How to access root 9.10 to edit grub.cfg

**dougggg** · November 1st, 2009

I just did an install and need to edit the boot menu but the normal command

sudo gedit /boot/grub/grub.cfg

doesnt work it ask ofr my password and pulls up the editor but wont let me save, It worked with 9.04. I get an error:

You are trying to save the file on a read-only disk. Please check that you typed the location correctly and try again.

did something go wrong on the install or ...?

Thanks

**ikacer** · November 1st, 2009

I don't think you are supposed to edit that file. I found a thread explaining it here:
http://ubuntuforums.org/showthread.php?t=1278577

post #3 and #4 in the thread seems most useful.

**dougggg** · November 1st, 2009

why does ubuntu seem to get harder as I go. I need to add
'vmalloc=512m' to the boot entry becuase I have a haupage tv card and my nvidia card needs that to work or it wont boot. I can do it every time at boot with the e command but thats a pain. I looked at the files in grub.d, can somebody point me in the right direction to put the vmalloc=512m

**retrow** · November 1st, 2009

I had problem saving it with gedit too. Instead of using gedit, I used nano -

Code:

sudo nano /boot/grub/grub.cfg

Its a text editor which is very similar to old school DOS editor.

Change the lines for config file within nano and then to save, its Ctrl-X --> Hit Y to save changes, and Enter to save it as the same filename.

Why it let me save changes with nano and blocked me out when using gedit is beyond the scope of my understanding. I just know that nano worked for me.

Also I have no clue where the vmalloc statement is supposed to go.

**lavinog** · November 1st, 2009

does this work:

Code:

gksudo gedit /boot/grub/grub.cfg

**kerry_s** · November 1st, 2009

in grub2 it's /etc/default/grub

gksudo gedit /etc/default/grub

on line #9:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash vmalloc=512m"

then save & run "sudo update-grub"