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I've been dual booting my system with Ubuntu 10.10 (Maverick Meerkat) and 11.04 (Natty Narwhal) but today after an update, I can't boot into 10.10, there's only option to boot into 11.04 and Grub also looks a bit different.

Before this update, I used to see first option for 11.04 and an other option called /dev/sda1 for 10.10 but now there is a new option called Previous Linux Versions, but when I Enter into that menu, there is no option to boot into 10.10 all the options take me to 11.04 now it looks like this... enter image description here

And when I click on Previous Linux Versions...enter image description here

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Possibly a bug, did you have a look at Launchpad? –  Oxwivi Mar 12 '11 at 16:31
    
Didn't find anything. –  Gaurav Butola Mar 12 '11 at 16:50
    
Does doing a grub update in 11.04 change anything? –  Allan Mar 12 '11 at 16:59
    
Already tried updating grub but It doesn't detect 10.10 anymore. –  Gaurav Butola Mar 12 '11 at 17:03
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1 Answer

up vote 3 down vote accepted

First mount the partition on which 10.10 is installed. You can do this by clicking the on the partition in nautilus sidebar.

Once mounted, run this command in the terminal

sudo update-grub2
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Thanks Owais, It solved my problem. If you have a minute could you explain what could have caused the problem, so I'd be more cautious in future. Thanks again. –  Gaurav Butola Mar 12 '11 at 17:49
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your update must have consisted of the linux-kernel or some other package which needs updating of grub.cfg and you must have updated white the 10.10 partition was unmounted resulting in all kernels except 10.10 in the grub list. –  Owais Lone Mar 12 '11 at 18:05
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