Could not write bytes: broken pipe

[Ralf Mardorf]

Hi Dennis

1.

It's important to know, how you access your Lubuntu at the moment.

E.g. by a live CD, in other words from a another Linux? Or perhaps by
booting it, but without assessing a desktop environment?

Become root and then:

2.

Regarding to your "display" issue, please post the complete output of

grep EE /var/log/Xorg.0.log > grep.txt

3.

Regarding to find a way to backup you Lubuntu, please post the complete
output of

parted -l > parted.txt

4.

and please post the complete output of

df -h > df.txt

5.

The output you should post is in the files
grep.txt
parted.txt
df.txt

Regards,
Ralf