash-empty.oga
/usr/share/sounds/freedesktop/stereo/audio-channel-mono.oga
/usr/share/sounds/freedesktop/stereo/dialog-error.oga
/usr/share/sounds/freedesktop/stereo/network-connectivity-established.oga
/usr/share/sounds/freedesktop/stereo/network-connectivity-lost.oga
/usr/share/sounds/freedesktop/stereo/power-plug.oga
/usr/share/sounds/freedesktop/stereo/power-unplug.oga
/usr/share/sounds/freedesktop/stereo/screen-capture.oga
/usr/share/sounds/freedesktop/stereo/window-attention.oga
/usr/share/sounds/freedesktop/stereo/window-question.oga