Help needed with GRUB on Fedora 17

benettfreeman · #1 17th August 2012, 11:40 AM

Hello all and thanks in advance for looking at my thread.

Basically, my problem started when I ran the Update program soon after installation. The result is that the entry that reads "Fedora' on my boot menu starts a sequence that does not boot. There must be a problem with it. What exactly, I don't know.

However, if I choose 'Advanced Settings for Fedora', it offers me a further 4 entries: one for each of 2 kernels, plus their recovery modes.

If I choose one of these kernels, it doesn't boot. I am thinking that it's probably the one that is run by the default.

The other allows me to boot perfectly and use my OS without any problem.

WHAT I WANT TO DO:

1. Set my GRUB menu so that Windows boots by default (its my girlfriend's laptop and she doesn't like to have to select anything from a menu)

2. Put an entry into the first menu that boots successfully. I guess that removing the entry from the Advanced settings that fails to boot would mean that the only entry associated with 'Fedora' would be the working one.

My linux knowledge is fairly basic, and I certainly don't know much about GRUB. I would really appreciate if someone could walk me through what I need to do. Thanks.

sea · #2 17th August 2012, 12:39 PM

Boot your 'running' linux, open a console and then:

Prepare Menu entries

Code:

lsblk

With the information of this output, mount each partition that holds an OS you want to be able to select from GRUB menu. This includes the windows partition which contains C:\, and any further linux you might have installed on this device.
To mount windows, it might look like:

Code:

sudo mkdir /mnt/c
sudo mount /dev/sda1 /mnt/c

------------ this part may vary, i'm not on linux atm ------------
Prepare entrie amount
Open up /etc/default/grub, with

Code:

sudo nano /etc/default/grub || sudo vi /etc/default/grub

In this file, modify the "default" value, which refers to the default pre-select menu entry at boot.
Save the file and exit to console.
-----------

Prepare reboot
As a last action before you enjoy the new grub, you'll need to rebuild it with:

Code:

grub2-mkconfig -o /boot/grub2/grub.cfg

Enjoy

Hope this helps, at least to get started.

Rajtechi · #3 19th August 2012, 11:49 AM

With the latest grub-pc update, grub2 takes several minutes to get to the menu. During this time there is almost constant hard drive activity...this did not happen with the last update which would take 5 to 10 seconds at the most.

benettfreeman · #4 19th August 2012, 10:11 PM

OK I tried what the first responder wrote but it does not solve my issue. Can anyone else help me with this please?

I would like to remove one of the Kernel options from my boot menu if possible, or to install an alternative to GRUB. Thanks.

---------- Post added at 10:11 PM ---------- Previous post was at 01:02 PM ----------

This problem was automatically solved with the next batch of updates. Thanks anyway!