grub installation problems with GPT and UEFI (Ubuntu 12.04)
Hello,
I’m a Ubuntu user since 2008. I’ve buy a new computer, a Asus Zenbook Interl i7 with GPT partition modality UEFI, Windows 7 as default o.s. (unfortunately). Hybrid HDD with SSD
I’ve tried to install Ubuntu 12.04.1 (in dual boot with win), but Grub doesn’t run. Here what I’ve done:
- I’ve created USB Ubuntu boot disk and I’ve ran in not-UEFI modality (bios can run USB in UEFI modality but USB Ubuntu boot disk disk won’t to run in this modality)
- Installed root on SSD (sdb1); home and swap on HDD
Automatic installation can’t install grub in every logical partition (eg sda1, sda2, etc), so I’ve tried it in manual modality (reading a lot of forums…):
- I’ve created a partition ext2 with 2mb of free space, flagged as bios_grub (with gparted)
- Partitions are those:
* HDD
• Sda1: [EFI] FAT32 Windows starter (boot)
• Sda 2: NTFS Windows main partition (C:)
• Sda3: EXT2 (bios_grub) 2mb
• Sda5: EXT4 /home
• Sda6: NTFS Windows second partition (used for data)
• Sda7: Windows resume partition
* SSD
• Sdb1: EXT4 /
- I’ve executed, from a Ubuntu usb boot disk, as chroot on sdb1, grub-install /dev/sda (I’ve also tried /dev/sda1). Screen said: grub installed, no errors
…but, once rebooted, screen shows starting Windows, but no grub appears on it. Why?
Thanks for your support
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