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I've searched through the archives, but haven't found my specific problem yet. My apologies if this has been answered.
I upgraded 11.10 to 12.04 this morning and the install went fine I think. When I restarted, I got the purple screen with five dots and then a blank screen. If I hit Alt+Ctrl+F1 I get the login screen, but am stuck there.
I have Ubuntu dual booted with Windows 7 on a Samsung 9 laptop.
I am not a beginner, but I am a bit lost as to what to do next. I've seen a number of posts about Grub, but I am unsure if this applies to my case.
Any help is much appreciated!