GDM (简体中文)

One might want to autostart certain commands, such as xrandr for instance, on login. This can be achieved by adding a command or script to a location that is sourced by the display manager. See Display manager#Autostarting for a list of supported locations.

首先，您需要将现有的 GNOME Shell 主题解压到您的主目录中的一个文件夹中。 您可以使用以下脚本执行此操作：

进入到创建的目录。 您应该会发现主题文件已被提取到其中。 现在将您喜欢的背景图像复制到此目录。

接下来，您需要在目录中创建一个文件，内容如下：

gnome-shell-theme.gresource.xml

<?xml version="1.0" encoding="UTF-8"?>
<gresources>
  <gresource prefix="/org/gnome/shell/theme">
    <file>calendar-arrow-left.svg</file>
    <file>calendar-arrow-right.svg</file>
    <file>calendar-today.svg</file>
    <file>checkbox-focused.svg</file>
    <file>checkbox-off-focused.svg</file>
    <file>checkbox-off.svg</file>
    <file>checkbox.svg</file>
    <file>close.svg</file>
    <file>close-window-active.svg</file>
    <file>close-window-hover.svg</file>
    <file>close-window.svg</file>    		
    <file>corner-ripple-ltr.png</file>
    <file>corner-ripple-rtl.png</file>
    <file>dash-placeholder.svg</file>
    <file>filter-selected-ltr.svg</file>
    <file>filter-selected-rtl.svg</file>
    <file>gnome-shell.css</file>	
    <file>gnome-shell-high-contrast.css</file>
    <file>icons/message-indicator-symbolic.svg</file>
    <file>key-enter.svg</file>
    <file>key-hide.svg</file>
    <file>key-layout.svg</file>
    <file>key-shift-latched-uppercase.svg</file>
    <file>key-shift.svg</file>
    <file>key-shift-uppercase.svg</file>
    <file>logged-in-indicator.svg</file>
    <file>no-events.svg</file>
    <file>no-notifications.svg</file>
    <file>'''filename'''</file>
    <file>pad-osd.css</file>
    <file>page-indicator-active.svg</file>		
    <file>page-indicator-checked.svg</file>
    <file>page-indicator-hover.svg</file>
    <file>page-indicator-inactive.svg</file>
    <file>process-working.svg</file>
    <file>running-indicator.svg</file>
    <file>source-button-border.svg</file>
    <file>summary-counter.svg</file>
    <file>toggle-off-hc.svg</file>
    <file>toggle-off-intl.svg</file>
    <file>toggle-off-us.svg</file>		
    <file>toggle-on-hc.svg</file>		
    <file>toggle-on-intl.svg</file>
    <file>toggle-on-us.svg</file>		
    <file>ws-switch-arrow-down.png</file>
    <file>ws-switch-arrow-up.png</file>
  </gresource>
</gresources>

将 filename 替换为背景图像的文件名。

现在，打开 文件并更改 定义如下：

#lockDialogGroup {
  background: #2e3436 url(filename);
  background-size: [WIDTH]px [HEIGHT]px;
  background-repeat: no-repeat;
}

将 设置为GDM使用的分辨率, 这可能不一定是图像的分辨率。关于显示分辨率的列表请参阅。Display resolution. 同样，将 filename 替换为背景图像的文件名。

最后，使用以下命令编译主题：

$ glib-compile-resources gnome-shell-theme.gresource.xml

然后将生成的 文件复制到 /usr/share/gnome-shell 目录下。

然后重启 (注意：仅仅退出是不够的) 然后你会发现它在使用你喜欢的背景图片。

有关更多信息，请参阅以下内容 forum thread.

一些 GDM 设置存储在 DConf database中。 可以通过将 keyfiles 添加到 目录，然后以root身份运行 重新编译GDM数据库来配置它们，或者通过登陆系统上的GDM用户并使用"gsettings" 命令直接更改设置。 需要一个 GDM 配置文件 - 这必须手动创建，因为它不再向上游发送，见下文： For the latter approach, you can log into the GDM user with the command below:

# machinectl shell gdm@

创建以下密钥文件 然后重新编译 GDM database或登录 GDM 用户并执行以下操作：

$ gsettings set org.gnome.login-screen logo '/path/to/logo.png'

GDM 不考虑 GNOME 光标主题设置，也忽略根据 XDG specification设置的光标主题. 若要更改 GDM 使用的光标，请创建以下密钥文件：

/etc/dconf/db/gdm.d/10-cursor-settings

[org/gnome/desktop/interface]
cursor-theme='''theme-name'''

然后重新编译 GDM database或登录 GDM 用户并执行以下操作：

$ gsettings set org.gnome.desktop.interface cursor-theme 'theme-name'

单击屏幕右上角的辅助功能图标（一个白色圆圈，中间有一个人的轮廓），然后选中 Large Text 选项。

要设置特定的缩放因子，您可以创建以下密钥文件： 然后重新编译 GDM database或登录 GDM 用户并执行以下操作：

$ gsettings set org.gnome.desktop.interface text-scaling-factor '1.25'

此调整禁用在登录屏幕上（通过键盘）调整系统音量时听到的声音反馈。

创建以下密钥文件： 然后重新编译 GDM database或登录 GDM 用户并执行以下操作：

$ gsettings set org.gnome.desktop.sound event-sounds 'false'

Either create the following keyfile:

/etc/dconf/db/gdm.d/05-power

[org/gnome/settings-daemon/plugins/power]
power-button-action='''action'''

and then recompile the GDM database or alternatively log in to the GDM user and execute the following:

$ gsettings set org.gnome.settings-daemon.plugins.power power-button-action 'action'

where action can be one of , or .

轻触以点击在GDM（和GNOME）中被默认关闭，但是你可以使用dconf设置轻松地开启它。

可用以下命令直接开启轻触以点击：

如果你想使用GUI，请使用：

检查它是否被正确开启：

$ sudo -u gdm gsettings get org.gnome.desktop.peripherals.touchpad tap-to-click

如果你得到一个错误：，请确认dbus正在运行：

在dconf编辑器中设置以下key以关闭或开启无障碍菜单。

当key是false时，无障碍菜单被默认关闭；true时为开启。

系统键盘布局会被应用到GDM。参见Keyboard configuration in Xorg#Using X configuration files。

If a system has multiple users, it is possible to specify a keyboard layout for GDM to use which is different from the system keyboard layout. Firstly, ensure the package is installed. Then start gnome-control-center and navigate to Region & Language -> Input Sources. In the header bar, hit the Login Screen toggle button and then choose a keyboard layout from the list. Note that the Login Screen button will not be visible in the header bar unless multiple users are present on the system .

GDM 2.x（legacy GDM）的用户需要将更改为以下内容：

~/.dmrc

[Desktop]
Language=de_DE.UTF-8   # change to your default lang
Layout=de   nodeadkeys # change to your keyboard layout

The system language will be applied to GDM. If a system has multiple users, it is possible to set a language for GDM different to the system language. In this case, firstly ensure that is installed. Then, start gnome-control-center and choose Region & Language. In the header bar, check the Login Screen toggle button. Finally, click on Language and choose your language from the list. You will be prompted for your root password. Note that the Login Screen button will not be visible in the header bar unless multiple users are present on the system .

将以下内容添加至以开启自动登陆（将username替换为你的用户名）：

or for an automatic login with a delay:

/etc/gdm/custom.conf

[daemon]

TimedLoginEnable=true
TimedLogin=''username''
TimedLoginDelay=1

You can set the session used for automatic login (replace with desired session):

If you want to bypass the password prompt in GDM then simply add the following line on the first line of :

auth sufficient pam_succeed_if.so user ingroup nopasswdlogin

Then, add the group to your system. See User group for group descriptions and group management commands.

Now, add your user to the group and you will only have to click on your username to login.

GDM uses polkit and logind to gain permissions for shutdown. You can shutdown the system when multiple users are logged in by setting:

/etc/polkit-1/localauthority.conf.d/org.freedesktop.logind.policy

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE policyconfig PUBLIC
 "-//freedesktop//DTD PolicyKit Policy Configuration 1.0//EN"
 "http://www.freedesktop.org/standards/PolicyKit/1.0/policyconfig.dtd">


<policyconfig>

  <action id="org.freedesktop.login1.power-off-multiple-sessions">
    <description>Shutdown the system when multiple users are logged in</description>
    <message>System policy prevents shutting down the system when other users are logged in</message>
    <defaults>
      <allow_inactive>yes</allow_inactive>
      <allow_active>yes</allow_active>
    </defaults>
  </action>

</policyconfig>

You can find all available logind options (e.g. reboot-multiple-sessions) here.

It is not advised to login as root, but if necessary you can edit and add the following line before the line :

auth            sufficient      pam_succeed_if.so uid eq 0 quiet

The file should look something like this:

...
auth            sufficient      pam_succeed_if.so uid eq 0 quiet
auth            sufficient      pam_succeed_if.so uid >= 1000 quiet
auth            required        pam_deny.so
...

You should be able to login as root after restarting GDM.

The users for the gdm user list are gathered by AccountsService. It will automatically hide system users (UID < 1000). To hide ordinary users from the login list create or edit a file named after the user to hide in to contain at least:

一些 Desktop environment (简体中文) 保存显示设置于 。xrandr 命令基于该文件内容生成信息。在GDM中类似内容保存在。

如果你有显示器设置（例如朝向，缩放，主屏幕等等）信息于中，并且想要让这些设置用于GDM：

# cp ~/.config/monitors.xml /var/lib/gdm/.config/
# chown gdm:gdm /var/lib/gdm/.config/monitors.xml

文件中屏幕旋转和缩放的部分内容如下：

<monitors version="2">
  <configuration>
    <logicalmonitor>
      ...
      <scale>2</scale>
      ...
      <transform>
        <rotation>right</rotation>
        <flipped>no</flipped>
      </transform>
      ...
    </logicalmonitor>
  </configuration>
</monitors>

更改将在登出后生效，登出是必要的，因为GDM不遵守xorg.conf。

You can use the command to configure X server access permissions.

For instance, to grant GDM the right to access the X server, use the following command:

GDM uses the Wayland backend by default which conflicts with NVIDIA driver. Turning off the Wayland backend could enable proprietary NVIDIA driver.

If GDM starts up properly on boot, but fails after repeated attempts on logout, try adding this line to the daemon section of :

GdmXserverTimeout=60

参见Xorg#Rootless Xorg。

The Wayland backend is used by default and the Xorg backend is used only if the Wayland backend cannot be started. As the Wayland backend has been reported to cause problems for some users, use of the Xorg backend may be necessary. To use the Xorg backend by default, edit the file and uncomment the following line:

#WaylandEnable=false

After removing gdm, systemd may report the following:

user 'gdm': directory '/var/lib/gdm' does not exist

To remove this warning, login as root and delete the primary user "gdm" and then delete the group "gdm":

# userdel gdm
# groupdel gdm

Verify that gdm is successfully removed via and . To round it off, you may want to double-check no unowned files for gdm remain.

GDM uses a separate dconf database to control power management. You can make GDM behave the same way as user sessions by copying the user settings to GDM's dconf database.

$ IFS=