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I am using Ubuntu Desktop 14.04 LTS on an Acer Aspire-5742G with Intel Core i3 processor, 8 GB RAM, 640 GB HDD and nVidia GeForce 520M with 1GB memory.

I ran BleachBit with sudo permissions form the terminal. In the GUI that opened I checked all of the features in the left panel of the program, except those for which the system said they would take a long time to perform. I noticed that it deleted some files from the system folders, but I ignored that. After that I did a 

sudo apt-get update && sudo apt-get upgrade

and I rebooted my system.

Immediately after I logged in I got a black screen and the only thing I could do was to open a console by pressing Ctrl+Alt+F1. I pressed Enter, it asked me for my log in credentials. Then I typed in DISPLAY and got the following error:

Cannot start X server - error/display.c/DisplayImageCommand/428

Please tell me what sequence of commands should I enter to fix this. If you need additional information, please ask. Although, I am still able to log in from the guest account.

Thank you in advance!

user285350
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2 Answers2

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Looks like there is a problem with your gpu-drivers. whats the errorcode if you type:

sudo startx

and the log from this:

more /var/log/Xorg.0.log

and this:

lspci | grep VGA
samsy
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0

error written in .xsession-errors in home folder can be helpful access it by pressing ctrl+alt+F1 and type your credentials Right now i can only come up with two problem and their solution 1) Permission of the file can be denied so make all files accessible to ubuntu so you will find the name of file in that error file and do

chmod 777 filename

or if you are lazy enough run these two command . 

    chmod 777 .* 
    chmod 777 *

2) graphic driver might not be compatible so 

sudo apt-get purge nvidia*
aabhas
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