我已经从 12.04 升级到 14.04，但无法进入桌面。我被卡在 tty 上了。
sudo apt-get install ubuntu-desktop results in:
Reading package lists... Done
Building dependency tree
Reading state information... Done
ubuntu-desktop is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 292 not upgraded.
-desktop:~$
答案1
有些软件包尚未更新。尝试从终端运行以下命令：
sudo -s
apt-get update
apt-get dist-upgrade
reboot