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Thread: 12.04.2 Live CD UEFI problems.

  1. #1
    Join Date
    Dec 2010
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    Question 12.04.2 Live CD UEFI problems.

    My new laptop (Compaq CQ45) comes preinstalled with Windows 8.

    I've managed to disable Secure Boot and to access the Grub menu from the live CD. Upon clicking "Try Ubuntu" (With added parameter nomodeset), it seems to start just fine. The problem is that about 30 seconds through the splash screen freezes.

    What could be the problem? Thanks.

  2. #2
    Join Date
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    Re: 12.04.2 Live CD UEFI problems.

    When you see the first Ubuntu screen, press F6 for boot options, and remove the "splash" option (or something like that) from the command line. Then boot, and see how far you get, and when the screen says.

  3. #3
    Join Date
    Jun 2009
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    Chicago Suburbs
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    Ubuntu 14.04 Trusty Tahr

    Re: 12.04.2 Live CD UEFI problems.

    I may need other boot parameters, or nomodeset is not correct.
    Or download was not correct, check md5sum, did you download 64 bit version?

    What are specs?

    How to set NOMODESET and other kernel boot options in grub2 - both liveCD & first boot, but different
    http://ubuntuforums.org/showthread.php?t=1613132
    https://help.ubuntu.com/community/BootOptions
    http://askubuntu.com/questions/16207...have-to-fix-it


    https://help.ubuntu.com/community/HowToMD5SUM

    You will need to use the 64 bit version of 12.10 or 12.04.2 and from the UEFI menu boot the flash drive in UEFI mode. That way it will install in UEFI mode.
    Systems need quick boot or fast boot turned off in UEFI settings. Vital for some systems. Best to backup efi partition and Windows partition first.
    Use Windows Disk Tools to shrink Windows main partition, but not to create any new partitions, if installing on same drive.
    https://help.ubuntu.com/community/UEFI
    https://wiki.archlinux.org/index.php/UEFI
    As of 12.04.2, it is possible to install on UEFI systems with Secure Boot enabled (using signed versions of Shim, GRUB, and the Linux kernel). This is only currently set up for Ubuntu (desktop, alternate, and server) and Edubuntu images due to pressures of time; we expect to enable it across the entire Ubuntu family for 12.04.3. Details:
    https://wiki.ubuntu.com/PrecisePango.../UbuntuDesktop


    Oldfred on vacation. Back Sept 9. Will not have much if any Internet access.
    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.







  4. #4
    Join Date
    Dec 2010
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    Re: 12.04.2 Live CD UEFI problems.

    Quote Originally Posted by sanderj View Post
    When you see the first Ubuntu screen, press F6 for boot options, and remove the "splash" option (or something like that) from the command line. Then boot, and see how far you get, and when the screen says.
    Thanks, sorry for the late reply, it says that Windows is already hibernating and it can't use the NTFS drive. Should I create an ext4 partition before hand? I'll try that now.

  5. #5
    Join Date
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    Ubuntu 14.04 Trusty Tahr

    Re: 12.04.2 Live CD UEFI problems.

    You need to turn fast boot off. A few computers can only get into UEFI from Windows and if Windows does not boot, you have a brick.

    WARNING for Windows 8 Dual-Booters
    http://ubuntuforums.org/showthread.php?t=1953674
    It defaults shutdown to a hybrid hibernation/off state for fast boot
    http://www.kapilarya.com/how-to-enab...p-in-windows-8
    But then files may be corrupted similar to Windows 7 Hibernation:
    http://ubuntu-with-wubi.blogspot.ca/...rid-sleep.html
    http://superuser.com/questions/14472...te-w-dual-boot
    Oldfred on vacation. Back Sept 9. Will not have much if any Internet access.
    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.







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