我的 Ubuntu 16.04 一直在运行 Unity，直到我最近决定迁移到 Gnome 3。现在，当我启动时，我最终进入多用户模式，必须登录控制台并输入 starx 才能启动 GUI。我阅读了有关该主题的几篇文章，但我对我的设置感到困惑：
- 我确实
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.dpm=1 radeon.modeset=1 i915.modeset=1"有/etc/default/grub - 我也有
DEFAULT_RUNLEVEL=2环境/etc/init/rc-sysinit.conf - 执行
systemctl get-default returns graphical.target
读了周围的帖子，我期望这 3 个配置信息中的后者是我系统上执行的配置信息，但事实似乎并非如此。有什么想法吗？
后期编辑添加输出systemctl status display-manager.service：
● gdm.service - GNOME Display Manager
Loaded: loaded (/lib/systemd/system/gdm.service; static; vendor preset: enabled)
Drop-In: /lib/systemd/system/display-manager.service.d
└─xdiagnose.conf
Active: active (running) since mar. 2018-03-06 20:11:25 CET; 1 day 19h ago
Process: 2141 ExecStartPre=/usr/share/gdm/generate-config (code=exited, status=0/SUCCESS)
Process: 2126 ExecStartPre=/bin/sh -c [ "$(cat /etc/X11/default-display- manager 2>/dev/null)" = "/usr/sbin/gdm3" ] (code=exited, status=0/SUCCESS)
Main PID: 2151 (gdm3)
Tasks: 3
Memory: 4.4M
CPU: 600ms
CGroup: /system.slice/gdm.service
└─2151 /usr/sbin/gdm3
mars 07 17:10:11 port-jct gdm-password][22146]: pam_succeed_if(gdm- password:auth): requirement "user ingroup nopasswdlogin" not met by user "cohen"
mars 07 18:44:44 port-jct gdm-password][26575]: pam_succeed_if(gdm-password:auth): requirement "user ingroup nopasswdlogin" not met by user "cohen"
mars 07 19:39:53 port-jct gdm-password][29033]: pam_succeed_if(gdm-password:auth): requirement "user ingroup nopasswdlogin" not met by user "cohen"
mars 07 19:39:53 port-jct gdm-password][29033]: pam_unix(gdm-password:auth): conversation failed
mars 07 19:39:53 port-jct gdm-password][29033]: pam_unix(gdm-password:auth): auth could not identify password for [cohen]
mars 07 19:39:54 port-jct gdm-password][29038]: pam_succeed_if(gdm- password:auth): requirement "user ingroup nopasswdlogin" not met by user "cohen"
mars 07 21:14:57 port-jct gdm-password][953]: pam_succeed_if(gdm-password:auth): requirement "user ingroup nopasswdlogin" not met by user "cohen"
mars 08 07:48:09 port-jct gdm-password][6299]: pam_succeed_if(gdm-password:auth): requirement "user ingroup nopasswdlogin" not met by user "cohen"
mars 08 08:50:11 port-jct gdm-password][9472]: pam_succeed_if(gdm-password:auth): requirement "user ingroup nopasswdlogin" not met by user "cohen"
mars 08 13:35:07 port-jct gdm-password][19396]: pam_succeed_if(gdm-password:auth): requirement "user ingroup nopasswdlogin" not met by user "cohen"