4 Replies - 795 Views - Last Post: 26 August 2013 - 01:59 PM

#1 The_Programmer-  Icon User is offline

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Dual Boot Linux and Windows

Posted 23 November 2012 - 04:10 PM

I currently have Windows 7 64-bit. I used Ubuntu before and I loved it. I need to install it again to check the cross-platform performance of programs I'm making. Last time I installed it, when the computer started up I would get a black screen for two minutes then Ubuntu would finally boot. I heard this is a problem with the resolution settings. My screen is 1360x768 using a Radeon HD 7750 1GB GPU. Also, Since the screen is black I never get the option to boot to Windows. Could you help me please?

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Replies To: Dual Boot Linux and Windows

#2 The_Programmer-  Icon User is offline

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Re: Dual Boot Linux and Windows

Posted 23 November 2012 - 04:17 PM

Also, the black screen says "Resolution Not Supported" or something like that. I think that's my T.V. printing the message.
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#3 Atli  Icon User is offline

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Re: Dual Boot Linux and Windows

Posted 23 November 2012 - 04:54 PM

Even though the screen is unable to display the boot menu, I can't see why it wouldn't still work. Did you ever try just pressing the down button a few times right after the resolution warning starts to display, and then hit enter?

As far as the resolution of the boot screen, GRUB can be configured to change that. The first answer in this page describes a method I've successfully used in the past myself. (Though I never had to do step 1. I knew the resolution I was after.)
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#4 no2pencil  Icon User is online

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Re: Dual Boot Linux and Windows

Posted 30 November 2012 - 06:07 AM

Why not set grub to 800 x 600 or something simple?
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#5 temp_0001  Icon User is offline

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Re: Dual Boot Linux and Windows

Posted 26 August 2013 - 01:59 PM

I don't use the linux bootloader to load my operating systems. I use the Windows boot loader. If you can't find a solution to your problem, then I greatly recommend that you use the Windows bootloader.
Here are the instructions to boot using the Windows bootloader.

Boot into Linux regularly or with a live CD/DVD

let's say you have windows on /dev/sda2 and linux on /dev/sda1
login as root
mount windows partition
copy linux boot information
unmount windows

$ sudo su
$ mkdir -p /media/windows
$ mount -t ntfs-3g /dev/sda2 /media/windows
$ dd bs=512 count=1 if=/dev/sda1 of=/media/windows/linux.boot
$ umount /media/windows
$ rm -r /media/windows



DO NOT USE RM -R IF UNMOUNTING FAILS

Boot into Windows (regularly or with dvd)
run cmd as administrator
> bcdedit /create /d "Ubuntu" /application bootsector
> bcdedit /set {ID} device partition=c:
> bcdedit /set {ID} path \linux.boot
> bcdedit /displayorder {ID} /addlast
> bcdedit /timeout 5



When you create a boot entry with bcdedit, you will see a string with numbers, letters, and dashes in curly braces. Copy the string including the curly braces and use that as the argument for "{ID}".

Dual Boot Windows & Linux

Now to deal with the problem you're having. If linux is on the same hard drive as windows, then you need to find a way to make Windows the first partition. (there is a way) If you have the installations on different hard drives, then change your bios to boot the hard disk with windows on it before the hard disk with linux on it.
If you can't find how to change the partitions, you can reinstall the OSes. I'll edit my post if I find out how to swap partitions.

How to Change Partition's Order

My computer has about 16gb for the windows and linux partitions each. The rest of the drive is setup as an ntfs partition where i keep some of my files. I use symbolic links to refer to data on the ntfs storage partition.

This post has been edited by temp_0001: 26 August 2013 - 02:09 PM

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