Software :: Grub Drops To Grub Prompt On Boot / But Can Use Commands To Find Menu
Jun 5, 2009
I've got myself the curious situation where, when I boot the system, I can get grub to start, but it always drops to the prompt.
I can run:configfile /grub/menu.lst
and this brings up the menu with no problems, and from there I can boot the system to either linux or windows. What I don't understand is why it wont go to the menu in the first place?As far as I can tell, grub/Kubuntu got confused when installing, as each of the hd#,# settings in the menu.lst have needed tweaking to let the system boot. (e.g. windows is actually hd0, but the original install had it at hd2. Likewise linux is on hd1, but the menu.lst had it at hd0). I've happily tweaked these to make the system boot, but would appreciate any help in convincing grub to actually load the menu without me having to use the prompt.
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Apr 17, 2010
I started another thread about this to get help booting into openSUSE after Fedora rewrote my bootloader and deleted all other entries. I managed to fix it but I never did find out why the following commands caused my system to boot to the grub shell instead of the grub menu.
Code:
grub
root (hd0,3)
setup (hd0)
quit
reboot
Can anyone explain to me why these commands caused my system to boot directly to a grub shell? It's as if there were no /boot/grub/menu.lst files for it to use, but after I got everything back to normal, the files were still there.
If it helps, this is how the drive was setup before and now, except Fedora was on /dev/sda4 and has since been deleted.
Code:
Device Boot Start End Blocks Id System
/dev/sda1 1 262 2104483+ 82 Linux swap / Solaris
/dev/sda2 263 13316 104856255 83 Linux
/dev/sda3 * 13317 14621 10482412+ 83 Linux
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Nov 1, 2010
I got ubuntu 10.04 lucid lynx along with windows (dual boot) and using Grub. On my computer, I have my C:/ (programs) and D:/ (data). I've never used my D:/ before that day that I've lost my windows partition on my grub menu. I usually use my D:/ with windows. The first time I used my D:/ to store data with linux, I lost my windows option in my grub menu. I'm not sure what I did wrong but I do want to restore my windows option in my grub menu.
After "fdisk -l",
I checked in /boot/grub and there is no menu.lst to modify. how I can get back my windows option in my grub menu ?
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Jun 20, 2011
I have installed BackTrack 5 and I have set GRUB up:
Code:
root (hd1,4)
setup (hd1)
However, the GRUB prompt appears at boot instead of the GRUB menu. However, when I boot from the Live USB, the GRUB menu works fine. Here are the contents of the grub.cfg:
Code:
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
# .....
The reason I want the GRUB menu to show up of because I would like to dual-boot BackTrack 5 with Windows 7.
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Jan 9, 2010
I have a Compaq Presario CQ60 with Nvidia GeForce 8200M graphics card. When I first installed Windows 7 followed by Karmic in dual boot I could boot into both OS. Now when I try to boot into Windows, it displays the Windows logo and then drops back to the grub menu. It may have started happening after Windows 7 installed updates. I tried reinstalling both Windows and Karmic again and it again worked initially but now Windows no longer boots. Does anyone have any suggestions about what may be causing this or how I can fix the problem without reinstalling?
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Mar 21, 2011
I have used CentOS for a while and have never run into this issue. I searched all over and didn't see a similar issue anywhere, I did an install of CentOS as a server (no GUI) with only the base. Partition is /boot ext3, size of 100MB. The rest of the drive is partitioned as / with ext3. This is being done on a CompactFlash card of 32GB in size. The BIOS sees it as an IDE drive.
When the install completes and the system reboots, the grub stops at the grub> prompt. There is no menu for OS options. If I do the following commands:
grub>root (hd0,0)
grub>kernel /vmlinuz-2.6.18-194.el5 root=LABEL=/
grub>initrd /initrd-2.6.18-194.el5.img
grub>boot
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Feb 5, 2010
I primarily need to remove several listings from my boot menu. After many updates and upgrades the list is HUGE.I know you can edit the grub menu.lst file, but I don't have one.
[Code]...
And, I did read the guide on removing entries from grub 2. The problem is, some of the kernels in the current grub menu are no longer in synaptic on this install. Currently I have WinXP, Ubuntu 8.10, and Ubuntu 9.10 installed. I want to leave 8.10 installed, but not have it available in the Grub menu. How can this be accomplished? Grub 2 seems quite obtuse compared to earlier versions where there was a simple menu file
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Feb 10, 2010
I seem to have determined a few other things about my "only gets as far as a GRUB command line" problem:To recap, sda3 (GRUB hd0,2) is the main Linux partition; sda9 (GRUB hd0,8) is the boot partition.GRUB is 0.92.Installation was from an 8.04LTS live CD (at least, that's what the envelope says it is)/"/boot/grub" (i.e., "/grub" on sd9/hd0,8) contains a "menu.lst" file. I modified it (had to do a "sudo gedit" from a command line!) to (1) comment out the line that hides the boot menu, (2) change the timeout from 3 seconds to 90, and (3) add a menu line based on my succesful manual IPL of DOS.
It still boots to a GRUB command line. If I do a "configfile /grub/menu.lst," a boot menu comes up. DOS will successfully IPL, but Linux still gets a "no setup signature found," (ditto for "recovery mode"), which suggests either a bad kernel, or a kernel that's too big for the GRUB to handle.Why would it be finding its way to grub, but not finding the boot menu file?Why would the live CD come up just fine, yet the GRUB and kernel it installs fail?
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Jul 4, 2010
I have XP on sda and Fedora 13 on sdb with Fedora's grub on the mbr of sda.
Everything's been working fine.
In particular, grub's boot menu has been intervening in the boot process
with options reflecting my entries in grub's menu.lst file.
I'm not sure what I did prior to this, but now my system boots to the grub> prompt.
I'd like to get my old menu back.
I know the command sequences to enter at this prompt to boot into either XP or Fedora.
I can boot successfully into XP but attempts to boot Fedora fail with the first command; namely,
grub>root (hd1,0),
the system responds with the error message "error 25: disk read error."
Does this mean my sdb has failed?
If not, please tell me what I should do to recover from this,
recover meaning to get the grub's boot menu to intervene once again
in the boot process.
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Nov 29, 2010
i am trying to change the boot order on the GRUB menu so that the countdown automatically starts on an older kernel. From what i can see all the solutions on the web want me to edit the /boot/grub/menu.lst file. The problem is that i don't have one. Someone also mentioned that if i don't have a menu.lst file then i should look for the grub.conf file. I don't have on of those either. The closest thing in /boot/grub is grub.cfg but that looks nothing like the descriptions i have heard of /boot/grub/menu.lst file
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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).
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Oct 30, 2010
I rebooted my computer recently after installing some updates in Ubuntu and now when grub launches it goes straight to the grub prompt and I don't get a menu. I tried searching around online and have tried what seemed like the most common fix but to no avail:
find /boot/grub/stage1 (returns hd1,0)
root (hd1,0)
setup (hd0) -I also tried (hd1,0) and (hd1)
-then reboot- (still get no menu and goes straight to the prompt)
I then tried booting into Ubuntu live, using apt-get to install Grub, and then running through the install process using similar commands, but to no avail. When I run setup it finds my config info and doesn't show any errors. I have a menu.lst file with lots of entries for different kernel versions and a windows 7 install on hd0,0. I am running Ubuntu Ubuntu 10.04.1 LTS, kernel 2.6.32-25-generic-pae.
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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:
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Nov 20, 2010
my Setup is Fedora 14 x64 + radeon hd 4830 i've downloaded .run package from ati site with latest driver for x64 systems. installed it, but didn't edited grub.conf becouse i didn't understood anything there (probably didn't spent enough time to get things understand) Now i've lost possibility to enter my Fedora system. during boot it lost it's modern blue boot screen (with filling drop), it was replaced by standard old boot screen with triple-color stripe. after this boot screen monitor start blinking going on and off. and on last step i'm getting "Fedora 14 boot bla bla bla something" on screen. nothing works except Ctrl+Alt+Delete. system reboots showing successful daemons shutting sequence. How can i edit grub menu from initial grub screen is it possible to it's own 'e' option or 'c' from grub command line?
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May 26, 2011
I dual boot Windows 7 and Ubuntu, and recently I updated from 10.04 to 11.04 via live cd. However, I now get the grub rescue prompt instead of the normal grub menu when I boot my computer.
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Jun 12, 2009
I'd like to say I'm very impressed with Fedora 11. I'm a long time Linux user and I've tried many distros. But, I usually keep only the best on my laptop. For a long time that was Ubuntu but, I think Fedora 11 has made some key improvements over Ubuntu and I'm eager to switch. The problem is: I haven't been able to run Fedora as anything other than on the Live CD. Everything works perfectly and it installs but, when I reboot, Grub begins. Instead of booting, however, Grub drops into its minimal shell and gives me a command line.
I've tried installing it a number of ways now and have read much about the problems with Ext4 on Grub and took special care to see that Grub has its own, separate, /boot ext3 partition. Even then, no luck. My hardware should work fine. I've got an HP DV-5 with 4GB RAM, AMD Turion 64-bit dual-core @ 2 Ghz, and an IDE 250GB hard drive. I'm working with the 64-bit Fedora 11 Live disc with KDE as the Gui.
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May 28, 2011
I've recently had trouble reinstalling my Ubuntu system as I was getting various unusual errors as described in my old thread here. I thought it was probably something to do with my RAID-0 array which was pre-installed on my laptop from purchase being corrupted or something like that (if it's possible). I decided to simplify things for myself (not understanding RAID arrays much) so I just removed the RAID array and installed Windows and Ubuntu on the now separate hard disks. It worked fine.
I noticed quite a significant performance drop, however, with even Ubuntu boots taking longer than 30 seconds despite my laptop being both high-spec and only a few months old. Windows, as you can imagine, was dreadfully slow. I wasn't entirely convinced that this was entirely due to the loss of the RAID array - as even low-spec laptops with presumably no RAID arrays are supposed to boot Ubuntu in under 30 seconds apparently - but I read that RAID-0 arra
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Jan 15, 2011
So I wanted to get rid of ubuntu 10.10 on my HP pavilion dv6 laptop as I wanted to make some hd space. Its a dual boot with windows 7. I deleted the ubuntu partition and expanded the windows partition to fill the whole hard drive again. When I restarted my laptop I got the "error: no such partition. Grub rescue>" message.
I tried inserting my ubuntu 10.10 boot cd but whenever I boot from the cd I get the exact same grub rescue error. Is it possible to remedy this situation from the error? I am currently unable to download a windows recovery cd so I'm stuck in the grub rescue page unless its possible to fix this mess from the error prompt.
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May 6, 2011
After certain system-wide changes, like kernels updates, I obtain grub prompt on restart. However, if I put the hard drive into another computer (b), it boots up fine. Since, however, I use the present computer (a) regularly, I only use b to purge and reinstall grub using the chroot method. However, doing so every time is time consuming; and I cannot change anything in the defaults and run update-grub without obtaining a grub prompt on restart. How do I fix this?
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Jul 28, 2009
I am testing my crash recovery strategy for my linux system and I am having trouble with GRUB. I am basically restoring my backup (i.e. tar) unto a different hard drive, but I am having problems getting the machine to boot without me having to type the GRUB commands at the GRUB prompt that is presented when the machine boots up off the new hard drive. I have tried to restore the MBR in two ways (the 2nd one is the one that gets me to the GRUB prompt):
1. Get the MBR off the original drive and write it unto the new drive (all via dd), but that did not work at all: the machine hangs right away during boot up. It seems to hang right at the point where the BIOS tries to read the MBR.
Code:
On original drive:
# dd if=/dev/sda of=mbr+part.bin bs=512 count=1
On new drive (new drive is now in place of original drive):
# dd if=mbr+part.bin of=/dev/sda bs=1 count=446 conv=notrunc
2. By using the FEDORA rescue CD, I installed grub unto the new hard drive as follows:
Code:
# chroot /mnt/sysimage
# grub-install --root-directory=/boot hd0
reboot and remove FEDORA CD Using the 2nd option above, I get the GRUB> prompt during bootup. I can then boot into the system by issuing the commands that are in the menu.lst file, followed by the "boot" command. However, I would like for those commands to happen automatically, just like in the original configuration. It seems to me that GRUB is actually finding all its stage files because I doubt the GRUB program (the one displaying the prompt) fits entirely in the 446 bytes it has on the MBR. So, it must be loading its stage 2 (and stage 1.5??) files from my /boot partition. However, if GRUB is loading its stage files off the boot partition, why does it not load/read the menu.lst/grub.conf contained in the boot partition also?
Code:
# ls -l /boot
total 22888
-rw-r--r--. 1 root root 1274567 2009-05-27 16:39 System.map-2.6.29.4-167.fc11.i686.PAE
-rw-r--r-- 1 root root 1274538 2009-06-16 22:27 System.map-2.6.29.5-191.fc11.i686.PAE
[code]....
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May 11, 2010
Two days ago I decided to migrate from Fedora to Ubuntu 10.04. On the Ubuntu install I chose to format the entire disk as I do not want a dual boot system. I have three disks and have set the bios to boot from dvd, then main disk, then 2nd disk, then any other bootable drive and coming from a working Fedora I know I have my "slaves" and "Master" pin positions on the disks set correctly.
When I try to boot the fresh install of Ubuntu I do not see any menu options, no boot image nothing, I get taken immediately to a grub command window and I dont know how to fix things from there. I have tried to fix things by booting into the "try before you 'buy'" thing on the installation cd and I can see that Ubuntu has been installed on the main disk, but all in all Im stuck.
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May 13, 2010
i have dual booted ubuntu with windows. but after a few days i realized that ubuntu was too slow for my system and then decided to uninstall it and planned on installing it later. So i deleted the partitions on which ubuntu was installed. I rebooted the system and the grub rescue promt appeared, i already knew the work around was to restore the windows MBR using the live cd i used to install ubuntu or the Windows installer. But the main problem is my DVD suddenly stopped working . So my question is, can i boot windows using the promt? is there any commands? or can i uninstall grub using the rescue promt?
My desktop has been down for more that two weeks
Ubuntu version: 10.04
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Jun 19, 2010
So I had Ubuntu Server installed and I decided to make some new partitions using gparted via a live usb of Ubuntu desktop. And so I think messed up pretty badly. Ubuntu Server won't boot and I get the following error followed by a grub rescue promt:
Code:Diskette drive 0 seek failure
error: file not found grub rescue >
To me, it seems like some boot files may be missing if not the whole system. After I made the partitions, the live USB of Ubuntu was still working fine until I rebooted.So here is the bigger issue, I figured I would just reinstall everything all over again, but instead I can't.
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Jun 30, 2010
upgrading my Karmic 9.10 to Lucid 10.4 I can't boot anymore to Linux only to Windows.My installation is a WUBI installation and I installed it on the only harddisk I have in the folder c:ubuntuNow when I boot I get a grub prompt and when I do LS I see hd0,msdos01 as partition.Now's I've tried to manual boot it by using the following commands from the ubuntu manual
set root=(loop0)
linux /vmlinuz root=/dev/sda1 loop=/ubuntu/disks/root.disk ro
after this command I get an error
[code]....
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Jun 7, 2011
I'm running Ubuntu within VMWare on a Macbook. I followed these steps [URL]... Recommended) to upgrade form 10.04 to 11.04, which actually upgraded to 10.10 first, and then a graphical upgrade brought me to the 11.04 upgrade, but then i ran into the problem where a grub> prompt appears when i start up the machine... nothing else happens. I found this thread [URL] which seemed similar to my problem, but the suggestions didn't work.
Code:
grub> ls
(hd0) (hd0,5) (hd0,1) (fd0)
grub> boot
error: no loaded kernel.
grub> linux
error: no kernel specified.
that's what I see. any way to resolve this without having to download the CD and start from scratch? It's grub 1.98, if that's important to know.
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Sep 3, 2010
I have installed ubuntu 9.10 after the windows xp os, and then my grub.cfg file only contained information about linux.. my windows os couldnot be booted..But thats fine because i now work only on linux, so I could normally boot into ubuntu..
But now i tried to install fedora 12 on that partition on which windows was installed, and i set the space of that partition as "free". And then something went wrong, and i could not install fedora.
Now wen i boot into the normal ubuntu linux from the local hard disk, this error appears on screen - "No bootable media present, enter bootable disk and press enter."
I can boot into the installed os by first booting from a live cd, and selecting the "boot from local disk" option. But i cannot boot without a live cd.
I also reinstalled grub-pc package, but no change.
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Mar 20, 2010
My parent's hard disc is failing and I am trying to boot into single user mode to run fsck. If I try to enter through terminal with "sudo init 1" the screen goes black and the computer freezes. I tried to enter single user during start-up with ESC, but the machine still boots straight into a normal session. I was going to edit /boot/grub/menu.lst to for the machine to display the grub menu option but I do not seem to have a menu.lst under /boot/grub. Does anyone have any ideas as to where this file might be or an alternate way to enter single user mode?
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Dec 4, 2009
I have openSUSE 11.2 and boot using GRUB. I was looking on start-up options for 11.2 and saw where it said
splash=silent
and
quiet showopts
I was wondering what they meant?
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Apr 17, 2011
I have a laptop with Windows 7, and about a week ago I installed Ubuntu 10.10 64-bit via LiLi USB creator. Worked beautifully, but I was having some issues with the brightness controls so I decided to get cute and upgrade to 11.04. So I downloaded the beta2 and used LiLi to make the USB (unsupported for that version of course) which used the same parameters as 10.10. I then tried to do a fresh install over the partition I had set aside for Ubuntu and had 10.10 installed on (~80 GB).
So in the installation itself, something got majorly screwed, and the entire system froze. Next thing I knew, I was rebooting and got the Grub Rescue prompt and no ability to load into either my old Ubuntu 10.10 or my new failed 11.04, or of course my Windows 7 partition either. The partition is obviously there, and as I only have one PC in my house, with no Windows 7 recovery discs, I currently cannot fix the mbr to just get my Windows back. I can of course get this in a couple days, but I'd like to be able to fix this without going to my parents.
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Those are my partitions. /dev/sda3 is my Windows Partition, which I want to boot from. Only problem is, I'm not really sure where the computer is looking to find the boot record. I think it's from my fubarred /dev/sda4 partition which means it's basically looking nowhere. So I can't modify it to point to my Windows so I can just get back there.
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Jun 17, 2011
I had 250gb hard disk with dual boot, xp and ubuntu 10.10.Yesterday, i tried to upgarde my ubuntu 10 to 11 from a live cd....b4 doing so, i used a win software EasyBCD to fix the mbr but it didn't work properly..and i ignored it(my biggest mistake)and deleted the ubuntu partion from the windows device manager. It just displays "Booting from Live CD" for few minutes and again displyas the same above error.What should i do now?Its ok if i m not able to recover my data back...i hv sycnd my docs on the internet.
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