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Fix GRUB & Frozen System

asked 2013-01-06 16:44:48 -0500

oldngray gravatar image

updated 2013-01-11 01:34:13 -0500

Jomoos gravatar image

I had Fedora 17 running until it indicated Updates were ready. It began the download, got part way through and the system froze. Nothing worked, no mouse action registered. Finally I shut the system down. I also have Windows 8 in the boot menu. Three questions.

  1. How do I change the boot menu to default to Win8? and
  2. How do I get Fedora running again?
  3. How do I shut down Fedora, I can't locate any icon and the terminal won't let me process anything even with my admin password?

Fedora will start but freezes after just a few minutes. Update indicates everything is up to date but it is apparent something is missing or corrupted.

Please be easy on me, I'm in my mid-eighties but still would like to learn Fedora but maintain my Windows system until I know my way around Fedora.

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answered 2013-01-09 19:14:33 -0500

updated 2013-01-11 01:38:59 -0500

Jomoos gravatar image

Fedora installs GRUB, a bootloader, to the MBR. Changing the default boot entry isn't 'fixing the MBR' - nothing is broken here. Fedora's GRUB 2 Wiki has the information you need, but I'll summarize below. You'll need to open a terminal and run these commands, one at a time:

  1. get an admin session - be careful now!

    # su -
  2. update your software - this will probably take a while.

    # yum upgrade
  3. list options

    # grep ^menuentry /boot/grub2/grub.cfg | cut -d "'" -f2
  4. Choose your default entry

    # grub2-set-default <menu entry title>
  5. Make sure it worked!

    # grub2-editenv list

If you still have freezing issues after the update, or if you cannot update, it would be best to open a new, topical question. One issue per question makes support less confusing :)

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Thanks for cleaning up, Jomoos!

randomuser gravatar imagerandomuser ( 2013-01-13 16:39:03 -0500 )edit

answered 2013-01-09 16:44:03 -0500

dreamcastnate gravatar image

updated 2013-01-09 18:40:48 -0500

The easiest way to repair Fedora would be to wipe the partition and start over. To make Windows 8 bootable again, boot your computer from the Windows install disc. Once at the screen that has the 'install now' button, click the link that says 'repair your computer', select your Windows install and then open a command prompt, type 'bootrec/fixmbr' That will fix the mbr for Windows to boot, but will destroy the Grub bootloader if you installations are on the same drive. As I am still using Fedora 15, I am not sure about shutting down issues. To shutdown immediately, type 'sudo shutdown now'. Clicking your name in the top right hand of the screen holding the alt key will cause suspend to change to power off. I am also assuming that you admin password is the password you set up during the install and is also known as the root password. I am not sure about make the Windows bootloader work for both Winodws and Fedora. the most common and easier method would be to let Fedora's bootloader have the options for both installs. One last note, try installing the updates by opening a terminal and typing 'sudo yum update'. Hope you journey further into Linux gets better.


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The only good advice here is to run yum update ...

randomuser gravatar imagerandomuser ( 2013-01-09 19:04:31 -0500 )edit

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Asked: 2013-01-06 16:44:48 -0500

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Last updated: Jan 11 '13