apending "/boot/grub/grub.conf" file // need some help...

I-1 · #1 4th May 2005, 11:59 AM

Hi,

as a few allready know I am busy with setting up a MythTV box.
now I using this guide:
http://wilsonet.com/mythtv/fcmyth.php

In that guide in chapter 10 this piece of text is stated:

Quote:

We're going to make little modification to the kernel boot line in your grub.conf file that should force the ivtv frame buffer to load on /dev/fb1, as well as allow the ivtv-fb module to be loaded and unloaded. Without doing this, unloading the ivtv-fb module would probably crash your system. To the end of all 'kernel /vmlinuz...' lines in /boot/grub/grub.conf, append 'vga=791', then reboot your system. This tells the kernel to load a frame buffer for your video card at 1024x768, 16-bit color. I use this all the time myself, simply so I can see more when I'm not in X. I'd always done this on my 350-equipped box without even thinking about it, which could explain some of why I've not run into some of the problems other folks have...

Now this is an output of my "/boot/grub/grub.conf" file:

Code:

[root@MythTVBOX /]# more /boot/grub/grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE:  You have a /boot partition.  This means that
#          all kernel and initrd paths are relative to /boot/, eg.
#          root (hd1,0)
#          kernel /vmlinuz-version ro root=/dev/hdb2
#          initrd /initrd-version.img
#boot=/dev/hda
default=0
timeout=5
splashimage=(hd1,0)/grub/splash.xpm.gz
hiddenmenu
title Fedora Core (2.6.10-1.770_14.rhfc3.at)
        root (hd1,0)
        kernel /vmlinuz-2.6.10-1.770_14.rhfc3.at ro root=LABEL=/ rhgb quiet
        initrd /initrd-2.6.10-1.770_14.rhfc3.at.img
title Fedora Core (2.6.11-1.14_FC3)
        root (hd1,0)
        kernel /vmlinuz-2.6.11-1.14_FC3 ro root=LABEL=/ rhgb quiet
        initrd /initrd-2.6.11-1.14_FC3.img
title Fedora Core (2.6.9-1.667)
        root (hd1,0)
        kernel /vmlinuz-2.6.9-1.667 ro root=LABEL=/ rhgb quiet
        initrd /initrd-2.6.9-1.667.img
[root@MythTVBOX /]#

I know I can edit thid with VI but I don't understand where I need to put the 'vga=791' part.

Can someone help me?

Thanks,

jim · #2 4th May 2005, 12:49 PM

Quote:

[root@MythTVBOX /]# more /boot/grub/grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd1,0)
# kernel /vmlinuz-version ro root=/dev/hdb2
# initrd /initrd-version.img
#boot=/dev/hda
default=0
timeout=5
splashimage=(hd1,0)/grub/splash.xpm.gz
hiddenmenu
title Fedora Core (2.6.10-1.770_14.rhfc3.at)
root (hd1,0)
kernel /vmlinuz-2.6.10-1.770_14.rhfc3.at ro root=LABEL=/ rhgb quiet
initrd /initrd-2.6.10-1.770_14.rhfc3.at.img

change to this

Quote:

[root@MythTVBOX /]# more /boot/grub/grub.conf
# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd1,0)
# kernel /vmlinuz-version ro root=/dev/hdb2
# initrd /initrd-version.img
#boot=/dev/hda
default=0
timeout=5
splashimage=(hd1,0)/grub/splash.xpm.gz
hiddenmenu
title Fedora Core (2.6.10-1.770_14.rhfc3.at)
root (hd1,0)
kernel /vmlinuz-2.6.10-1.770_14.rhfc3.at ro root=LABEL=/ vga=791
initrd /initrd-2.6.10-1.770_14.rhfc3.at.img

That should do the trick

also you can remove the oldest kernel
list em out with

Code:

 rpm -q kernel

then remove with this

Code:

 rpm -e kernel-2.6.9-1.667

I-1 · #3 4th May 2005, 12:55 PM

Hi,

So I can just remove this:

Code:

rhgb quiet

Where is "rhgb quiet" for anyway?

Thanks,

jim · #4 4th May 2005, 01:01 PM

redhat graphical boot
the splash screen durring your boot

when you make your change you want o make a back up as well like so

Quote:

# grub.conf generated by anaconda
#
# Note that you do not have to rerun grub after making changes to this file
# NOTICE: You have a /boot partition. This means that
# all kernel and initrd paths are relative to /boot/, eg.
# root (hd1,0)
# kernel /vmlinuz-version ro root=/dev/hdb2
# initrd /initrd-version.img
#boot=/dev/hda
default=0
timeout=5
splashimage=(hd1,0)/grub/splash.xpm.gz
hiddenmenu
title Fedora Core (2.6.10-1.770_14.rhfc3.at)
root (hd1,0)
kernel /vmlinuz-2.6.10-1.770_14.rhfc3.at ro root=LABEL=/ vga=791
initrd /initrd-2.6.10-1.770_14.rhfc3.at.img
#------- In case I screw up---------------
#kernel /vmlinuz-2.6.10-1.770_14.rhfc3.at ro root=LABEL=/ rrhgb quiet
#initrd /initrd-2.6.10-1.770_14.rhfc3.at.img

so if the system hangs when it boots you plop in the rescue CD mount your install and edit grub.conf
by putting the # symbol infront of the offending kernel line

I-1 · #5 4th May 2005, 01:11 PM

Hi,

Thanks for your answer ...I have 2 more questions,
When I remove "rrhgb quiet" it will not show me the graphical boot anymore right?
Is there a way that I still see the splash screen durring my boot TOGETHER WITH the vga=791 option?
Or am I totally talking crap here?

And when my system gets screwed up...
1)I know where I can download the rescue CD
2)I DON'T know how I mount my install as you stated:

Quote:

plop in the rescue CD mount your install

How do I do that?

Thanks for your answers,

jim · #6 4th May 2005, 01:27 PM

not sure if you can use the rhgb && vga=791 tiogether try it and see what happens

as for rescue

put in the linux rescue CD
at the command promt type

Code:

 linux rescue

answer yes to the questions
once it finds your system install
you want to mount it

Code:

 chroot /mnt/sysimage

you now have control of your system

Code:

 vi /boot/grub/grub.conf

make your changes
type exit and 3 finger salute it ALT-CNTL-DEL
then try again