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I had windows vista installed on my laptop and installed ubuntu 12.04 next to it, everything worked, then i installed ubuntu 13.10 and it worked. A few weeks ago i wanted to install 14.04 alone on the machine but it ended in

"Operating System not found"

I tried to fix it, followed many suggestions i could google, used boot-repair, tried to fix grub manually, but nothing helped. Finally i even exchanged my harddisk becuase i thought - maybe something is just broken.

Now i intalled a 120GB SSD, followed the default installation instructions again but the same problem. The installation completes successfully and after reboot

"Operating System not found"

Here my latest result from bootrepait: http://paste.ubuntu.com/8015123

I burned a installation DVD from Ubuntu 14.04.1 64 bit image My Notebook is a Fujitsu Siemens Amilo Si 3655 Centrino / 64 bit / Intel Core2Duo P8400 2.26Ghz / 4GB Ram / installed 120GB SSD / Intel GMA450 graphics.

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  • Update: I tried to install another ubuntu based distribution and chose linux mint >> same problem. Aug 13, 2014 at 11:00
  • Update 2: Tried to install Ubuntu 12.10 and do dist-upgrades to 14.04 but still got the same error, then i booted from live cd again to fix mbr/grub but no success. Does anyone have an idea? I need to get my notebook working again. It seems Ubuntu 14.04 or GRUB2 damaged my MBR on 2 hard disks now :( Aug 13, 2014 at 11:03

1 Answer 1

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Finally i managed to boot, here is what i did: (i dont know what exactly solved the problem)

  1. Install Ubuntu 14.04.01 with manual partitioning
  2. create own partition for boot (ext4)
  3. install and reboot -> still same error
  4. insert boot-repair disk (not ubuntu live cd, the preconfigured ubuntu package with boot-repair)
  5. repair mbr - with repair partitions checked
  6. after the next reboot i got a slightly different error
  7. boot again from boot repair disk and executed the recommended repair rebooted and finally grub showed up

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