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After upgrading from 14.10 to 15.04, lightdm won't start.

Failed to start lightdm.service: Unit lightdm.service failed to load: No such file or directory.

I have a HP Spectre x360 with Intel Core i7-5500U with Intel HD Graphics 5500. I have tried most of the things I could find on forums with no success.

Pilot6
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Dragos Dumitrescu
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1 Answers1

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The issue was that I had no drivers for video. I didn't have xserver-xorg-core installed. (I also reinstalled unity).

sudo apt-get install xserver-xorg-core
sudo apt-get install xserver-xorg-video-intel

And then I had an issue with login screen (Ubuntu gets stuck in a login loop)

chown username:username .Xauthority
guntbert
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Dragos Dumitrescu
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