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shanks_prime
April 17th, 2014, 11:51 PM
I have run into the same problem, but with Windows 7. I have an Asus G75 with 1.5TB (2x750GB) hard disk. After installing Ubuntu, Windows wouldn't load and keeps throwing me back to Grub. Following is the boot-info. I would rather not reinstall windows. And the recovery option(F9 for my model of laptop) doesn't seem to work either. The current boot-info results are: http://paste2.org/bPVCwXxw

oldfred
April 18th, 2014, 01:06 AM
Moved to your own thread as yours is Windows 7 not Windows 8.1 and solutions will not be the same.

You show two efi partitions on sda. Remove boot flag from sda3.
With gpt and UEFI boot, the boot flag can only be on the efi partition. It was with BIOS boot that boot flag would be on the Windows boot partition.

You also have ubuntu on sdb in a MBR partitioned drive.
But you show you are booting with UEFI.

And it gives this error among many others.
Wrong GRUB version detected.
I think it is getting confused about a MBR type install using UEFI boot from another drive.
Generally you can only boot from gpt drives with UEFI or UEFI must have gpt drive. You must have the UEFI version of grub booting in UEFI mode and somehow it still is working to have main install on MBR drive.
But you could or normally would just install grub to MBR of sdb and boot it in BIOS mode.

Best choice is to backup sdb, and convert it to gpt partitioning. YOu may be able to convert in place but still need good backups.
Converting to or from GPT
http://www.rodsbooks.com/gdisk/mbr2gpt.html
You then need to use gdisk to convert from gpt to MBR
http://www.rodsbooks.com/gdisk/mbr2gpt.html#gpt2mbr

Converting from MBR to gpt:
http://ubuntuforums.org/showthread.php?t=1454252
Windows convert from gpt to MBR. Besure to have good backups - srs5694
http://ubuntuforums.org/showthread.php?t=1718966