刚刚运行了常规软件更新，没有异常。提示我重新启动，所以我重新启动了，但一旦登录，程序就ubuntu-software“崩溃了”（窗口短暂打开，然后消失）。
重新启动了几次以确保这不是故障，并尝试从终端运行它以查看错误消息：
$ ubuntu-software
(ubuntu-software:6610): Gs-WARNING **: Failed to create permission org.freedesktop.packagekit.trigger-offline-update: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Action org.freedesktop.packagekit.trigger-offline-update is not registered
(ubuntu-software:6610): Gs-WARNING **: Failed to create permission org.freedesktop.packagekit.trigger-offline-update: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Action org.freedesktop.packagekit.trigger-offline-update is not registered
(ubuntu-software:6610): Gs-WARNING **: Failed to create permission org.freedesktop.packagekit.trigger-offline-update: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Action org.freedesktop.packagekit.trigger-offline-update is not registered
(ubuntu-software:6610): Gs-WARNING **: Failed to create permission org.freedesktop.packagekit.trigger-offline-update: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Action org.freedesktop.packagekit.trigger-offline-update is not registered
(ubuntu-software:6610): Gs-WARNING **: Failed to create permission org.freedesktop.packagekit.trigger-offline-update: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Action org.freedesktop.packagekit.trigger-offline-update is not registered
(ubuntu-software:6610): GLib-CRITICAL **: g_dir_read_name: assertion 'dir != NULL' failed
(ubuntu-software:6610): Gtk-WARNING **: Error loading image 'file:///usr/share/gnome-software/featured-inkscape.png': Error opening file: Too many open files
(ubuntu-software:6610): GLib-ERROR **: Creating pipes for GWakeup: Too many open files
Trace/breakpoint trap (core dumped)
不知道它们之间有什么关系（通常手动使用），但另一方面，apt install该程序似乎运行良好。不过令人讨厌的是，双击软件包似乎会调用；尝试这样做会打开一个带有软件包描述和“安装”按钮的窗口（像往常一样），但单击按钮会关闭该窗口。仍然可以手动安装，但最好知道为什么会发生这种情况以及如何修复它。software-center.debubuntu-softwaredpkg -i