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Thread: How to set NOMODESET and other kernel boot options in grub2

  1. #11
    Join Date
    Aug 2010
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    Nashville, TN
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    69
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    Ubuntu Development Release

    Re: How to set NOMODESET and other kernel boot options in grub2

    Woah, that's great. All the stuff I was wondering about lately. Could not figure out why Ubuntu gave no boot options any more. Thanks. You also helped because I am running Ub10.10 on a new Dell-Intelchipset laptop, runs great, only needed a wireless fix. But now trying to get it to run also via Persistent 8GB USB on my 2006 hp desktop, with its nVIDIA chipset, and offline. Walls everywhere on that effort. I can't tell you how many times I reinstalled it on the USB.
    things to do lists
    ... sudo nvidia-xconfig....pray a lot. Then throw it in my home desktop machine. Then add all my laptop's deb packages to the offline hp. I'll be surprised if it works! I can always use Mandriva on the hp though, it comes with working nVIDIA drivers. But I'd rather stick to one distro. My brain might spill open if I try to put too much Linux in it ....too late, goodnight.

    UPDATE:it didn't work.
    Last edited by Mike_tn; November 24th, 2010 at 02:03 AM.

  2. #12
    Join Date
    Sep 2009
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    1

    Re: How to set NOMODESET and other kernel boot options in grub2

    How to temporarily set kernel boot options on an installed OS (not wubi)

    To set kernel boot options, you must edit your grub configuration. You can do this temporarily for a single boot by entering the grub menu. If you do not get to see the grub boot menu after the bios automatically, you may have to press SHIFT key after the bios logo to get in to grub:



    Select the default ubuntu kernel (usually the top one), and rather than pressing enter, press E to edit.

    ------------------------------------------------------------------------------------------------------------------------------------------------
    I have a duel boot machine (Ubuntu 10.04 and Windows XP) DELL Precision M4400. Yesterday I updated my linux system and after that the screen goes blank after the grub menu if I choose to boot my linux. I see two options: Linux and Windows in the grub menu but when I highlight the Linux option and press "E" nothing happens. I booted my computer with a live cd of Ubuntu and then changed the etc/default/grub file of the already installed ubuntu OS. I have two questions now:

    1. Why did the "E" key did not work ?
    2. How can I run grub update of the already installed system.

  3. #13
    Join Date
    Nov 2009
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    North Vancouver
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    Edubuntu 14.04 Trusty Tahr

    Re: How to set NOMODESET and other kernel boot options in grub2

    Quote Originally Posted by adilrasheedonline View Post
    [SIZE=4]...I have two questions now:

    1. Why did the "E" key did not work ?
    2. How can I run grub update of the already installed system.
    It sounds like you are describing the Windows Boot Manager, not GRUB - in which case you cannot edit the entry and it wouldn't help anyway (you can confirm this by looking at the top of the screen - it will say Windows Boot Manager or similar). Which means you installed with Wubi... and there is a grub update out on 10.04 that is breaking wubi installs. Look at my comment here: https://answers.launchpad.net/wubi/+question/135755

    If you need more help I suggest you create a new thread as it doesn't relate to this one.

  4. #14
    Join Date
    Jan 2010
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    Re: How to set NOMODESET and other kernel boot options in grub2

    For those who might be interested, here's my scenario:
    Dell Inspiron 17R, Ubuntu 10.04, would not shut down (hang) nore go into suspend (just did not do anything)

    Started adding stuff to /etc/default/grub and hereis what I got:

    nomodeset -> bombed and X would not start anymore. Had to remove it.

    acpi=off -> shutdown ok (fixed) but no sleep options anywhere. Almost there.

    acpi_osi=\"Linux\" -> perfect, everything works

    Thanks to the original poster
    rmcb

  5. #15
    Join Date
    Feb 2011
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    3

    hint worked for me, thanks

    I'm using Ubuntu 10.10 Kernel 2.6.35-25 on Lenovo Thinkpad SL300. The System failed at suspend to ram forcing me to do a cold start. Syslog said "ACPI: BIOS _OSI(Linux) query ignored" before freezing.
    I added acpi_osi=\"Linux\" to the boot options as described above and now it's working perfectly. Syslog says "ACPI: BIOS _OSI(Linux) query honored via cmdline" now

    Thanks a lot!
    Last edited by mackiecc; February 11th, 2011 at 07:47 PM. Reason: added changed syslog output

  6. #16
    Join Date
    Jan 2005
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    South Africa
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    Ubuntu 12.04 Precise Pangolin

    Thanks so much, just what I needed to be explained

    This was the last piece of info that I needed to get grub2 in Ubuntu 10.04 configured with nomodeset so I could get my Geforce 8400GS working.

    Thanks so much
    If you don't make backups of your important data, your data is obviously not important to you.

  7. #17
    Join Date
    Apr 2011
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    1

    Re: How to set NOMODESET and other kernel boot options in grub2

    after much angst #8 solved the problem for a dual gpu 4870X2 card as well. thanks!

  8. #18
    Join Date
    Jun 2008
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    17

    Re: How to set NOMODESET and other kernel boot options in grub2

    Hi,

    The best workaround for solving backlight ISSUE was for me:

    Autorun "setpci -s 00:02.0 F4.B=00" each boot.

    Steps:
    1) edit rc.local

    Code:
    gksudo gedit /etc/rc.local
    2) Add the command before EXIT 0

    Code:
    setpci -s 00:02.0 F4.B-0
    3) Restart.

    You should now be able to boot in UNITY where nomodeset was unable.

  9. #19
    Join Date
    Mar 2010
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    USA
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    Ubuntu Development Release

    Re: How to set NOMODESET and other kernel boot options in grub2

    If you don't mind, I referenced this thread from this sticky:
    http://ubuntuforums.org/showthread.php?t=1743535

    I think they go together hand-in-hand.
    Multi-Boot= Various flavours of Windows, Linux and Unix... Ubuntu user # 33563, Linux user # 533637
    Sticky: [all variants] Graphics Resolution- Upgrade /Blank Screen after reboot
    Boot Info Script courtesy of community member meierfra

  10. #20
    Join Date
    Nov 2008
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    1

    Re: How to set NOMODESET and other kernel boot options in grub2

    Hello,

    I have an old HP Vectra VL420 with 1.5GB memory and ATI Rage graphics card.

    I can't upgrade from 10.04 to 10.10 or install 11.04 from CD.

    The restart, for 10.10, after installation hangs with a black screen and for 11.04 the installations hangs with a black screen after displaying the word "UBUNTU" with moving dots below it.

    I have tried interrupting the boot process and when I press the function keys the choices are displayed, like noapic, nolapic when I press F6. But none of them has really helped me to boot the system.
    Any suggestions will be greatly appreciated.

    ===================

    Since I posted the above, I haven't received any suggestions. But since I managed to solve my problem, I thought it is worth adding the following for the benefit of any with the same problem to try.

    I came across the post by MAFoElffen (http://ubuntuforums.org/showthread.php?t=1743535) and with the suggestions in the post I managed to install
    Ubuntu 11.04 directly from Ubuntu 10.04 using a LiveCD.
    All I needed to do was interrupt the boot as outlined in the post, get into the grub and boot with the boot option xforcevesa!

    It only took me to 3 days to install Ubuntu 11.04!

    Good luck.
    Last edited by klpsr; May 14th, 2011 at 07:57 PM.

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