How do I restore logging in with an X session graphics instaed of text-only session?

Posted by ajThree9 on Ask Ubuntu See other posts from Ask Ubuntu or by ajThree9
Published on 2013-11-06T13:05:07Z Indexed on 2013/11/07 10:18 UTC
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Filed under:

boot

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grub2

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lightdm

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gdm

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display-manager

I was able to set up a text UI by editing the file /etc/default/grub in Ubuntu 12.04 as per the instructions in: How do I disable X at boot time so that the system boots in text mode?

But, how do I revert to X-session as the default one? I don't want to log into text mode and 'start' the lightdm every time. So I tried replacing back the GRUB_CMDLINE_LINUX_DEFAULT="text" to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash", and did update-grub too, but something unexpected happened, an unbootable system! How do I fix this?

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