Page 1 of 4 123 ... LastLast
Results 1 to 10 of 38

Thread: Ubuntu dual boot

  1. #1
    Join Date
    Oct 2010
    Beans
    214
    Distro
    Ubuntu

    Ubuntu dual boot

    I just updated/upgraded my dual boot Win 8 toshiba laptop to Win 8.1. I was running Ubuntu 13.10


    I now boot directly into windows. I don't get Grub at all. I assume the MBR was overwritten when I upgraded.

    How do I repair grub etc... I'm not sure if I can get into Ubuntu....

    Dennis

  2. #2
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Ubuntu dual boot

    If it was pre-installed with Windows 8, you do not have an MBR. With UEFI all boot loaders for all systems are installed to an efi folder.

    And from UEFI menu you set which folder to boot from, just like choosing which drive or device to boot. Windows updates probably changed default back to Windows. Boot into UEFI menu or use one time boot key to check that you still have an ubuntu entry to boot from. It may have turned secure boot back on also. If Ubuntu is in UEFI boot, not secure boot it will not show. Only secure boot installs will be shown when secure boot is on. Check that setting also.

    If so just change default in UEFI to boot ubuntu first.

    If you used Boot-Repair to fix a "buggy" UEFI, you may have to run that again. But that really is only for the few UEFI that will only boot Windows and will not let you boot an ubuntu entry from UEFI menu.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  3. #3
    Join Date
    Oct 2010
    Beans
    214
    Distro
    Ubuntu

    Re: Ubuntu dual boot

    Yes, yes you are correct; forgot about eufi.....

    I don't get any screen or options on boot, just directly to Win 8.1

    I checked and secure boot if disabled

    Win 8 was preloaded on the laptop.

    Thanks for the info so far..... should I try boot repair?

    d

  4. #4
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Ubuntu dual boot

    In UEFI menu do you have an ubuntu entry? With secure boot off?
    If not run Boot-Repair and post the link to the BootInfo report.

    If Boot-Repair offers to run its "buggy" UEFI rename do not run that yet. It seems to offer it too much, but may be required if you can only boot Windows and cannot in UEFI menu boot ubuntu. But not fully booting can also be additional issues like correct video parameters for your video card/chip or other issues.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  5. #5
    Join Date
    Oct 2010
    Beans
    214
    Distro
    Ubuntu

    Re: Ubuntu dual boot

    I do not get a boot menu for UEFI


    I ran boot repair....

    Under advanced options it gave me two choices...

    Reinstall Grub
    and
    Unhide boot menu

    Quit or apply


    This is the website output....

    http://past.ubuntu.com/6530708/

    I did not do any changes....

  6. #6
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Ubuntu dual boot

    Do you not get boot options somewhat like these screens from others?
    Attached Images Attached Images
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  7. #7
    Join Date
    Oct 2010
    Beans
    214
    Distro
    Ubuntu

    Re: Ubuntu dual boot

    Yes, when i enter set up .....

    I get the typical boot from CD, USB, HDD etc...

    I'm set up to boot from CD, then HDD and USB etc...

    D

  8. #8
    Join Date
    Oct 2010
    Beans
    214
    Distro
    Ubuntu

    Re: Ubuntu dual boot

    Ok, so I chose to run the boot repair. I did not rename the EFI file, I skipped over that step.

    I did get the output and the number is http://past.ubuntu.com/6531278

    I see that it did install grub and uhide something....

    However, it still boots directly to windows, no options for boot loader on windows or grub.

    D

  9. #9
    Join Date
    Oct 2010
    Beans
    214
    Distro
    Ubuntu

    Re: Ubuntu dual boot

    FWIW..... I have a similar problem with my desktop running 12.10 and win 8.1 upgrade.... however on that I do get the Windows boot loader blue screen and when I choose Ubuntu 12.10 I get a boot loading error from windows (dos kinda stuff).

    D

  10. #10
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Ubuntu dual boot

    Boot-Repair shows your internal UEFI choices. Not sure if this one is with secure boot on or off. If secure boot is on it will only show secure boot systems, so better to turn it off.
    But you have an ubuntu choice, which you have to select. It looks like it currently is the third boot choice in the boot order list.

    Code:
     BootOrder: 2002,0005,0004,0001,2003,2001
    Boot0000* EFI DVD/CDROM (TSSTcorp CDDVDW SU-208DB)	ACPI(a0341d0,0)PCI(1f,2)03120a00050000000000CD-ROM(1,6d576,11c0)RC
    Boot0001* Ubuntu	HD(2,200800,82000,6f11c71f-efd9-11e2-a5c4-e00cde495bcd)File(EFIubuntugrubx64.efi)RC
    Boot0002* EFI Network 0 for IPv6 (00-8C-FA-6E-06-D3) 	ACPI(a0341d0,0)PCI(1c,0)PCI(0,0)MAC(008cfa6e06d3,0)030d3c000000000000000000000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000RC
    Boot0003* EFI Network 0 for IPv4 (00-8C-FA-6E-06-D3) 	ACPI(a0341d0,0)PCI(1c,0)PCI(0,0)MAC(008cfa6e06d3,0)IPv4(0.0.0.0:0<->0.0.0.0:0,0, 0RC
    Boot0004* ubuntu	HD(2,200800,82000,6f11c71f-efd9-11e2-a5c4-e00cde495bcd)File(EFIubuntushimx64.efi)
    Boot0005* Windows Boot Manager	HD(2,200800,82000,6f11c71f-efd9-11e2-a5c4-e00cde495bcd)File(EFIMicrosoftBootbootmgfw.efi)WINDOWS.........x...B.C.D.O.B.J.E.C.T.=.{.9.d.e.a.8.6.2.c.-.5.c.d.d.-.4.e.7.0.-.a.c.c.1.-.f.3.2.b.3.4.4.d.4.7.9.5.}...1................
    Boot2001* EFI USB Device	RC
    Boot2002* EFI DVD/CDROM	RC
    Boot2003* EFI Network	RC
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







Page 1 of 4 123 ... LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •