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im looking to install 10.04 over top the 11.04 partition, it wouldnt let. keeps giving me a "root file system not found" error ever time i manually select partition. (i have a win7 partition) 11.04 popped up after upgrade that my hardware isnt supported for unity. and i cant boot into it, hangs up on purple screen right after boot menu.

if anyone can post a link to a how to guide or put it on here, would be great?

im trying to take advantage of my nvidia geforce gt 120m (its a laptop) to play around with cuda/c++ programming!

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From partition table(during installing 10.04) select your linux drive(it should be ext3 or ext4), select edit button, select mount point as "/", check format disk. Now move forward. Try to boot in recovery mode to login in your existing ubuntu. Are you sure upgrade completed successfully? –  shantanu Mar 28 '12 at 4:51
    
why dont you supply your comment as an answer so i can check it off, you comment worked! –  Alex Mar 28 '12 at 17:35
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From partition table(during installing 10.04)

1. select your linux drive(it should be ext3 or ext4)
2. select edit button
3  select mount point as "/"
4 check format disk.

Now move forward. Try to boot in recovery mode to login in your existing ubuntu. Are you sure upgrade completed successfully?

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