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I just installed Ubuntu 12.04 on my new machine and everything works fine. However, when I install postgresql and shut down the computer, when I log back in, there's no graphical login screen. The screen flashes a login prompt (white text on a black screen), then flashes again and just displays a blinking white cursor in the top left of an otherwise totally black screen. At this point, I can type in my password and it lets me into a fully functional graphical ubuntu (although there do seem to be some graphical issues with Chrome)

If I uninstall postgresql, this problem goes away. But I need postgresql for work... so how can I have both a working login screen and a postgresql install?

UPDATE: Through some more experimenting I found that by disabling the postgresql server at startup I can eliminate the issue. I just run:

sudo update-rc.d -f postgresql remove

However, this obviously prevents posgresql from starting up when I log in... so if I want postgresql to be running when I log in... what do I do?

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