View Full Version : [ubuntu] cannot boot ubuntu along with windows8

February 7th, 2013, 07:39 AM
I have a windows8 desktop. core I5 1Tb harrddisk and 16 Gb Ram. I try ton install ubuntu 12.10. It seem smooth on installation. But when I re-start no boot option on the screen. The computer always start winth Windows8.

I search in google and found a recommend to re-install grub. I boot with live USB drive and try to install grub.

sudo grub-install /dev/sdathe result is

Path `/boot/grub' is not readable by GRUB on boot. Installation is impossible. Aborting.
I search in google with the error message but still not found the solution.

some one tell me That we cannot install another OS on windows8 system ??

Thank for every suggestion

February 7th, 2013, 08:51 AM
How did you reinstall grub?

Was it like this

mkdir /mnt/root
sudo mount -t ext4 /dev/sdaXX /mnt/root
sudo mount -t proc none /mnt/root/proc
sudo mount -o bind /dev /mnt/root/dev
sudo chroot /mnt/root /bin/bash
grub-install /dev/sda
update-grubReplace sdaXX with your linux partition probably of ext4 format if not then change to what you have used so for ext3 replace ext4 with ext3

Using the live usb run up gparted to check where linux is installed to get the correct partition before trying to fix it

February 7th, 2013, 12:23 PM
Thanks for your reply.
I don't know exactly how to install grub. I only type

sudo grub-install /dev/sda
and get the error message above

now I follow your suggestion but get error after the :grub-install /dev/sda:
as I copy it below

ubuntu@ubuntu:~$ sudo mkdir /mnt/root
ubuntu@ubuntu:~$ sudo fdisk -l

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x114123e6

Device Boot Start End Blocks Id System
/dev/sda1 * 2048 976762879 488380416 7 HPFS/NTFS/exFAT
/dev/sda2 976762880 1465142271 244189696 7 HPFS/NTFS/exFAT
/dev/sda3 1465143294 1953523711 244190209 5 Extended
Partition 3 does not start on physical sector boundary.
/dev/sda5 1920227328 1953523711 16648192 82 Linux swap / Solaris
/dev/sda6 1465143296 1920227327 227542016 83 Linux

Partition table entries are not in disk order

Disk /dev/sdb: 4141 MB, 4141875200 bytes
128 heads, 62 sectors/track, 1019 cylinders, total 8089600 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0001ea0e

Device Boot Start End Blocks Id System
/dev/sdb1 * 62 8086783 4043361 c W95 FAT32 (LBA)
ubuntu@ubuntu:~$ sudo mount -t ext4 /dev/sda6 /mnt/root
ubuntu@ubuntu:~$ sudo mount -t proc none /mnt/root/proc
ubuntu@ubuntu:~$ sudo mount -o bind /dev /mnt/root/dev
ubuntu@ubuntu:~$ sudo chroot /mnt/root /bin/bash
root@ubuntu:/# grub-install /dev/sda
source_dir doesn't exist. Please specify --target or --directory

what should I do next ?

February 7th, 2013, 12:55 PM

The issue might be due to UEFI. Try the solution given in this link:



February 7th, 2013, 05:35 PM
After read and try suggestion on http://askubuntu.com/questions/22502.../225031#225031

I still cannot find "Ubuntu listed" in boot tab on msconfig.
And when type "uefi" in start screen it cannot not found the uefi.

So I think it is not my case.

February 7th, 2013, 06:51 PM
Best to see your exact configuration. Also is system an Ultrabook?

Post the link to the BootInfo report that this creates. Is part of Boot-Repair:
Boot Repair -Also handles LVM, GPT, separate /boot and UEFI dual boot.:
You can repair many boot issues with this or 'Create BootInfo' report (Other Options) & post the link it creates, so we can see your exact configuration and diagnose advanced problems.
Install in Ubuntu liveCD or USB or Full RepairCD with Boot-Repair (for newer computers)