我的启动时间很慢，并且出现了一个特定错误，耗费了 30 多秒的时间。
版本：
$ uname -v -r
4.4.0-64-generic #85-Ubuntu SMP Mon Feb 20 11:50:30 UTC 2017
错误：
Mar 5 17:24:03 InFlames systemd[1]: Stopped Read required files in advance.
Mar 5 17:24:03 InFlames systemd[1]: Started Stop ureadahead data collection.
Mar 5 17:24:31 InFlames gnome-session[1994]: (gnome-software:2129): 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
Mar 5 17:24:31 InFlames gnome-session[1994]: message repeated 3 times: [ (gnome-software:2129): 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]
- 我们怎样才能开始解决这个问题？
- 什么是GDbus？