Unable to boot post upgade to 12.10 from 12.04 on a dial boot PC

Posted by Prateek on Ask Ubuntu See other posts from Ask Ubuntu or by Prateek
Published on 2012-10-19T22:41:33Z Indexed on 2012/10/19 23:21 UTC
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Filed under:

12.04

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dual-boot

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boot-failure

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grubrescue

I have a dual boot PC with Win7 and Ubuntu. Last night I upgraded from 12.04 to 12.10 and since then I have not been able to boot and PC goes into grub rescue with error "File not found"

I have tried the below steps

set prefix=(hd0,msdos5)/boot/grub/i386-pc/ set root=(hd0,msdos5) insmod normal ( i get error symbol not found : 'grub_disk_dev_list'.

when I try

linux /boot/vmlinuz-3.2.0-32-generic root=/dev/sda5 ro (i get error - command not found 'linux' ) same for initrd

I am not able to find out what sdXX to set also.

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