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Old 09-27-2014, 11:18 PM   #1
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Registered: Jun 2014
Distribution: many
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Can't Login Ubuntu 12.04 LTS login loop?

Do to a power failure during upgrade, the first thing I had to do is figure out why my filesystem failed to mount so,:

I gott to the maintenance shell, and tried this:

sudo mount -o remount,rw /
sudo dpkg --configure -a

Here is where I got errors to bluez etc.

Then I tried:
sudo mount -o remount,ro /
sudo sync
sudo reboot

When I rebooted, I made it all the way into the login screen and started patting myself on the back, much to my chagrin
When I entered my username and password the screen flashes what looks like an unexpected error screen for like a millisecond and then I am right back to the login screen. Yes I checked my password and no there is no login/password incorrect msg. Yes, I did try logging in on ctrl +alt +f1 to no avail (interestingly enough this would not except my username/password).


Thank you in advance for your consideration,
Old 09-28-2014, 12:03 AM   #2
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Registered: Feb 2011
Location: Australia
Distribution: Debian Wheezy, Jessie, Sid/Experimental, playing with LFS.
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If you have a live disk or usb I would boot into a live session and repair the installation via chroot.

mkdir /mnt/tmp
mount /dev/xxx /mnt/tmp ###where xxx is your disk designation e.g. sda1###
for i in /dev /dev/pts /proc /sys; do sudo mount -B $i /mnt/tmp$i; done
cp /etc/resolv.conf /mnt/tmp/etc/resolv.conf
chroot /mnt/tmp

for i in /dev/pts /dev /proc /sys; do sudo umount /mnt/temp$i ; done

#Some repair commands
apt-get update
apt-get upgrade
apt-get install -f
dpkg --configure -a
apt-get dist-upgrade
Old 09-28-2014, 12:22 AM   #3
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Registered: Dec 2008
Location: Westgate-on-Sea, Kent, UK
Distribution: Debian Testing Amd64
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I had a similar problem with Ubuntu 14.04. I kept getting sent back to the login screen after entering my password. The problem was solved by setting all the permissions in my home folder like this:
sudo chmod -R ugoa+rwx /home/*myusername*


login, ubuntu 12.04

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