Ubuntu lightdm login cannot be implemented by users

The ubuntu lightdm login device cannot be logged on to solve the problem of compiling the kernel last weekend. After just making the file, it was found that the file could not be logged on ~~~ Find various causes on the network, but recently found that there is no available hard disk space in the login user directory. Error: after entering the password on the lightdm login Device of ubuntu, some information is flashed on the screen, and then the password input interface is re-displayed. Modify/etc/lightdm. after greeter-show-manual-login = true is added to the conf file, you can enter the username [SeatDefaults] user-session = combine tugreeter-session = unity-greetergreeter-show-manual-login = in lightdm. trueallow-guest = false and then use root to log on, as a result, the root user can log on normally. Follow the modification method found on the network to log on to the system using the running machine of the running machine. 1. Press ctrl + alt + f1 to start the command line to log on. 2. Run the following command to install the command. "Sudo apt-get install TPD" 3. Configure the Default Login options ." Sudo dpkg-reconfig TPD "uses the WordPress as the default login device. 4. After the restart, the login result shows that you can log on to the WordPress using the TDS agent normally. However, when an application is started, an error message is displayed, prompting that there is no hard disk space. This information is really critical. Haha, that's it. However, the hard disk space in my user directory is fully occupied when another kernel is compiled in the virtual machine, which is attached to the search process as follows, there are similar solutions for ubuntu login errors: solution 1: if there is an unknown problem with the lightdm login device, you can directly use the RTL login device to log on. However, after login, you will need to modify the relevant bash, which may be different from the PATH variable directory after lightdm login. solution 2: on the logon page, use ctrl + alt + F1 to enter the command line mode and view. the property of the Xauthority file. Whether the ower and group are your usernames. Otherwise, restart sudo chown yourusername: yourusername. xauthority solution 3: If you have modified the desktop wallpaper when using ubuntu, you can use solution 1 to first log on to the gnome environment and then change the wallpaper to the built-in wallpaper, after the restart, use lightdm to log on to solution 4: If the preceding error is not known and there is no hard disk space, check the lightdm error information in the command line, then google again. The log location of lightdm: sudo less/var/log/lightdm/x-0-greeter.logsudo less/var/log/lightdm. log