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I have (only) Ubuntu 13.10 installed on my laptop and i wanted to boot from cd instead of my hdd so used gparted - I 'unclicked' the option to boot from SDV1 automatically when starting and now i can't use Ubuntu anymore. I thought it would be easy to boot from hdd again but unfortunatelly it isn't (for me). Only thing that seems to work is "ubuntu, linux 3.11.0-15-generic (rescue mode)" and "ubuntu, linux 3.11.0-15-generic", but when i tried to fix this problem by myself there is an information that the files are read-only. I would even accept having to format the whole hdd if it's the fastest/easiest possible solution. I apologise for not giving the exact output data, but i'm using not-english version of ubuntu so i have to translate to english by myself. + I guess that to solve this problem i only need to change the booting option - set it as it was before i changed it - to boot from sdv1, but i don't know how to do it.

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Seems odd that you can boot to recovery mode. At any rate, from what you said, you often need to have one partition marked as bootable. If I am understanding the problem, boot the live USB, run gparted again, and mark the partition as bootable from within gparted. – bodhi.zazen Jan 14 '14 at 18:47

try running from live CD

if doesnt work. Just install again, and save your home directory in someway.

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