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I tried boot-repair and followed the steps it asked me and showed everything as ok on completion of the program. I restarted the system and it automatically booted Ubuntu without showing any option for windows. Here is my output before and after running the boot-repair program: http://paste.ubuntu.com/12306439/

P.S. I am a complete newbie in Linux and this is my first attempt at any OS except Windows so I am completely at loss here,

Sanjay Bist
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  • Login into ubuntu, open terminal and give sudo update-grub && sudo reboot now . That should do it – We are Borg Sep 07 '15 at 14:05
  • @WeareBorg Well I tried it and I did not get any entry for Windows so I am not sure if I did it right. sanjay@Kaos:~$ sudo update-grub [sudo] password for sanjay: Generating grub configuration file ... Found linux image: /boot/vmlinuz-3.16.0-30-generic Found initrd image: /boot/initrd.img-3.16.0-30-generic Found linux image: /boot/vmlinuz-3.13.0-63-generic Found initrd image: /boot/initrd.img-3.13.0-63-generic Adding boot menu entry for EFI firmware configuration done – Sanjay Bist Sep 07 '15 at 15:08

2 Answers2

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From the file you uploaded at paste.ubuntu.com, I see that you must see GRUB that allow you to select between Ubuntu and windows.

If you can see grub2 during booting, you can select windows from there.

If you don't see GRUB , try pressing Esc key repeatedly just after you turn on your device. This may help you enter the GRUB.

Also try this

  1. Boot into ubuntu. Open terminal by pressing Ctrl+Alt+t.
  2. enter sudo update-grub. press Enter key.
  3. reboot.
kashish
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  • I can see grub2 alright. But the problem is no option for windows is present in the Grub menu. Also when I try to select UEFI from the menu by pressing F9. I dont get any positive result and I am back again on the Grub menu. – Sanjay Bist Sep 07 '15 at 15:18
  • read http://askubuntu.com/questions/210914/grub-does-not-show-a-windows-8-option-after-dual-boot – kashish Sep 07 '15 at 15:34
  • Thanks @Kashish. I have read the suggested thread but I am stuck in installing rEFInd at the moment. Ubuntu software Center says its installed but I can't seems to work out how do I start it?? – Sanjay Bist Sep 08 '15 at 12:52
  • As mentioned here, an easier way to install rEFInd is to enter the following commands in the terminal.

    sudo apt-add-repository ppa:rodsmith/refind and sudo apt-get update and sudo apt-get install refind

    After installing rEFInd,you dont need to do anything else except rebooting, It will appear on boot.

     – kashish Sep 08 '15 at 13:39
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Several points:

  • Your disk uses GPT, and there's evidence of an EFI-mode Windows boot loader. On a GPT disk Windows must boot in EFI mode. This in turn means that, if GRUB controls the boot process, it must be an EFI-mode version of GRUB; the BIOS-mode GRUB will be useless to you.
  • You've got both BIOS-mode and EFI-mode GRUB installations. This makes it hard to tell which GRUB is in control of the boot process. Given the preceding point, if the BIOS-mode GRUB ends up being run, it's Game Over in terms of booting Windows, at least for that particular boot. The best way to ensure that this won't happen is to disable the Compatibility Support Module (CSM), aka legacy-mode boot support, in your firmware setup utility. (Many Ubuntu installation guides provide the bad advice to enable this feature. Doing so creates confusion and problems like yours.)
  • Your EFI System Partition (ESP) is near the end of the disk rather than near the beginning, where it's more commonly found. Your configuration is legal, but the fact that it's unusual could explain the next point....
  • Your grub.cfg file shows no evidence of a Windows entry, which is consistent with what you're reporting. Creating a fresh GRUB configuration file might fix this problem. Typing sudo update-grub in Ubuntu will create a new configuration file; however, whatever problem caused Windows to not be detected before might persist and prevent it from being detected again. Thus, this procedure might be ineffective. Running Boot Repair is a more radical possible solution; this re-installs all of GRUB. Again, it's not guaranteed to do any better, and there's a small chance that it will actually make matters worse.
  • Another approach is to bypass GRUB. There's evidence that you tried my rEFInd, but you don't say whether it worked or why you abandoned it. In any event, rEFInd is usually better at detecting and launching Windows than is GRUB, so it's worth trying (again). You can try rEFInd on a CD-R or USB flash drive as a test if you don't want to (re-)install it on your hard disk, then install it to your disk only if you're satisfied that rEFInd is working.

So in sum, I recommend you try your choice of rEFInd, update-grub, or Boot Repair, in increasing order of riskiness. (rEFInd is least risky if you try it from a USB flash drive or CD-R, and slightly more risky if you install it to your hard disk.) I also strongly recommend you disable your CSM, no matter what other solution you attempt.

Rod Smith
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  • Thank you @RodSmith I downloaded the rEFInd utility, installed with Ubuntu Software Center but I am not able to see it anywhere when I restart my system!! So I tried to follow your guide but I am stuck trying to find the correct procedure to it. Do I copy the .deb into the /boot/efi/EFi or first I unpack it into a folder and then copy its contents recursively? This is the rEFInd I am using. – Sanjay Bist Sep 08 '15 at 12:50