解决WSL2中Ubuntu-22.04找不到bus的错误

古城微笑少年丶 2024-03-23 23:32 21阅读 0赞

## 项目场景： ##

对于systemd系统来说，DBUS是必不可少的工具，它是进程间通讯的桥梁。

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## 问题描述 ##

当我们在WSL2中安装QQ音乐的时候，打开崩溃，具体的提示错误是：`Failed to connect to the bus: Failed to connect to socket /run/user/1000/bus: No such file or directory`

意思就是没有/run/user/1000/bus这个文件，我们去这个目录下面确实没找到这个文件。

ls /run/user/1000/
    dbus-1  gnupg  pk-debconf-socket  pulse  snapd-session-agent.socket  systemd  wayland-0  wayland-0.lock

`简单解释下：`  
`1000`是除了`root`用户外你创建的`第一个用户ID`，第二个ID是1001。

有些软件可能能够运行，但是像QQ音乐Linux版，没有这个文件就直接崩溃或不出声音。

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## 原因分析： ##

DBUS简单理解就是用于处理进程间通讯的桥梁，用来在不同的Applications中相互传递消息。它的效率很高，很多发行版中都集成了。

有些Applications依赖这个东西，如果没有的话就不能正常运行。废话不多说，由于DBUS很复杂，有兴趣的可以自行搜索学习下。这里，我只说解决方法。

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## 解决方案： ##

其实是缺少了一个包，我们搜索dbus看下就明白了。

dpkg -l | grep dbus
    ii  at-spi2-core                         2.44.0-3                                amd64        Assistive Technology Service Provider Interface (dbus core)
    ii  dbus                                 1.12.20-2ubuntu4.1                      amd64        simple interprocess messaging system (daemon and utilities)
    ii  dbus-x11                             1.12.20-2ubuntu4.1                      amd64        simple interprocess messaging system (X11 deps)
    ii  libdbus-1-3:amd64                    1.12.20-2ubuntu4.1                      amd64        simple interprocess messaging system (library)
    ii  libdbusmenu-glib4:amd64              16.04.1+18.10.20180917-0ubuntu8         amd64        library for passing menus over DBus
    ii  libdbusmenu-gtk3-4:amd64             16.04.1+18.10.20180917-0ubuntu8         amd64        library for passing menus over DBus - GTK+ version
    ii  libnet-dbus-perl                     1.2.0-1build3                           amd64        Perl extension for the DBus bindings
    ii  python3-dbus                         1.2.18-3build1                          amd64        simple interprocess messaging system (Python 3 interface)

这里少了一个包`dbus-user-session`，装上这个包就不会报错了。

sudo apt install dbus-user-session

我们看下这个包的描述信息，重点看`Description:`

apt info dbus-user-session
    
    Package: dbus-user-session
    Version: 1.12.20-2ubuntu4.1
    Priority: optional
    Section: admin
    Source: dbus
    Origin: Ubuntu
    Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
    Original-Maintainer: Utopia Maintenance Team <pkg-utopia-maintainers@lists.alioth.debian.org>
    Bugs: https://bugs.launchpad.net/ubuntu/+filebug
    Installed-Size: 133 kB
    Provides: dbus-session-bus, default-dbus-session-bus
    Depends: dbus (>= 1.12.20-2ubuntu4.1), libpam-systemd, systemd
    Recommends: systemd-sysv
    Breaks: dbus-x11 (<< 1.9.10-2~), policykit-1 (<< 0.105-12~), udisks2 (<< 2.1.5-2~)
    Homepage: https://dbus.freedesktop.org/
    Task: server-minimal, print-server, ubuntu-desktop-minimal, ubuntu-desktop, cloud-image, ubuntu-desktop-raspi, ubuntu-desktop-raspi, server, ubuntu-server-raspi, ubuntu-server-raspi, kubuntu-desktop, xubuntu-core, xubuntu-desktop, lubuntu-desktop, ubuntustudio-desktop-core, ubuntustudio-desktop, ubuntukylin-desktop, ubuntu-mate-core, ubuntu-mate-desktop, ubuntu-budgie-desktop, ubuntu-budgie-desktop-raspi, ubuntu-budgie-desktop-raspi
    Download-Size: 9442 B
    APT-Manual-Installed: yes
    APT-Sources: http://mirrors.aliyun.com/ubuntu jammy-security/main amd64 Packages
    Description: simple interprocess messaging system (systemd --user integration)
     D-Bus is a message bus, used for sending messages between applications.
     Conceptually, it fits somewhere in between raw sockets and CORBA in
     terms of complexity.
     .
     On systemd systems, this package opts in to the session model in which
     a user's session starts the first time they log in, and does not end
     until all their login sessions have ended. This model merges all
     parallel non-graphical login sessions (text mode, ssh, cron, etc.), and up
     to one graphical session, into a single "user-session" or "super-session"
     within which all background D-Bus services are shared.
     .
     Multiple graphical sessions per user are not currently supported in this
     mode; as a result, it is particularly suitable for gdm, which responds to
     requests to open a parallel graphical session by switching to the existing
     graphical session and unlocking it.
     .
     To retain dbus' traditional session semantics, in which login sessions
     are artificially isolated from each other, remove this package and install
     dbus-x11 instead.
     .
     See the dbus package description for more information about D-Bus in general.
    
    N: There is 1 additional record. Please use the '-a' switch to see it

简单解释下：  
意思就是这个东西是用来进程间通信的消息库，这个是依赖systemd系统的，在用户第一次登录进来开始一个会话，直到所有的登录会话都结束它才结束。

## 总结： ##

对于必须依赖这个包的程序有用，能正常运行的可以不装。