☰

Ubuntu 18.04.6：仅使用 nosplash 才能正常启动，否则会出现没有登录提示的引导循环

tag-icon • tag-icon boot 18.04
Ubuntu 18.04.6：仅使用 nosplash 才能正常启动，否则会出现没有登录提示的引导循环

最近，在对 Ubuntu 18.04.6（内核 5.4.0-125-generic）进行例行自动更新后，默认启动陷入了启动循环，从未进入登录提示。从视觉上看，在启动时会显示默认的 Ubuntu 启动画面（点前进），但随后启动画面突然闪烁并再次显示（点前进），然后再次闪烁……如此无限循环，从未提示登录。所以我需要按下电源按钮来中断启动循环。

splash通过在 GRUB2 启动菜单中手动更改为，系统可以正常启动nosplash。也可以启动到恢复模式。

检查日志显示，在启动循环中，Xorg 似乎无法启动，然后每次都尝试重新启动，但都失败了。下面是摘录自/var/lib/gdm3/.local/share/xorg/Xorg.0.log，显示了第一个 (EE) 错误：

[    14.945] (--) Log file renamed from "/var/lib/gdm3/.local/share/xorg/Xorg.pid-1816.log" to "/var/lib/gdm3/.local/share/xorg/Xorg.0.log"
[    14.945]
X.Org X Server 1.20.8
X Protocol Version 11, Revision 0
[    14.945] Build Operating System: Linux 5.4.0-121-generic x86_64 Ubuntu
[    14.945] Current Operating System: Linux box 5.4.0-125-generic #141~18.04.1-Ubuntu SMP Thu Aug 11 20:15:56 UTC 2022 x86_64
[    14.945] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.4.0-125-generic root=UUID=18b08207-3e7f-4106-a123-58417720e98d ro quiet splash vt.handoff=1
[    14.945] Build Date: 06 July 2022  02:40:21PM
[    14.945] xorg-server-hwe-18.04 2:1.20.8-2ubuntu2.2~18.04.7 (For technical support please see http://www.ubuntu.com/support)
[    14.945] Current version of pixman: 0.34.0
[    14.945]    Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
[    14.945] Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
[    14.945] (==) Log file: "/var/lib/gdm3/.local/share/xorg/Xorg.0.log", Time: Fri Sep  9 09:36:16 2022
[    14.945] (==) Using system config directory "/usr/share/X11/xorg.conf.d"
[    14.946] (==) No Layout section.  Using the first Screen section.
[    14.946] (==) No screen section available. Using defaults.
[    14.946] (**) |-->Screen "Default Screen Section" (0)
[    14.946] (**) |   |-->Monitor "<default monitor>"
[    14.946] (==) No monitor specified for screen "Default Screen Section".
        Using a default monitor configuration.
[    14.946] (==) Automatically adding devices
[    14.946] (==) Automatically enabling devices
[    14.946] (==) Automatically adding GPU devices
[    14.946] (==) Automatically binding GPU devices
[    14.946] (==) Max clients allowed: 256, resource mask: 0x1fffff
[    14.946] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
[    14.946]    Entry deleted from font path.
[    14.946] (WW) The directory "/usr/share/fonts/X11/100dpi/" does not exist.
[    14.946]    Entry deleted from font path.
[    14.946] (WW) The directory "/usr/share/fonts/X11/75dpi/" does not exist.
[    14.946]    Entry deleted from font path.
[    14.946] (WW) The directory "/usr/share/fonts/X11/100dpi" does not exist.
[    14.946]    Entry deleted from font path.
[    14.946] (WW) The directory "/usr/share/fonts/X11/75dpi" does not exist.
[    14.946]    Entry deleted from font path.
[    14.946] (==) FontPath set to:
        /usr/share/fonts/X11/misc,
        /usr/share/fonts/X11/Type1,
        built-ins
[    14.946] (==) ModulePath set to "/usr/lib/xorg/modules"
[    14.946] (II) The server relies on udev to provide the list of input devices.
        If no devices become available, reconfigure udev or disable AutoAddDevices.
[    14.946] (II) Loader magic: 0x555d931d0020
[    14.946] (II) Module ABI versions:
[    14.946]    X.Org ANSI C Emulation: 0.4
[    14.946]    X.Org Video Driver: 24.1
[    14.946]    X.Org XInput driver : 24.1
[    14.946]    X.Org Server Extension : 10.0
[    14.947] (++) using VT number 1

[    14.950] (II) systemd-logind: took control of session /org/freedesktop/login1/session/c6
[    14.951] (II) xfree86: Adding drm device (/dev/dri/card0)
[    14.951] (II) systemd-logind: got fd for /dev/dri/card0 226:0 fd 12 paused 1
[    14.951] (EE) Error systemd-logind returned paused fd for drm node
[    14.951] (II) systemd-logind: releasing fd for 226:0

.....
[    15.397] (EE) modeset(0): drmSetMaster failed: Permission denied
[    15.397] (EE)
Fatal server error:
[    15.397] (EE) AddScreen/ScreenInit failed for driver 0

在nosplash启动时，第一个（EE）错误不存在，而是显示相应的（II）：

[    10.079] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-5.4.0-125-generic root=UUID=18b08207-3e7f-4106-a123-58417720e98d ro quiet nosplash vt.handoff=1
....
[    10.091] (II) systemd-logind: got fd for /dev/dri/card0 226:0 fd 12 paused 0
....

这将启动 Xorg ($XDG_SESSION_TYPE x11)。但同样，nosplash它也可以成功登录 Wayland。

不确定这里可能存在什么问题。splash可能是由普利茅斯处理的，但是否nosplash完全排除普利茅斯以让启动继续进行？

我可以在 GRUB2 中强制执行nosplash，但似乎某个地方存在一些潜在问题，我宁愿现在就修复它，也不愿在不合时宜的时候面对它。

答案1

目前还不清楚到底是什么导致了这个问题，但我设法解决的方法是重新安装gdm3并ubuntu-desktop

  1. 启动进入恢复内核/控制台
  2. 启用网络
  3. 打开 root 提示
     apt install --reinstall gdm3
     apt install --reinstall ubuntu-desktop
     restart

这将保留所有当前设置；仅重新安装这些包中的文件。

注意：在这种情况下，由于某种原因，可以通过使用参数启动内核来防止引导循环nosplash。

在GRUB中，点击E (edit)启动选项，修改linux load命令，Ctrl+X保存并启动。

相关内容