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Thread: Booting issue on Ubuntu 13.04

  1. #11
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    May 2013
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    Re: Booting issue on Ubuntu 13.04

    So, to make sure.
    Since my previous installation have damaged the generic Mbr that i had (am I right?), I should use boot repair to restore it on /sda.
    When looking at the diagnostic that I posted, I saw no boot loader in the MBR of sda. Is that what caused the booting issues.
    Just wainting for confirmation now.
    Processus: Using boot-repair:
    Select restore Mbr. At this point in the Mbr options must I keep in the "partition booted by the mbr" choice, sda2 which is my / ("linux core partition")?
    Lauch the repair. Boot-repair will restore my mbr, uninstall grub from its current location and then reinstall it into the Mbr.
    Finally, my computer should boot on my Mbr which will boot the ubuntu partition.
    Sorry if it takes time but I 'm quite strarting from scratch here when it comes to Ubuntu.
    Also thanks for helping!

  2. #12
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    Ubuntu 16.04 Xenial Xerus

    Re: Booting issue on Ubuntu 13.04

    The new UEFI does not use the MBR, it uses folders in the efi partition for booting. It needs the new gpt partitioning to boot, but gpt has a protective MBR just so old disk tools see a partition table not an unformatted drive that they may damage.

    The 30 year old BIOS uses the MBR which is just the first sector on a drive.
    Ubuntu will boot from a gpt partitioned drive with either UEFI (with efi partition) or BIOS (using MBR).
    Or it will boot from a MBR(msdos) partitioned drive with BIOS.

    You do have to have UEFI/BIOS set to the mode you want either UEFI or BIOS but also have to boot Ubuntu installer in the mode you want. Live installer offers either UEFI or BIOS boot and then installs in that mode. But the selection is only from the UEFI menu as you boot installer.
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  3. #13
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    Re: Booting issue on Ubuntu 13.04

    I know that I can change the UEFI to BIOS in my Bios in boot section.
    However I don't remeber having had the choice when booting the installer.
    As far as I remember the first menu I get give me 4 choices: Try without installing; Install; check cd for errors; a fourth one I can't remember. When in the install I haven't seen any pages mentioning the UEFI or BIOS.
    Practically what should I do to make my computer stop booting in UEFI mode? Firstly, change it in the bios so goes from UEFI to BIOS/legacy.
    Secondly? Run boot-repair so it restores my Mbr partition on the first section of my HDD ?

  4. #14
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    Re: Booting issue on Ubuntu 13.04

    Once you get to the Ubuntu install or live mode menu you have booted in either BIOS or UEFI mode. It is from the UEFI menu that you should see two choices to boot flash drive. One is UEFI and the other Legacy/CSM/BIOS or whatever. Then that is how it installs. Maybe if your system is set for CSM, then it will only boot flash in BIOS mode? Some still give both alternatives.

    But however you install if it does not boot, Boot-Repair should be able to fix. It can also convert a UEFI install to BIOS or a BIOS install to UEFI if drive is gpt partitioned and you have either or both the efi partition and the bios_grub partition.
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  5. #15
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    Re: Booting issue on Ubuntu 13.04

    Ok.
    So for now I will run boot-repair. I will see what happens and report it here.

  6. #16
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    May 2013
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    Re: Booting issue on Ubuntu 13.04

    Mmm.
    Nope.
    Afer using boot repair succesfully (so it said) I rebootted my computer. After my usual efi bios page I got a black one. Actually a console if not for the fact that I couldn't write in it.
    Also I went into the bios to see if i could choose to boot my Usb stick another way. Actually I can't change it from UEFI. There is no menu allowing me to do so.
    Should I restore my Mbr even when I can't boot from a gpt partitionned drive with BIOS.
    Here is the link:
    http://paste.ubuntu.com/5655412/

  7. #17
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    Re: Booting issue on Ubuntu 13.04

    You are still configured for UEFI boot. You have no boot loader in the MBR and have a mount of the efi partition in fstab.
    You should be able to boot in UEFI mode with secure boot off?

    Do you get a grub menu or you will not normally get grub menu as you only have one system installed. Does hoelding shift or escape from UEFI give you grub menu.
    If so it may be a video issue.
    What video card/chip do you have?
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  8. #18
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    Re: Booting issue on Ubuntu 13.04

    When I boot from my USB stick, it is wrtitten that the secure mode is off.
    When I boot froom my HDD without my USB in I get to the console (blach screen with the typing pointer) wich allows me no action. So I have to shut down my computer and restart.

    My video chip is : Gallium 0.4 on AMD PALM
    I checked for it and it runs well with ubuntu 10.04 and 10.10. So it more likely isn't the issue.
    Also it my paste link it is written that there is a boot loader installed on my Usb stick and none on the mbr of my HDD. I take it it must be installed in efi in my case so I might be wrong but can that change anything or is the boot loader the one from the live cd?

  9. #19
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    Re: Booting issue on Ubuntu 13.04

    The old Ubuntu installs do not even have UEFI, so they would be BIOS if the even work. Usually they are too old to have the newer drivers required by UEFI systems.

    I do not know AMD.
    ATI/Radeon ----------------------------------------------------
    https://wiki.ubuntu.com/X/Troublesho...riverDetection
    Ubuntu Precise Installation Guide - AMD/ATI
    http://wiki.cchtml.com/index.php/Ubu...#Video_Tearing
    Add Hardware Graphics - ATI: After installing ATI Driver: From QIII
    http://ubuntuforums.org/showthread.php?t=2050320

    edit
    I did not recognize Gallium, so I assumed AMD, it may be nVidia?
    http://ubuntuforums.org/showthread.php?t=2107105

    If nVidia then nomodeset should work.
    Last edited by oldfred; May 11th, 2013 at 10:42 PM.
    For more info on UEFI boot install & repair - Regularly Updated :
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to change to [Solved] when/if answered completely.

  10. #20
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    May 2013
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    Re: Booting issue on Ubuntu 13.04

    Sorry. Not beeh here for some time.
    Actually when i press Escape ( or SHIFT, actually both) I get a simple menu which allows me to choose between my HDD and then :
    1) USB device
    2) UEFI USB Device
    Since I used to launched in UEFI I picked the first one.
    I was half surprised in fact when I saw that the same occurs as when I boot on my HDD with my USB stick (live Ubuntu) in it.
    So how come my Ubuntu version which was installed on my HDD boot from my USB device? This even though I am booting in EFI mode and I have one EFI partition on my HDD. Shouldn't it be bootable at least? I mean the HDD without the USB stick with live Ubuntu on it.
    I'm wondering now if my USB stick is ok. I may should have begun by this but I'm going to create another USB live and try to reinstall. Also I'll be very careful on wich version I'll install.
    I'll surely do it by this evening so I'll post to tell you the changes it may bring.

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