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My laptop is HP 655.

I had Windows 7 installed in UEFI mode, then I installed Ubuntu 17.04 on another partition.

There was no option for Ubuntu in the boot manager, only Windows 7.

Then I used the BIOS recovery tool and now Ubuntu is the only one showing and I can't boot Windows 7.

How can I show the two boot options?

Yaron
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A_S
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  • Did you install Windows in EFI mode and Ubuntu in BIOS mode? –  Aug 22 '17 at 10:41
  • Please run the Boot Repair utility and select the "Create BootInfo Summary" option. (DO NOT click "Recommended Repair," at least not yet!) When asked whether to upload the report, click "Yes," and then post the URL provided here. This will give us more details about your configuration, which is required to base an answer on more than guesswork. – Rod Smith Aug 22 '17 at 13:06

2 Answers2

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I recently had a similar issue. My interim fix was to use rEFInd which worked really well. I use it on USB. If it picks up both OS, you can install it as your boot manager.

Jexodus
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For GRUB to be able to detect multiple OS's on a drive, you need to install the os-prober package alongside GRUB.

The steps for this would be:

  1. Install Windows to your drive first
  2. Install Ubuntu secondly
  3. Boot into your new Ubuntu system.
  4. Open up a new terminal session
  5. Run sude update-grub

If everything goes well GRUB should detect your Windows system and add it to the list of OS's to pick when you reboot your system. For more info refer to the official Ubuntu page and this thread on GRUB

Kris Stadler
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