Ubuntu 在发布升级后打开黑屏并闪烁下划线字符

Question

我将我的 Ubuntu 操作系统从 12.10 升级到 13.04，在通过软件更新程序升级后，它要求我重新启动计算机。

我重新启动并在启动时进入带有 Ubuntu 文本和其下方 5 个点的紫色屏幕，然后继续进入带有闪烁下划线字符 (_) 的空白黑屏。

我的所有文件都在那里，我无法访问它们。我尝试了其他问题指出的 grub 启动菜单编辑，但它似乎没有做任何事情。

Answer 1

请尝试以下操作：

按Ctrl+ Alt+F1

您将看到一个用于登录的终端，输入您的凭据并执行以下命令：

sudo service lightdm --full-restart

再次输入您的密码，您应该会看到登录页面

Answer 2

在 Ubuntu 18.04 及更高版本中， lightdm 登录显示管理器已被 gdm3 取代，访问虚拟控制台的键盘快捷键已从Ctrl+ Alt+更改F1为Ctrl+ Alt+ F3。sudo dpkg-reconfigure lightdm已被 取代sudo dpkg-reconfigure gdm3。sudo service lightdm restart已被 取代sudo service gdm3 restart。

Answer 3

以下是在运行 Ubuntu 16.10 的 Dell Precision M6800 笔记本电脑上对我有用的方法：

First, at the black screen with the cursor in the top-left (which wasn’t blinking in my case), I followed this answer and pressed Ctrl+Alt+F1 to show a terminal, and logged in with my username and password.

That answer suggests running sudo service lightdm --full-restart, but the command only gave me an error. Instead, this answer’s solution of removing and reinstalling lightdm was what brought me forward. Note that a wired internet connection is required for the apt-get install part; wireless internet is apparently not set up yet at this stage in the boot process.

sudo apt-get purge lightdm
sudo apt-get update
sudo apt-get install lightdm
dpkg-reconfigure lightdm
sudo reboot

After this reboot, the login screen successfully showed, at the point in time where previously the one-line log message disappeared and the underline cursor appeared. But when I entered my correct password to log in, I only got the error “Failed to start session” in red text.

The article ‘Fix “Failed To Start Session” At Login In Ubuntu 14.04’ helped with that. At the login screen with the error message, I pressed Ctrl+Alt+F1 again to show a terminal, and logged in. Then I ran sudo apt-get install ubuntu-desktop, which installed ubuntu-desktop for the first time. Finally, I ran sudo reboot to reboot.

When the computer finished rebooting, I was able to successfully log in at the login screen and return to using the computer normally.

Answer 4

我不知道这是否会对您有所帮助，但是在我将硬盘从一台计算机移到另一台计算机后，这发生在我身上。我有一个黑屏，每次我尝试启动时，命令光标都会闪烁并嘲笑我。重新安装和重新安装后。我检查了我的设置，我的电脑启动了错误的硬盘驱动器。我交换了驱动器顺序，引导加载程序出现了。

同样，这只是我对黑屏光标闪烁的体验。解决方案是：

F2 > 引导 > 交换驱动器的引导顺序。

Answer 5

您是否尝试过此我的计算机启动黑屏中列出的选项，我必须采取哪些选项来修复它？ 另外，您有独立显卡吗？可能采用 Optimus 技术吗？如果是，请从Bumblebee wiki安装 bumbleebee 项目。