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Working earlier tonight, my mouse froze in the middle of the screen, and so I restarted my system. Upon trying to log back in, the screen flashes black, and something along the lines of saned: edit /etc/default/sane and Checking battery state before it flashes back to the login screen.

I've scanned the askubuntu files which discuss a similar problem and I've purged and reinstalled: nvidia-common, lightdm, ubuntu-desktop, gdm, gnome-power-manager, lightdm-gtk-greeter, and unity-greeter. I've deleted ~/.Xauthority.

My graphics card is:

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor
Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])

so it shouldn't be a problem with nvidia anything.

I can log in as a guest user and with the TTY, but I just can't log in as my primary user.

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Have you enabled autologin some time back? This happened to me earlier when i enabled autologin and upgraded my system. –  Vinit Jul 3 '12 at 7:25
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1 Answer 1

I have the same configuration, same Intel 2nd generation .. Xubuntu 12.04, and same hangs after "checking battery state" from time to time. I don't have any Nvidia driver.

Short-cut solution : You can log into tty and launch startx.

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