(13.04) lightdm 崩溃 - 黑屏闪烁光标

Question

我在我的 PC 上使用 Ubuntu 的 13.04 x64 版本，至少它可以正常工作。但是，lightdm 在启动过程中突然崩溃，即使我尝试在切换到另一个 tty 后从终端手动启动它。

我不知道是什么导致了这些问题，因为我什至没有为我的 nvidia 卡安装任何图形驱动程序（因为我从几年前就知道这些问题，并且通过不安装任何一个来跳过这些问题）。

在全新安装和更新后，它可以正常工作几天，但现在它不应该如此。

切换到 gdm 确实解决了使用 gui 登录我的计算机的问题，但是我猜这个 lightdm 应该可以工作。

日志对我没有多大帮助，但也许有人知道发生了什么？

lightdm.log

 [+0.00s] DEBUG: Logging to /var/log/lightdm/lightdm.log [+0.00s]
 DEBUG: Starting Light Display Manager 1.6.0, UID=0 PID=7369 [+0.00s]
 DEBUG: Loaded configuration from /etc/lightdm/lightdm.conf [+0.00s]
 DEBUG: Using D-Bus name org.freedesktop.DisplayManager [+0.00s] DEBUG:
 Registered seat module xlocal [+0.00s] DEBUG: Registered seat module
 xremote [+0.00s] DEBUG: Adding default seat [+0.00s] DEBUG: Starting
 seat [+0.00s] DEBUG: Starting new display for greeter [+0.00s] DEBUG:
 Starting local X display [+0.00s] DEBUG: Using VT 7 [+0.00s] DEBUG:
 Activating VT 7 [+0.01s] DEBUG: Logging to /var/log/lightdm/x-1.log
 [+0.01s] DEBUG: Writing X server authority to /var/run/lightdm/root/:1
 [+0.01s] DEBUG: Launching X Server [+0.01s] DEBUG: Launching process
 7376: /usr/bin/X :1 -core -auth /var/run/lightdm/root/:1 -nolisten tcp
 vt7 -novtswitch [+0.01s] DEBUG: Waiting for ready signal from X server
 :1 [+0.01s] DEBUG: Acquired bus name org.freedesktop.DisplayManager
 [+0.01s] DEBUG: Registering seat with bus path
 /org/freedesktop/DisplayManager/Seat0 [+0.61s] DEBUG: Got signal 10
 from process 7376 [+0.61s] DEBUG: Got signal from X server :1 [+0.61s]
 DEBUG: Connecting to XServer :1 [+0.61s] DEBUG: Starting greeter
 [+0.62s] DEBUG: Started session 7385 with service 'lightdm-greeter',
 username 'lightdm' [+0.64s] DEBUG: Session 7385 authentication
 complete with return value 0: Success [+0.64s] DEBUG: Greeter
 authorized [+0.64s] DEBUG: Logging to /var/log/lightdm/x-1-greeter.log
 [+0.64s] DEBUG: Session 7385 running command
 /usr/lib/lightdm/lightdm-greeter-session /usr/sbin/unity-greeter
 [+0.68s] DEBUG: Greeter closed communication channel [+0.68s] DEBUG:
 Session 7385 exited with return value 1 [+0.68s] DEBUG: Greeter quit
 [+0.68s] DEBUG: Failed to start greeter [+0.68s] DEBUG: Stopping
 display [+0.68s] DEBUG: Sending signal 15 to process 7376 [+0.82s]
 DEBUG: Process 7376 exited with return value 0 [+0.82s] DEBUG: X
 server stopped [+0.82s] DEBUG: Removing X server authority
 /var/run/lightdm/root/:1 [+0.82s] DEBUG: Releasing VT 7 [+0.82s]
 DEBUG: Display server stopped [+0.82s] DEBUG: Stopping seat, failed to
 start a display [+0.82s] DEBUG: Stopping seat [+0.82s] DEBUG: Seat
 stopped [+0.82s] DEBUG: Required seat has stopped [+0.82s] DEBUG:
 Stopping display manager [+0.82s] DEBUG: Display manager stopped
 [+0.82s] DEBUG: Stopping daemon [+0.82s] DEBUG: Exiting with return
 value 1

---

x-0-greeter.log

 Error writing X authority: Failed to write X authority
 /var/lib/lightdm/.Xauthority: Success

---

x-1-greeter.log

 Error writing X authority: Failed to write X authority
 /var/lib/lightdm/.Xauthority: Success /var/log/lightdm/x-1-greeter.log
 (END)

---

x0.log

 X.Org X Server 1.13.3 Release Date: 2013-03-07 X Protocol Version 11,
 Revision 0 Build Operating System: Linux 3.2.0-37-generic x86_64
 Ubuntu Current Operating System: Linux stefan-dev 3.8.0-30-generic
 #44-Ubuntu SMP Thu Aug 22 20:52:24 UTC 2013 x86_64 Kernel command line: BOOT_IMAGE=/boot/vmlinuz-3.8.0-30-generic
 root=UUID=6e9c6967-a55f-49b8-b690-7257b359ae8d ro quiet splash
 vt.handoff=7 Build Date: 17 April 2013  10:43:13PM xorg-server
 2:1.13.3-0ubuntu6 (For technical support please see
 http://www.ubuntu.com/support)  Current version of pixman: 0.28.2
Before reporting problems, check http://wiki.x.org
to make sure that you have the latest version. Markers: (--) probed, (**) from config file, (==) default setting,
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown. (==) Log file: "/var/log/Xorg.0.log", Time: Tue Sep 17 18:27:30 2013
 (==) Using system config directory "/usr/share/X11/xorg.conf.d"
 Initializing built-in extension Generic Event Extension Initializing
 built-in extension SHAPE Initializing built-in extension MIT-SHM
 Initializing built-in extension XInputExtension Initializing built-in
 extension XTEST Initializing built-in extension BIG-REQUESTS
 Initializing built-in extension SYNC Initializing built-in extension
 XKEYBOARD Initializing built-in extension XC-MISC Initializing
 built-in extension SECURITY Initializing built-in extension XINERAMA
 Initializing built-in extension XFIXES Initializing built-in extension
 RENDER Initializing built-in extension RANDR Initializing built-in
 extension COMPOSITE Initializing built-in extension DAMAGE
 Initializing built-in extension MIT-SCREEN-SAVER Initializing built-in
 extension DOUBLE-BUFFER Initializing built-in extension RECORD
 Initializing built-in extension DPMS Initializing built-in extension
 X-Resource Initializing built-in extension XVideo Initializing
 built-in extension XVideo-MotionCompensation Initializing built-in
 extension SELinux Initializing built-in extension
 XFree86-VidModeExtension Initializing built-in extension XFree86-DGA
 Initializing built-in extension XFree86-DRI Initializing built-in
 extension DRI2 Loading extension GLX resize called 1680 1050 Server
 terminated successfully (0). Closing log file.

Answer 1

我花了两天时间。最终解决方案：

1. sudo dpkg-reconfigure gdm#选择GDM
2. sudo apt-get remove lightdm* --purge
3. sudo reboot
4. sudo apt-get install lightdm*
5. sudo dpkg-reconfigure gdm#选择lightdm

Answer 2

我在 Debian Sid 上遇到了同样的问题，并发现删除文件.Xauthority可以纠正它，尽管这不是一个非常可靠的解决方案，因为我每次重新启动时都必须这样做，但这是一种解决方法，使我能够返回到我的 gui。

• 将文件重命名/var/lib/lightdm/.Xauthority为/var/lib/lightdm/.Xauthority-BAKwith

  sudo mv /var/lib/lightdm/.Xauthority /var/lib/lightdm/.Xauthority-BAK
  

• 重新启动 lig​​htdm 服务

  sudo service lightdm stop
  sudo service lightdm start