How to dual boot win8 and kubuntu12.04.2 on acer S7-391?

[ianlini]

My laptop has pre-installed windows 8 in it,

and it seems to have 2 128G SSD running in raid0.



I have tried many methods to install kubuntu but still end up with the message:

No bootable device -- Please restart system

while booting.

It seems that no one has this problem when I tried to google.



And then all system in my laptop cannot start.



The steps I installed kubuntu:

At the first time of installing kubuntu, I don't have any knowledge about intalling on raid0 and UEFI.

So I thought I broke all the data on the ssd. And then I install the Windows 8 enterprise on it (with raid0 and UEFI).

The reinstalled Windows 8 seems to work well. So I try again to install kubuntu according to some articles.

1. shrink the size of the disk using the tool in windows 8.

2. make a live USB using kubuntu 12.04.2

3. use the USB to boot and install. I installed in efi mode.

4. while installing, there comes some problems.
Some articles advise to use the command

sudo dmraid -E -r /dev/sda
sudo dmraid -E -r /dev/sdb

before installing.

But that makes all things on the disk (includes the pre-installed windows8) disappear.
I wonder why many articles advise to do that? Is there any method to recovery?
So I didn't use the dmraid command

While choosing the partition to install, there are many /dev/mapper/....
But I can still find the free space that I have shrinked.
So I use that space to create 4GB swap and about 120GB ext4 for /
And I choose /dev/sda to put the boot loader because I don't know where to put it. Is it wrong?


4. The installation completed without any warning or error.
But after reboot, it can't detect any OS on the SSD just like the message I talked at first.
the grub menu didn't show up, too.

5. I tried to use boot-repair in the live USB kubuntu, but still the same reesult.

can any one help me?

[ianlini]

I fixed it!!

1. Just after I post this thread, I try to recovery the efi partition using the backup.
(I built this backup using macrium reflect after I installed windows 8)
And then the windows 8 can be detected while booting.

2. Use live USB kubuntu 12.04.2 to boot, and then use the boot-repair:

$ sudo apt-get install boot-repair
$ boot-repair

And then use the Recommended repair, enter some command it assigned.

3. Reboot

The grub menu then show up, and I can go to windows or kubuntu successfully!
I think the original problem is that I wrote the boot loader to the wrong place and cannot be repaired.
So, any advices where to put the boot loader while installation?

[ianlini]

But here comes some other problem:

After shutdown windows 8,
the keyboard not works at the grub menu.