ubuntu 12.04 not booting

[lynx]

i am using ubuntu 12.04 along with windows7. yesterday when i boot ubuntu it hang. it says broken pipe. how i can come out of this. i tried recovery mode. but no success. please help

[Ina Kahn]

Hey there lynx,

i am using ubuntu 12.04 along with windows7. yesterday when i boot ubuntu it hang. it says broken pipe. how i can come out of this. i tried recovery mode. but no success. please help

I'm guessing that by "broken pipe" you get

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Could not write bytes: broken pipes. If that's the case, then the disks are mounted as read-only
in recovery.
You should use root and type

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mount -o remount,rw,errors=remount-ro /.
That should enable writing to the drive. Next,  run

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dkpkg-reconfigure lightdm.
Good luck  Ina