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Old 11-12-2012, 01:12 AM   #1
GNewbie
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Distribution: (U/K/X)buntu 6.1 (newer box) / D*mn Small Linux (older box)
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UEFI Turned Off Dual Boot


Hi All,

I can't dual boot Ubuntu and Win7 with UEFI. I followed the vaious tutorials and they simply don't work on my HP box. I'm usiing 64-bit, I get the correct Ubuntu bootloader, but when I try to load the LiveCD or Install I get a blank screen that never goes away.

Therefore, I want to try to turn off UEFI and try to boot 32 bit Ubuntu using the BIOS.

I would give it a try without posting here, but I'm concerned that I could still damage the Win7 boot loader system.

Is this a valid concern? If so, what do I need to do to avoid jacking the Win7 boot loader.

Also, does my /boot partition need to be within a certain range from the beginning of the disk? My HD is 1 TB.

Any related or other guidance is much appreciated.

TIA...
 
Old 11-12-2012, 04:50 AM   #2
malekmustaq
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Quote:
I can't dual boot Ubuntu and Win7 with UEFI. I followed the vaious tutorials and they simply don't work on my HP box. I'm usiing 64-bit, I get the correct Ubuntu bootloader, but when I try to load the LiveCD or Install I get a blank screen that never goes away.
This is becoming a common problem today since the turn of EFI and UEFI based hardware. You can still dual boot with any proprietary OS's. Continue reading.

Quote:
Therefore, I want to try to turn off UEFI and try to boot 32 bit Ubuntu using the BIOS.
That is the best option to do. So far to my experience there are those good companies that provided manual switches to turn OFF Uefi from the bios: Asus, Acer, Hp, etc.


Quote:
I would give it a try without posting here, but I'm concerned that I could still damage the Win7 boot loader system.

Is this a valid concern? If so, what do I need to do to avoid jacking the Win7 boot loader.

Valid. For if there is no manual switch to turn off the UEFI from the board, chance is that installing gnu/linux/nix OSs can pose unwanted difficulty.


Quote:
Also, does my /boot partition need to be within a certain range from the beginning of the disk? My HD is 1 TB.
Any related or other guidance is much appreciated.
Our venerable computing tradition is the BIOS configuration. Come the EFI and UEFI (Unified Extended Firmware Interface) that bears a bias to certain OS's (another serious solution born out of proprietary interest). This forces us to accommodate certain compromise with the hardware.

Regarding efi and uefi's, I think we are forced to provide the first 2MB after the MBR for the GPT records. Your MBR stays (yet) but meantime the first partition I created was only a 2MB non-formatted (it's up to the firmware to use that for UEFI records). This is what I did to my two UEFI mobo's and eliminated all possible problems. Also leave the last 2MB's partitioned but non-formatted --the first 2MBs and the last 2MBs, these are all required by the GPT which is the partitioning scheme adopted by the uefi's. Having left those two areas you can proceed to partition the hard disk as usual and control your MBR as usual. I can't explain fully why, but this worked for me and it gave me peace of mind.

Hope it helps.

Goodluck.
 
Old 11-12-2012, 09:55 AM   #3
GNewbie
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So, if I understand correctly, I leave the first and last 2MB partitioned but not formatted and when I set up GRUB there is no way I will damage my Win7 UEFI boot process (this assumes UEFI is turned off and I'm trying to boot Linux. If I want Win7, I'll enable UEFI and boot Win7).

I assume that "not formatted" is as simple as not selecting a format type when I create the partition. Also, does gparted allow me to move the location of partitions? Is it drag and drop from the visual representation of the partitions?

TIA...
 
Old 11-12-2012, 11:08 AM   #4
malekmustaq
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Quote:
So, if I understand correctly, I leave the first and last 2MB partitioned but not formatted
Yes.

Quote:
and when I set up GRUB there is no way I will damage my Win7 UEFI boot process
In my case I noticed under 'cfdisk' <command> that before the 1st Partition <Windows 7 partition> there were few MB's in-between the MBR and the 1st Partition: yet I did not trust that report. What I did was remove Win 7 first and Deleted the 1st Parition (I simply wanted to control everything between the MBR and the 1st Partition, I do not rely on redmond people automatically fixing what space there is in the area). After being assured that 2MB was between the MBR and partition one (1), I installed Slackware on partition one, all good with Grub 2, saved the MBR by 'dd' <command>, another image of the 1st 3MB's also I made just in case my method fails, then I installed Win 7 only in the second (2nd) partition, far away from the uefi strap.


Quote:
(this assumes UEFI is turned off and I'm trying to boot Linux.
All these done without UEFI, being switched "Off". ASUS and ACER comfortably offers a manual switch off from the bios.


Quote:
If I want Win7, I'll enable UEFI and boot Win7).
There is no need. Win7 runs chain-loaded by my Grub (v.2.0). Just as usually done by Gnu/linux guys under the BIOS tradition. I am running a dual boot with win7 WITHOUT UEFI. Take note, and you can do it also.

(( FYI: I am not running Win7 for myself but only for singular purpose brought in by an uncontrollable cause: business... a government recently <where we do business> only accepts a tunneled entry by way of internet explorer (certainly this we cannot allow to play with a browser floating over wine) it is different there. So we are forced to maintain at least one machine solely to run an internet explorer to connect to that government network. ))

It might take another space of years before UEFI becomes acceptable among us: the GPT method is very annoying and the drive/partition names have to be labelled to human language in order to manipulate partitions. GPT names UUID are machine generated and a paranoid trying to manipulate in between 10 partitions is surely wont to err. I don't even permit UUIDs in my /etc/fstab --that is silly and not actually helpful to a desktop user, let it apply to universal servers in the web, but not within my toys.


Quote:
I assume that "not formatted" is as simple as not selecting a format type when I create the partition.
Yes.


Quote:
Also, does gparted allow me to move the location of partitions?
Yes. As smooth sliding as a car window. And as sure as you are sitting there.


Quote:
Is it drag and drop from the visual representation of the partitions?
No way. It is your hard drive, the flesh and bones of your system:
--understand what you are doing;
--THINK before doing;
--do not let your finger move until IT IS A MATTER OF DECISION;
--put your soul into every action;
--concentrate.

Drag and drop developed in the computing industry to cater to the need of either too busy or too lazy people. D & D <usually but not all> is intended for some people who abdicated their right of choice to proprietors. Under Gnu/linux/nix system you must learn to control your system. Download and make this a guide as you progress in this world.

Good luck.

Last edited by malekmustaq; 11-12-2012 at 11:29 AM.
 
  


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