我一直在正常使用我的电脑，直到我发现有些不对劲，然后我重新启动了它。然后我无法使用带 chrome 的 flash 浏览网页，无法从 youtube 加载 HTML5 视频。当我尝试打开 VLC 时，它说：
martin@martin-HP:~$ vlc
VLC media player 2.2.2 Weatherwax (revision 2.2.2-0-g6259d80)
[00000000016dd028] pulse audio output error: PulseAudio server connection failure: Connection refused
和声音不起作用。
当我尝试更新 apt-get 时：
** (appstreamcli:2530): WARNING **: No origin found for file fr.archive.ubuntu.com_ubuntu_dists_xenial-updates_universe_dep11_Components-amd64.yml.gz
Segmentation fault (core dumped)
Reading package lists... Error!
E: Failed to fetch store:/var/lib/apt/lists/partial/fr.archive.ubuntu.com_ubuntu_dists_xenial_main_dep11_Components-amd64.yml.gz Hash Sum mismatch
E: Failed to fetch store:/var/lib/apt/lists/partial/fr.archive.ubuntu.com_ubuntu_dists_xenial-updates_main_dep11_Components-amd64.yml.gz Hash Sum mismatch
E: Some index files failed to download. They have been ignored, …