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I managed to install Ubuntu 13.04 by disabling "Virtualization Technology" in my BIOS (which I believe let's me operate several OS's) and changing in GRUB2 quiet splash to quiet splash nomodeset.

However, when I reboot after installation (I installed the third party software), my screen will start blinking again. So I again changed the command quiet splash to quiet splash nomodeset but now I end up in what I believe is the terminal. But I do not know how to proceed from here.

My computer is a Toshiba Satellite S855-S5170 and I attribute this problem to the dual graphics card (AMD Radeon HD 7670M Graphics 2GB DDR3)

UPDATE 27/04/13

I changed 'quiet splash' to 'nomodeset' as it was suggested, but I did the same thing (i end up in the terminal) Then (inside the terminal) I tried 'startx' but it says that '[KSM] drm report modesetting isnt supported' 'fatal error: no screens found' What can I do now? Thanks for the support.

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What happens if you run the "startx" command in the terminal? Does this fix the problem on reboot? – somoso Apr 26 '13 at 22:12
I managed to install Ubuntu 13.04 by disabling "Virtualization Technology" in my BIOS What happened before that? I installed the third party software What software did you install and why? – Alex Apr 26 '13 at 22:44
Try looking at this link, I had a similar problem:… According to me there is a syntax error: you need to replace quiet splash to nomodeset. You have to instead replaced quiet splash quiet splash nomodeset Right? – user152664 Apr 27 '13 at 0:02
@Alex I checked the "Install third party software" during Ubuntu 13.04 installation process – octavio.arriaga Apr 27 '13 at 17:52
@somoso I tried startx but it gives the error I described above. – octavio.arriaga Apr 27 '13 at 17:54

Try startx to start GUI from a terminal.

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