grub not detecting windows 8

Posted by Satyajit B M on Ask Ubuntu See other posts from Ask Ubuntu or by Satyajit B M
Published on 2012-12-11T10:59:16Z Indexed on 2012/12/11 11:16 UTC
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Filed under:

12.04

|

grub2

|

windows-8

I have a dell inspiron 5520. I had installed windows 8 and have ubuntu 12.04 installed in a different partition. I installed grub but it was not showing windows 8. So i added

menuentry "Windows 8" {

set root = "(hd0,4)"

chainloader +1

}

in /etc/grub.d/40_custom. Now i see windows 8 option but it says "error-invalid selection" when i select it. please help. This is the op of fdisk -l command

/dev/sda1 * 16072 626807 305368 de Dell Utility

/dev/sda3 7645184 500201471 246278144 7 HPFS/NTFS/exFAT

/dev/sda4 500203518 976771071 238283777 f W95 Ext'd (LBA)

Partition 4 does not start on physical sector boundary.

/dev/sda5 500203520 870275071 185035776 7 HPFS/NTFS/exFAT

/dev/sda6 870277120 886276095 7999488 82 Linux swap / Solaris

/dev/sda7 886278144 976771071 45246464 83 Linux

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