Ubuntu Installation :: Unable To Boot - Rebuilding GRUB
Nov 21, 2010
through a series of mistakes i have managed to take a working system and make it unable to boot. my two objectives right now are to back up my data, and to make my system bootable. here's how i got here. i used the Upgrade Manager to upgrade to 10.04 thinking it would solve a problem i was having with my previous installation. when that had completed i found I was unable to boot into 10.04. The system would hang after echoing the message "checking battery state." I attempted to rebuild my grub file, thinking this would solve the 'battery state' problem. this was a mistake. I ended up deleting it, and now there's no menu.lst file in its place.
currently when i boot up normally (i.e., with no Live CD) I automatically go into the rescue mode. so far i haven't managed to enter a command that rescue mode recognizes. alternatively, i can boot from the installation CD for Ubuntu 10.04. per this page: [URL] I take these steps:
1. boot from the installation CD.
2. go into terminal
3. type these commands:
[Code]....
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Feb 1, 2010
I started out with a RAID 0 of 3x 500GB drives. Partitioned to a 200gb Windows 7 install (plus the 100mb partition), a 50gb partition I was going to use for Ubuntu 9.10, and the around 1081GB NTFS storage partition. It wouldn't work, I tried a bunch of things, EasyBCD, ect, rebuilding grub, and everything else... wouldn't work for me. So I gave up, backed up everything and then rebuilt my RAID into to "separate" drives so that I could just change the booting drive depending on the flavour of frustration I was looking for at the time. Installed W7 back, installed Ub9.10 back. Windows loaded through it's drive fine. Ubuntu will not freaking load. So I ran a script I found laying around on one of the many.... MANY posts I read and will attach the outcome.
[Cide]...
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Aug 9, 2010
The problem is I've set up a dual boot with Xp and Ubuntu 10.04. Ubuntu was working fine till 2 days back but now when I select Ubuntu from the grub screen i get a whole lot of numbers next which it'll say Usb drive or sd card reader etc.. these go by quickly and then the comp stops running. If i press enter on the keyboard I get Initramfs and then i can type but nothing happens even if I type reboot. if I press cntrl+alt+F2 then i get a blank screen with flashing cursor. Same with recovery mode. Windows boots fine. The grub2 screen comes fine. The last thing i did before this happened is reconfigure the grub2 screen, but it seems to be fine (i had added a background img and reordered the boot options) I did not edit grub.cfg. I would prefer not to reinstall it as iv done it a half a dozen times already in the last few weeks..
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Apr 10, 2010
I upgraded from grub to grub2 recently, and during an update of my system, it ran the update-grub command which prompted a window asking me where to install Grub. Since I didn't know what partition to install it to and the help suggested to install it to all if I was unsure what partition to install it to - I accidentally installed Grub to my Windows partitions (both the regular and the recovery console).
So now, I can't boot into Windows - the computer just hangs after Grub with a blinking cursor and I have to perform a hard reset. Is there any way for me to restore the boot record for the windows partition without having to reinstall windows from the ground up?! I can't use Linux for my webbanking and other important tasks, so (unfortunately) I need Windows back desperately!
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Jun 13, 2010
I have accidentally started the recovery OS of my netbook, and messed-up grub. I can start the Netbook from a live CD, but I do not manage to restore grub to anything useful. Below the outcome of the Boot Info Script I have found in the forum:
Code:
Boot Info Script 0.55 dated February 15th, 2010
============================= Boot Info Summary: ==============================
=> Grub 0.97 is installed in the MBR of /dev/sda and looks on the same drive
in partition #5 for /boot/grub/stage2 and /boot/grub/menu.lst.
=> Syslinux is installed in the MBR of /dev/sdb
[code]....
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Oct 1, 2010
I have win 7 and F13 installed on my computer but I am having trouble setting up dual boot so I can choose to boot F13 or win 7. I have tried to set up grub, how to install grub and set up a dual boot so I can use F13.
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May 17, 2010
I recently performed a reinstall of ubuntu after mucking up my partitions, and I am running it dual booted with windows 7.
I recently performed a grub-pc update, but I didn't know what it was asking me to do during the process itself of updating the process.
It asked me at one point where to install grub, and I selected all my partitions because it suggested that if I didn't know. I think that may have damaged my windows section, which was also selection.
I've attached the output for:
Code:
Problem symptoms:
1) Weird upgrade error in apt-get
2) Unable to boot windows 7
3) Unable to activate proprietary drivers
4) Perpetually being reminded to restart
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Jul 24, 2010
yestoday,after I upgrade,unable to boot windows xp. if I use grub ,windows xp can boot up.but now I want to use grub2, boot info script's results.txt is at below.
Boot Info Script 0.55 dated February 15th, 2010
Boot Info Summary: => Grub 2 is installed in the MBR of /dev/sda and looks on the same drive in
partition #6 for /boot/grub.
sda1:
File system: vfat
Boot sector type: Fat16
Boot sector info: No errors found in the Boot Parameter Block.
[Code]....
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Sep 1, 2011
First, I know there are numerous threads on grub errors but I have tried all possible solutions and that's why I'm here. My issue is that I'm not able to boot from the grub prompt as described for installing grub from a LiveCD https://help.ubuntu.com/community/Gr...0from%20LiveCD. I can see grub is installed but is missing the kernal and other files. code...
I ran the boot_info script and the output is attached. From what I can tell it cannot even detect an OS being installed, but I've kept everything up to date and never had any issues. Everything was fine yesterday and now this. Also, I tried the Boot Repair CD and that did not work.
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Jan 19, 2010
I have/had a working system that took maybe 20seconds to boot. However due to an oops with hardware (power cable fell out) I lost 2 disks in a raid5...so I had to rebuild it, now the new partition wont mount on boot and it takes 180seconds Plus to get a control-d prompt. If I remove the mount from fstab and reboot and then mount manually after a normal boot its perfect and works....so it appears something in the boot/mount process is confused....
The q is where do I start looking to fix this?
I suspect its the LVM looking at the ext4 system and getting upset that its isnt LVM'd? Is that possible? The original partiton was /dev/i2o/hda1 and was not lvm'd and neither is the new....so i dont see why.. multiple 180 second timeouts!
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Sep 2, 2009
A failed upgrade, from disk images, of Fedora 10 to 11 resulted in no GRUB bootloader main menu appearing on bootup (no WIN, no LINUX choices from which to boot). I am booted directly into the GRUB command shell...so, no WIN, no LINUX, nothing. And my understanding of GRUB shell commands is very low.I have 2 hard disks, WIN on the first, LINUX on the second. I believe GRUB Bootloader is on the first disk.Sadly, I have no external install media.An old grub.conf hardcopy indicates that root =/dev/sdb2, root (hd1,0), kernel /vmlinuz....olderversion...(relative to /boot),initrd /initrd...olderversion... (relative to boot). and WINDOWS on (hd0,1), with chainloader +1
I need to somehow get past this grub shell, and re-install/re-instate the grub bootloader, so it can boot normally.What grub command(s) must I use? I've played around with the commands, but with no success.I worry that if I can't resolve this, the whole machine may be useless.
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Mar 23, 2011
I had a dual boot system with 3 partitions, Windows 7 on one partition, and Windows XP on another partition and a Data partition. I decided to load Ubuntu 10.10 on the Windows XP partition.During installation I selection manual partition, and deleted Windows XP.after successful completion of Ubuntu installation "Grub" directly boots into Ubuntu, it doesn't show me the OS selection screen. After following some forum posts I did an update grub
Code:
Generating grub.cfg ...
Found linux image: /boot/vmlinuz-2.6.35-22-generic
Found initrd image: /boot/initrd.img-2.6.35-22-generic
[code]....
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Aug 18, 2010
Dual Booting my laptop and unable to change the Boot Records on the drive. Not because I dont know how, but my primary OS will fail to boot(win7).
I have drive partitioned as follows...
sda1 = Win7 system (default install)
sda2 = Win7 Main (default install)
sda3 = swap
sda4 = Extension (I think thats what its called)
sda5 = / (ext4)
What I need is a boot cd or perferably Grub installed on a 256MB Thumb drive with the options to load the installed system from sda5.
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Jul 8, 2011
I am new to Linux. I have installed RHEL 5.4 on my PC with preloaded Windows XP.
Windows was set as the first boot kernel. So if i do not choose which OS to be loaded it will load Windows by Default.
Today I got an error saying GRub Loading Stage2 read error.
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Jan 2, 2011
Here are 2 questions
1.In the last line of the debian kernel handbook 4.2.2 Applying patches
It is possible to apply extra patches to the source before starting the build. First, you should apply the existing patches by running:
You will then find the patched source in the subdirectories debian/build/source_arch_none (default) and debian/build/source_arch_featureset (featuresets added).
You should apply the extra patches in the appropriate subdirectory. where can I find the "extra patchies" and how to do?
2.Even though More than 8 hours have passed, 4.2.3 Building many packages
To build all possible packages for this architecture, run:
To build all architecture-dependent packages, run:
To build all architecture-independent packages, run:
The 1st command still working. what is the all possible packages? and what I am doing?
I am just trying to rebuild debian linux kernel 2.6.26-2, Did I misunderstand?
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Dec 22, 2010
The first is I seem to have 3 GRUB installs. So whilst I update the one from my live session, the change does not appear in the boot up menu. I had installed 10.10 from a CD into a different partition (sda6), but that will not boot, so I have just deleted this and done another grub install and update. The kernel I am using has just been updated from 10.04 to 10.10 too, and it is this that I use and the Grub I have been working on (sda5).
[Code]...
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May 2, 2011
I installed 11.04 after Windows 7. when the GRUB boot menu starts up there is an option for Win 7 boot but it will not boot windows. When that option is selected the screen changes colour for 2 seconds and then reverts to the GRUB menu. Ubuntu boots fine.I downloaded the Boot Info Script and ran it, the results are
Code:
Boot Info Script 0.55 dated February 15th, 2010
============================= Boot Info Summary: ==============================[code].....
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Dec 16, 2010
I updated yesterday and now when I start my laptop it goes in to grub rescue mode. I have booted from a 'live cd' and thought I could repair grub from there. In gparted however the partition with ubuntu (sda1) is seen as unknown file system, in terminal when I list the partition table it shows up as FAT16 type. When I try a grub-install it gives this error message:
[Code]....
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Mar 4, 2011
I have 2 hard disks. sda,sdb
In sda, I have 4 partitions, and I have windows 7 in one of the extended partitions [not in the primary partition].
In sdb, I have 3 partitions. 2 for storage, and 1 10GB drive for Ubuntu. Again, Ubuntu is not of a primary partition.
I had ubuntu 10.04 running on that for a long time. However, I wanted to reinstall ubuntu and use 10.10.This is what I did EXACTLY:Booted from Ubuntu install CD
Chose advanced istall
Selected sdb3 for Ubuntu
I installed GRUB2 on the SAME partition as Ubuntu aka sdb3 Installed then rebooted
I can boot into Ubuntu fine, but whenever I select Windows 7 bootloader from the GRUB menu, the screen goes black, and my PC reboots.
Boot Info:
Code:
Boot Info Script 0.55 dated February 15th, 2010 [code]....
ls: reading directory sda6/: Input/output error
I have tried the testdisk/update-grub method, but it didn't work.
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Mar 26, 2010
So my computer has ubuntu 9.10 installed 1st and I want to install win 7 in a separate partition. Basically, ubuntu 1st, win 7 later so far from what I learned from search results, grub 2 have problem with win 7 installed later and what was recommended was install win 7 before ubuntu. how ever I do not have the time to start over again because there are too many things to back up or install again. can I simply revert grub 2 to grub 1 again and resolve the problem?
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Apr 20, 2010
I've been dual booting ubuntu and xp for about 2 months now. i booted this morning and all i get is this grub menu. i saw the grub vs. grub2 page but have no idea even where to start.
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Sep 21, 2010
I was installing sqeeze i386 on my laptop VOSTRO 1400 and got this the 'grub-pc' package failed to install into /target/. without the GRUB boot loader, the installed system will not boot.
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Mar 23, 2010
I had a dual boot machine with fedora 12 and windows vista and I could use grub boot-loader to switch between two. Few days ago windows got corrupt and I have to reinstall it. I put windows 7 now and as usual it erased grub. So to reinstall I put the fedora 12 installation CD on and followed some usual setup steps. When I got the command line I issued the command "grub-install /dev/sda" (sda not hda because It showed bunch of sda, sda1..) but surprisingly it said grub command not found. I remember doing it before while it worked fine.
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Nov 27, 2010
I decided to install Ubuntu on my desktop after the setup went well on my laptop and I liked the OS. I already had Windows 7 and Backtrack 9 installed on my HDD, so when I was in setup I took the 200gb partition for BT9 and formatted SDA5 to ext3 with "/" as the root. Then checked "format" and selected SDA5 from dropdown list and continued to install.Everything went smooth in the installation and I was prompted to reboot which I did assuming I would soon see a GRUB screen. Instead I got an error saying
"Grub loading stage1.5.
Grub loading, please wait...
error 15"
and then the computer just freezes. I've tried to boot from CD but I just get "CD-ROM Boot Priority ...Boot Ready" and then after about 30 seconds it tries to boot from the HDD and I get the same error.I've read that I need to configure GRUB somehow but I have no idea how to do that and I can't boot anything from a CD because it just waits and then jumps to the HDD. I guess what i'm asking is if there is a way to configure GRUB from the BIOS menu or make it possible to be able to boot from a CD.
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Jan 2, 2011
I am able to get into GRUB and boot Linux, but whenever I select Windows, all I get is an error about a missing boot loader.
After the Windows install disk failed to repair it, I reinstalled the Windows system and then used the Ubuntu live-CD to restore GRUB in order to be able to boot into Linux again. Now I have the same problem as when I started (although the error screen is somewhat different now).
Does anyone know how to break this "evil circle" of mine?
I am using the 10.10 (GRUB 2 in other words).
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Sep 2, 2009
I installed windows and haven't been able to boot to fedora since. Without a boot disk my machine complains 'BOOTMGR is missing'. If I use a boot disk to access grub on another linux partition (/dev/sda5) I can try to boot my fedora install using its old grub.conf settings. However this gives me the grub error:
Code:
root (hd0,0)
Filesystem type is ext2fs, partition type 0x83
kernel /boot/vmlinuz-2.6.29.6-213.fc11.x86_64 ro root=UUID=63608748-e626-4a3f-9232-c836524f606f rhgb quiet
Error 2: Bad file or directory type
Darn grub thinks the file system type is ext2fs - this makes me think windows might have written something (perhaps its bootloader) to the first partition rather than the MBR.
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Mar 30, 2010
i had installed linux on my 40 IDE hard disk drive now i want to install xp on then linux, but i am not able to boot any cd now, that grub problem is coming again and again.THIS IS WHAT I DID BUT COULD NOT FIND THE SOLUTION1.I formatted entire hard disk by connecting it to second computer fully formatted took me almost 1.20 minutes to format still nothing happend to that grub problemthe only way i could install xp on that 40 gb ide hd was to connect it to 2nd pc and install xp on it,but then when i connected this hd to first one i could install linux on it but xp was giving some popups windows as now the motherboard had changed on this 1st pc
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Sep 2, 2010
I have recently purchased a new laptop, which came with Windows 7 pre-installed. I immediately installed Ubuntu alongside it with a dual boot. At first it worked fine, but when I restarted after the first time I used Windows, I ended up with an 'Operating system not found' error. I was able to reinstall the Grub bootloader using an Ubuntu Live CD, which appeared to fix the problem, but the next time I loaded Windows 7 and rebooted, the problem reappeared I think the problem is that Windows 7, for whatever reason, is somehow removing or disabling Grub.
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May 27, 2011
When I turned on my laptop today, instead of showing me the boot menu..it show grub command line..ie
Code:
grub>_
I have no knowledge about grub command line..still i tried to boot into my fc14 ..using these steps given here
[Code]...
Thus boot configuration files have been lost..i think I have to install Fedora again
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Jun 11, 2010
I have installed latest kubuntu (10.04) on sda7, ext4 , and i selected the advanced feature of the installer to install kubuntu bootloader on sda7. 11.1 is on sda5 .First , it destroyed my 11.1 grub bootloader on mbr . I managed to restore it with the 11.1 installation DVD. Now i try to boot kubuntu from the sda7 bootloader, without success . I searched the forums and tried some hints i found but found no similar problems. Here are the different entries i tried on grub (mbr) , content of the /boot/grub/menu.lst :
Code:
# Modified by YaST2. Last modification on ven. juin 11 15:41:32 CEST 2010
default 0
timeout 3
gfxmenu (hd0,4)/boot/message
##YaST - activate
[Code]...
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