View Full Version : Getting Dual-boot to work on (non?) UEFI system.

January 28th, 2015, 09:51 PM
This is the first time I'm working on a Laptop with UEFI so bear with me. I'm gonna bullet-point this to make it quick:

- HP Envy 6
- Windows 7 Preinstalled
- Default BIOS setting: Legacy Support - enabled, Secure Boot - Disabled.

I'm guessing this means Windows 7 has been installed in Legacy mode i.e. without UFI.

So dual booting should be straightforward like the old days right?

I install Ubuntu using the following method:

- Deleted HP_TOOLS (waste partition)(Due to 4 primary partition limitation)
- Shrunk Windows partition by 50gb
- Created 10GB Swap and 40GB ext4 '/' partition for Ubuntu

The installation finishes unsuccessfully with:

Cannot install grub on /dev/sda: fatal error during installation

Now if I boot my computer, I straight away get a Windows screen asking for the installation CD to do startup repairs (no sign of grub). So the end result is I have neither Windows nor Ubuntu working.

Can someone wiser help me out here? What could be going wrong?

January 29th, 2015, 03:59 AM
Cannot install grub on /dev/sda: fatal error during installation

There could be two possible reasons:
1... Check the integrity of the downloaded ubuntu.iso with SHA256Sum Check (https://help.ubuntu.com/community/HowToSHA256SUM). If the check fails then you will have redownload the .iso. Try re-burning the .iso to the DVD/USB.
2... There could some corruption on your HDD. The output of the following should give us a hint:

sudo parted -l
sudo fdisk -l