Solve the Ubuntu system Unlimited login or desktop is a blank problem.

solve the Ubuntu system Unlimited login or desktop a blank problem

Solution: The first case: Graphics driver causes

Solution:
When you enter Ubuntu, switch to the command line interface.
Follow these steps:

1.ctrl +alt +f1  #切换到命令行界面
2.sudo service lightdm stop  #关闭xwindow
3.sudo apt-get–purge Remove nvidia-*< c6/> #卸载驱动
4.sudo sh nvidia*.run    #安装驱动 all  the way accept  --   "whether to use the Xconfig file of NV", yes

second case: unknown cause

If you think it's not a driver, you can find the source of the error by looking at the log.

1. Cd/var/log    
2.cat Xorg.0.log

or view. xsession-errors

1.sudo Find/-name. xsession-errors
2.cd  XXX
3.cat. xsession-errors

Then look at the output log, where the error is. Then delete the error package or file. the third situation: environmental variables/etc/proflie caused byUnder the command line:

1.sudo Cp/etc/profile/etc/profile_bac  #对profile backup
2.sudo rm/etc/profile  #将profile直接删除, or modify the location of your own changes

Fourth: The home directory is full of space, unable to mount causeUse at the command line:

1.df-h

The DF command is a command of the Linux system to view the file system on a disk partition basis, followed by a different parameter to view the remaining space information for the disk.
The approximate display reads as follows:

Seen from the picture, dev/mmcblk0p1 that column, the capacity of 28G, has been used 27G, available 0, has been used 100%, mount point for the root partition directory (/).
This is caused by the inability to login or landing after a blank desktop, only one mouse reason.
Workaround:
Go to the command line, log in, and delete unwanted or temporarily unused files to make room.
Command:

1.sudo rm-fr xxx*

The author was also the fourth way to solve.

The above is to solve the Ubuntu system under the infinite loop login or desktop is blank, only one mouse problem.

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