陷入登录循环（Ubuntu 16.04）
一位朋友试图在他的Ubuntu 16.04计算机上重新安装显卡驱动程序（大约3或4个月前从14.04升级），现在陷入无休止的登录循环。 我花了近1.5个小时尝试在这个和其他几个答案的多个答案中提出的大多数命令都无济于事。
这是.xsession-errors
openConnection: connect: No such file or directory cannot connect to brltty at :0 upstart: gnome-session (Unity) main process (2094) terminated with status 1 upstart: Disconnected from notified D-Bus bus upstart: logrotate main process (1919) killed by TERM signal upstart: update-notifier-crash (/var/crash/_sbin_upstart.104.crash) main process (1983) killed by TERM signal upstart: update-notifier-crash (/var/crash/_usr_lib_xorg_Xorg.0.crash) main proc ess (1984) killed by TERM signal upstart: bamfdaemon main process (2047) killed by TERM signal upstart: hud main process (2061) killed by TERM signal upstart: unity7 pre-start process (2065) terminated with status 143 upstart: indicator-bluetooth main process (2106) killed by TERM signal upstart: indicator-power main process (2107) killed by TERM signal upstart: indicator-datetime main process (2111) killed by TERM signal upstart: indicator-sound main process (2116) killed by TERM signal upstart: indicator-printers main process (2119) killed by TERM signal upstart: indicator-session main process (2120) killed by TERM signal upstart: indicator-application main process (2138) terminated with status 1 upstart: unity-panel-service main process (2098) killed by TERM signal
很可能这可能是其他人遇到的问题，但是，由于有这么多其他类似的问题/答案，很难找到可行的东西。
在这一点上，我想如果从一开始我重新安装整个操作系统，我就会花更少的时间。
显卡：AMD Radeon HD 6350 512mb
尝试在恢复模式下启动Ubuntu。
首先，连接以太网电缆并手动配置网络连接： https ： //help.ubuntu.com/community/NetworkConfigurationCommandLine/Automatic
确保您有互联网连接：
ping -c 4 google.com
从那里，删除amd和nvidia驱动程序：
sudo apt-get remove --purge xorg-driver-fglrx fglrx* nvidia* nouveau xserver-xorg-video-ati
这应该删除amd和nvidiavideo驱动程序。
安装开源video驱动程序：
（专有驱动程序可以稍后安装）
Intel: no action needed AMD: sudo apt-get install xserver-xorg-video-ati Nvidia: sudo apt-get install nouveau
重新配置x：
sudo apt-get install build-essential cdbs fakeroot dh-make debhelper debconf libstdc++6 dkms libqtgui4 wget execstack libelfg0 dh-modaliases sudo apt-get install --reinstall libgl1-mesa-glx libgl1-mesa-dri sudo mv /etc/X11/xorg.conf /etc/X11/xorg.conf.old sudo dpkg-reconfigure xserver-xorg
更新并修复损坏的依赖项：
sudo apt-get update && sudo apt-get upgrade && sudo apt-get autoremove && sudo apt-get check
现在重启：
sudo reboot now
您的系统现在应该备份。 要安装专有驱动程序或其他gpu芯片，请访问此处获取说明： https ： //help.ubuntu.com/community/BinaryDriverHowto