Edited grub - cant boot LL

[gold_finger]

I forgot to mention that i made windows the Grub_Default, so please tell me how i can use a live usb to fix my mess.

That's what I had assumed you did, which is why I suggested you temporarily change the default back to LL.  To change it back to LL default, when you edit the grub file again with gksu leafpad /etc/default/grub command in my prior post, make sure the GRUB_DEFAULT= line equals 0.  It probably equals "4", or "Windows" right now.

I was just pointing out that it was possible to fix from live dvd/usb if you accidentally got stuck only being able to boot into Windows (if you forgot to change the default back to LL).  It's actually not that hard, but would need some further info from you to provide accurate step-by-step instructions.  If you really want those instructions before you proceed with steps above, boot into LL, open a terminal and enter these two commands:

Code:

lsblk
sudo parted -l

Copy/Paste the full output of those back here and I'll be able to give instructions from that info.

Maybe worth mentioning also that i have a single hard disk, with only windows and LL. I tried installing LL again but i couldn't figure out how to replace the existing LL installation instead of alongside it, so if that is an easier solution i will also appreciate your help on that.

Thanks very much once again.

I've been operating on the assumption that as of right now your computer boots, shows the grub menu with Windows as the first option and LL second, and that you can boot into both of them without any problem.  You've been trying unsuccessfully to hide the grub menu so computer boots straight to Windows for others in household and they don't get confused by seeing a "weird" grub menu.  So, as I understand it, your only problem has been the lack of success in trying to hide the menu.  Is that indeed where things stand?  Or, is there some other problem?

You should not need to reinstall LL unless there is some other issue going on that I don't know about.  If you follow instructions in my prior post that will solve the hiding of the grub menu problem and you'll be all set.

It seems to me that changing the GRUB timeout values to zero would prevent GRUB from showing up.

Forgot to answer your question torrydale.  Yes, you would think that would work, but apparently it doesn't because something in the 30_os-prober script (under /etc/grub.d) resets it back to showing the menu for 10 seconds.  The solution I copied from one of the posters in OP's link basically runs a new custom script (50_hidemenu), which gets invoked after 30_os-prober, to set it back to hiding the menu.

The other solution is to edit the 30_os-prober script and change the offending code.  Problem with that solution is that the change will disappear and problem reappear whenever there is an update to grub.  So adding the custom script is the better solution in my mind.