There can be many problems due to which screen can go blank. But in my case it was the problem of refresh rate. Since my monitor supported 60 Hz only but by something which i couldn’t figure out have changed my refresh rate to 75 Hz. So i wasn’t able to log into the ubuntu GUI. I searched for the solution for it and found that the screen resolution in 8.10 is handled by a file monitors.xml.
And this file is located in home directory of user in .config directory.
I opened the the above file by:
$ nano .config/monitors.xml
And the following display came:
<monitors version= ” 1 ” >
<configuration>
<clone>no</clone>
<output name= ” default ” >
<vendor>??? </vendor>
<product>0×0000</product>
<serial>0×00000000</serial>
<width>800</width>
<height>600</height>
<rate>108</rate>
<x>0</x>
<y>0</y>
<rotation>normal</rotation>
<reflect_x>no</reflect_x>
<reflect_y>no</reflect_y>
</output>
</configuration>
</monitors>
I simply changed the rate from 75 to 60 and restarted GDM. And I was able to login to GUI of Ubuntu
To restart the gdm:
$ sudo /etc/init.d/gdm restart
This is how my problem was solved.
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