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I have a dual boot system (Windows 8.1 and Ubuntu 14.04.02), However recently I have changed my motherboard and since then I am getting an error. I have reinstalled both of my operating systems and followed these but it was still no use:

I have tried installing lilo by using a live-disc which gave me access to Windows, but if I reinstall Ubuntu I get the same error at startup again. I want to get back to the grub2 boot menu so that I can access both Windows and Ubuntu. this is how it looks: http://i.ytimg.com/vi/zwed_1NqAZI/maxresdefault.jpg
(sorry couldn't upload an image)
and here is the link after performing boot repair: paste.ubuntu.com/10739355/

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Irsham Ali
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  • This may be helpful: https://www.linux.com/learn/tutorials/776643-how-to-rescue-a-non-booting-grub-2-on-linux/ - read the "booting from grub-rescue>" section in particular (I would read all of it). –  Apr 04 '15 at 08:31
  • Also see http://unix.stackexchange.com/a/168689/100763 –  Apr 04 '15 at 08:31
  • error : unknown file system in 3out of 4 and error: failure reading sector 0x2 from 'fd0' – Irsham Ali Apr 04 '15 at 09:53
  • possible duplicate of [How can I repair grub? (How to get Ubuntu back after installing Windows?)](http://askubuntu.com/questions/88384/how-can-i-repair-grub-how-to-get-ubuntu-back-after-installing-windows) – David Foerster Apr 04 '15 at 11:53
  • no @David Foerster ..I installed Ubuntu after windows ..its not that issue – Irsham Ali Apr 04 '15 at 13:40
  • The answers to that question don't just apply to the part of the question title between parentheses. Did you try to run Boot-Repair as recommended per one of the answers? If so, I'd like to see the log file to maybe find some more hints to the cause of the issue. – David Foerster Apr 04 '15 at 13:42
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    You don't explicitly say what error message you're seeing. Reporting the *exact* error message is important to even begin debugging problems. If necessary, take a photo with a digital camera and post it as part of your question. – Rod Smith Apr 04 '15 at 15:48
  • I have updated the log file and screenshot check it if needed – Irsham Ali Apr 05 '15 at 11:15

2 Answers2

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What I would if I were you, based on the information your provided:

  • Boot from a live CD
  • Back-up my data
  • Format the hard drive
  • Reinstall Windows in BIOS mode
  • Reinstall Ubuntu in BIOS mode
  • Restore my data
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Fabby
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  • thanks for the solution ,it worked.. but any idea what could have been the reason for this problem? – Irsham Ali May 17 '15 at 21:20
  • When you change the motherboard of the computer you change a lot of things at the same time... So it's just easier to reinstall and change all modules then to try and find the single module in your old set-up that was causing the problem... – Fabby May 18 '15 at 07:38
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Does your HDD have a recovery partition before the ESP?

On some UEFI systems, it requires a recovery partition at the beginning of the drive and the ESP as the second partition. and of course gpt partition tables for UEFI.

ravery
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