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?
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.
Installed 10.04 on my daughters laptop from within windows Vista. All went OK but I had two boot loaders, i.e. turn on laptop and I would get the Windows loader asking if I want to boot in to windows or Ubuntu. Upon selecting ubuntu I would get the standard grub loader that I have on my PC. Did an update a few mins ago and it asked me to update grub which I did and as there was only one disk showing clicked forward. Now on reboot I have grub rescue prompt, no such device. Hard drive is a single 80 gig drive with windows on one partition and ubuntu in another. Have the live cd so can boot from that I guess. What do I do next?
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.
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.
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
I recently removed Winblows Vista from my laptop and replaced it with Kubuntu 10.10 (I left the recovery partition on there, just in case). When I turn on the computer, the GRUB menu appears, I press enter, then a little flashing underscore appears on the screen in the top left hand corner. After a few seconds, the Kubuntu logo appears and I can log in.But yesterday I replace Kubuntu with Ubuntu 10.10. The Boot process is the same, but the little flashing underscore in the top left hand corner flashes for about 10 seconds longer then Kubuntu 10.10 did, and then a few paragraphs of text appears for a few seconds, then I am logged in automatically.Is this "unusual" boot process anything to worry about, or am I just being a noob.
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.
I have an old BIOS (only 149 GB detected in 160 GB drive). I have installed very few OS as a result - Windows in first 80 GB , 2 distros (20 GB each) in next 40 MB which is within the 149 GB. On issue of "update-grub" grub seems to detect all OS and generates grub.cfg. But on boot , one distro does not appear in the menu.
I was unaware of the difficulties of installing and booting Ubuntu from the "onboard raid" that the NVIDIA nForce chipsets provide. However, I've managed to get it working reliably with one single caveat:
When update-grub builds the grub.cfg, it refers to all of my partitions as follows:
Code: menuentry 'Ubuntu, with Linux 2.6.35-27-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail insmod part_msdos insmod ext2 set root='(/dev/mapper/nvidia_caifaefg,msdos5)'
[Code]...
So I'm guessing that the whole nvidia_blah,msdos5 is because of that. However, it doesn't seem to explain why Grub would THINK that would work and it in fact does not work. That's the biggest source of confusion on my part.
My questions are as follows: First off, because as an IT person I want to know: Why does this sort of change work? What does changing that device name change in GRUB's behavior? Is there a setting in /etc/default/grub that would change the way it's naming these RAID devices? Is there a value for this setting that would give me the device names that work, as explained above?
If there is no setting change I can make in /etc/default/grub, could I add a sed command on to the end of update-grub or can I make a modification to one of the scripts in /etc/grub.d? What sort of change would be recommended? How would I preserve this change through later package upgrades that would possibly rewrite these files?
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.
I've been trying change the default OS in GRUB. I changed the value for GRUB_DEFAULT in etc/default/grub. However, when I run update-grub, I get the following error:
and I rebooted and grub menu not coming now. I have a dual boot with Win7. Ubuntu 10.04 is installed with WUBI. I can run WIN7 but can't run Ubuntu now.
I'm having an issue where, after having just installed Xubuntu, the GRUB menu fails to appear when the USB stick I used to install it is not plugged in. Without it, pressing ESC brings me to the Windows 7 (OS dual-booting with) special menu.Is this standard behavior?Is the default timeout zero? Can I adjust GRUB to display for a long enough time to make a decision?
opened the system>administration>bootloader guior anything just opened it)now on boot I get a timeout with an option to go to the grub configuration or boot my one and only installed versionwould really like to get rid of that and go back to booting straight to my only fedora version installed without the option to go to grub (might be useful someday, but now is not the day
i installed Rhel5 as dual boot with windows.after installation it worked nicely.i forgot to eject the installation dvd of rhel5 from the cdrom.while rebooting the installation menu appeared. so rebooted and eject the dvd.The problem is the GRUB loader not showing the boot menu(windows or Redhat).it shows grub>what sould i have to do, to boot
I just booted into Linux and the Update Manager prompted me to restart. After the restart the GRUB interface I expect to see is no longer there and now it is just a command line that says press tab for more options.I have not got a clue with shell language as I have had no time to learn it as of yet. Do I need to uninstall and reinstall Linux or is there a command that can be typed that boots up the operating system.Even better is there something I can do that can return me to seeing the interface like I was used to.
I am currently running 9.10 ubuntu (gnome). I have a dual core intel chip at 3.00 ghz. My mobo is an ASUS P5ND2-SLI. My mobo will support up to 8gb of ram. Now, as we all know, 32-bit os/kernel will only support like 3.2gb, and 64-bit like 4gb. I'd like to install a pae kernel so I can get the most from my mobo, but honestly, I don't have a clue where to start looking for a pae kernel. I'd like to be able to select it from the list that already appears after the grub loads, and if I like it, be able to remove the rest from the list, or just make it default.
Question, in CPU-G, it says my architecture is i686. I don't know if that's the os/distro, or the kernel itself. it also lists the GCC version as 4.4.1 and Xorg as 1.6.4. my current kernel is Linux 2.6.31-22-generic. Again, I'm trying to find a pae kernel, but I don't know if my os/distro will make a difference, if the architecture is the kernel or os itself. I am still fairly new to ubuntu, and I must say, I've made the switch completely from windows.. which blows...
My dell machine has the following: A raid 0 SAS config with Windows 7 installed in one partition, and ubuntu in the other partition. Then two seperate sata hdd. The raid drive is set as first boot, and Windows views it as disk 0 and boots just fine. When I installed ubuntu 10.04 on the second partition, it viewed the disk as sdc. And when booting off the raid drive,im not given a grub menu to choose ubuntu orwin 7,windows 7 boots all on its own.
i have ubuntu 10.04 and xp installed in two different hard disc partitions. everything was fine until i came from vacation and found that after turning on my pc it gets hang as soon as the grub menu with duel boot option appears. i cant do anything at that stage, just nothing.keyboard doesn't work also. here one thing to be mentioned that for last few days my pc used to hang frequently in ubuntu 10.04 and then i had no option left but to restart my pc.
Last night I rebooted my desktop and it failed as in it just kept resetting after the bios post...so I changed my boot drive which gave me a "no bootable drive found" error(this confirms hdd fault) thee I booted a live cd and checked my partitions
They are as follows sda1 - boot(ntfs) sda2 - windows(ntfs) sda3 - swap sda4 - ubuntu(ext4)
I tried to mount sda4 to reinstall grub but it failed...says the partition is corrupt sda2 has no problems and I made a backup for it now the problem is how do I perform a disk check on sda4 and how do I get my system up and running again? I dont want to reinstall!
I would like to know if there is any differences on how to install and to configure GRUB 2 in the different architectures (BIOS/IBM PC-Compatibles, EFI/MacIntel and Corebbot)? Does the Ubuntu installer automatically recognize the different architectures and install the appropriate GRUB 2 package ('grub-pc', 'grub-efi' or 'grub-coreboot' according to the arch)? Or does it just install 'grub-pc'? Is the location of GRUB 2's configuration files different depending on the arch of the computer? Or are they all located in '/boot/grub/', '/etc/grub/default' and '/etc/grub.d/', no matter the arch of the computer? Are the files' structure and options to configure GRUB 2 ('/etc/grub/default' and the scripts in '/etc/grub.d/') different depending on the arch of the computer?
I have been trying ubantu 9.10 via dual boot (with windows XP) for a while now. Today I decided to wipe out windows and install ubantu only. After I completed the install I get GRUB prompt and I cannot type anything. So I booted from CD again and opened ubantu from disk. ran the boot_info_script as mentioned on other posts here and here is the results
Boot Info Script 0.55 dated February 15th, 2010 ============================= Boot Info Summary: ============================== => Grub 2 is installed in the MBR of /dev/sda and looks at sector 2928391 of
I use wubi 10.04 installed on my xp drive. the other day my pc froze while surfing the internet. I used the following key combination to reboot my pc (this is the first time I'm trying it), but when I selected ubuntu, I don't get the grub boot menu, on the other hand, I get a little welcome message to the grub prompt and "grub>"How do I fix this and boot into Ubuntu?
Just got done installing U 10.1 into my old Dell desktop. Since I'm pretty darn new at Linux, I'll do my best to explain. Upon selecting Ubuntu to boot, I get a 'grub>' prompt, much like C: in DOS. But, at this point, I haven't the slightest idea of what to do.
