Ubuntu :: Grub2 Won't Load Windows?
May 16, 2011
i installed ubuntu / under /dev/sda1, then installed Win7 under /dev/sda2, as primary. Extended partition and its logicals are for data.
After Win7 installation, i can restore the grub2 for ubuntu, with grub-install and update-grub2. It can even probe the NTFS partition under /dev/sda2. But at restart, when i tried to go to Win7 selection, it does nothing, screen goes black, blank, with a single cursor blinking.
Some data:
Ubuntu Natty 11.04
From /etc/grub/grub.cfg:
Code:
menuentry "Windows 7 (loader) (on /dev/sda2)" --class windows --class os {
insmod part_msdos
insmod ntfs
set root='(/dev/sda,msdos2)'
[Code].....
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Mar 7, 2010
i initilally installed ubuntu 9.10 then installed windows 7 ,then i recovered grub2 using livecd as told in the post [URL] i did "sudo update-grub" and got windows 7 menu entry but when i select that entry windows 7 does not load but the grub2 is reloaded again.
i cant boot to windows 7.
Windows 7 have 100 mb partition "System Reserved" the grub2 points to that partition but still windows 7 not loaded.
sudo fdisk -l
Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Disk identifier: 0x3c3a81f5
[Code]....
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Jan 24, 2011
I want to load grub2 from grub4dos.I want to load directly the grub2 core. I know how to load first 512 bytes from some patition by chainloader and load grub2, but what I need is to load directly grub2 core without passing by bootstriping code (first 512 bytes).So, my first boot manager is grub4dos, then I can load grub2 and later I load Ubuntu. But I think I have to edit --set-root
What I dont know is how.
In hdd 0,7 (sda8) I have Ubuntu 10.10 and /boot/grub/core.img is in sda8 (hd0.7)
I tried this way:
Code:
title grub2
find --set-root /boot/grub/core.img
kernel /boot/grub/core.img
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May 17, 2010
I went through so many post but I haven't found the proper answer yet hope you have an Idea1. Grub2 saves only Linux OS as last selected no Windows OS2.It is possible to boot into a cdrom (drive)?
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May 2, 2010
So I recently tried to install Ubuntu Lucid in the following configuration code...
The installation procedure went fine, and it said it had successfully installed GRUB2. But then, when I tried to boot up the fresh system, GRUB2 didn't even load!!
It's not giving me any GRUB errors, or giving me a 'grub recovery>' prompt, so I suspect that it really isn't even booting into GRUB.
I tried booting into the LiveCD, and installing grub to BOTH /dev/sda and /dev/sdb, but it still does not work, and I am at a loss.
Has anybody else had this problem?
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Nov 28, 2010
i have just finish compiling a new kernel from source and would like to know how to load it in to grub2 i know grub the older version was easy to setup with the new kernels but i am not really in to grub2 to know how to load a new kernel to it.
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Dec 23, 2010
I have old laptop without CD (already it's dead), FDD was not from the beginning. This laptop have USB but can't load from USB. I install grub2 but it's work not correct. It boot system only 1 per 3 times. Don't show text correctly - sometimes I saw black squears & not letters (only in this f*g grub2; why developers don't made normal uninstaller?).
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Mar 25, 2010
On Grub legacy i used a menu entry to boot from a DVD since the bios on my pc doesn't recognize my DVD burner.... So before on the old grub i can just added this menu entry and it all worked...title DVDroot(hd0,0)kernel /boot/grub/memdisk.bininitrdboot/grub/sbootmgr.dskthen grub 2 came along and that all changed..on the 40_custom file i added this
menuentry "Boot DVD Drive" {
set root=(hd0,0)
linux /boot/grub/memdisk.bin
[code]....
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Aug 31, 2010
I am a long time ubuntu user (4.10) and have had a fair bit of experience installing ubuntu and the many mishaps along the way.
So after having no internet for a year I decide to try the new 10.04 flavour by ordering the cd from the site.
Installation went well, no hiccups. But when I restarted the comp it went straight to Xp, so I thought I'll just use the SGD to boot the partion anyway and fix this small problem later.
After SGD confused sda with sdb, I figured out that GRUB2 is now the standard boot loader.
So thats where I am lost, I have searched the forums quickly (25 pages or so..) and realise that I am not going to fix this easily or by trial and error.
here's some info
Ubuntu 10.04 LTS
WinXP SP3
Intel P4 3.0
1.5 GB RAM
[Code]....
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Sep 20, 2010
I have a number of legacy pcs upon which I would like to install Lubuntu. None have CDROM drives, but they do have floppy drives. None can natively boot from USB devices. My goal is to boot into Grub2 from a floppy with USB support, but I'm having trouble making the floppy. I've seen recommended a few times a command string something like
Code:
grub-mkrescue --overlay=/boot/grub --image-type=floppy GRUB2.img
dd if=GRUB2.img of=/dev/fd0
But when I go to do this, grub-mkrescue has no --overlay nor --image-type option. My man grub-mkrescue page only lists --modules and --output as options. I have managed to make a floppy using the commands
Code:
grub-mkrescue --output=FILE
dd if=FILE of=/dev/fd0
This disk does boot into Grub2. The problem with this is that I need to add other files to the disk to have USB functionality in Grub2, but this process writes to the floppy in iso9660 format, which mounts as read-only. I have tried to go this route using the mount -o remount option to try to make the fs rewritable, but I also haven't been successful with that (and I think my limited knowledge is restricting me here).
Maybe I can add the correct files to the file output by grub-mkrescue --output before I write it to the floppy, but I also don't know how to do that.
Basically, I'm a little burned out and looking for some direction. Am I going about this wrong? When I try and follow other people's guides, they seem to have options available to them that I don't have. I'm doing all this from my Lubuntu 10.04 live CD, but have found similar things on my regular Ubuntu 10.04 install as well.
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Feb 7, 2010
I' ve tried to do a iso multiboot 1gb pen stick with grub2 bootloader. I 've already readed all is it possible finding on the WWW but there are some problems i don't understand how to solve.
This is my sitution:
-koala 32bit installed on my pc with grub2 bootloader
-1gb pendrive parted as follow:
In the first fat16 partition there is installed grub2. On the second ext2 one there are iso files.
This is what i've do to install grub2 on my pen:
So i've created /boot/grub/grub.cfg file with the follow lines:
When i reboot by the pen stick, grub load up to it says me:
It seems not reding /boot/grub/grub.cfg
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Mar 7, 2010
I've been using Ubuntu since 7.10 Gutsy Gibbon. I only recently fully switched to Linux OS's, and Ubuntu is now my primary. I currently have 9.10 installed. CURRENTLY I also have Backtrack 4, and Fedora 12 (Ugh!).Previously, I thought something was wrong with my my filesystem in Ubuntu 9.10, and after an upgrade of the linux kernel, I started to get Error: You need to load the Kernel First. That's where my problems started. I had upgraded to 9.10 from 9.04 and I still had Grub Legacy, so I went through hoops to try and get it to work, but eventually everything just kind of broke, and I completely wiped off my partitions on it and started fresh installs of all 3.
And now that the new linux kernel is released, 2.6.31-20 generic (I think... That's what the highest number on a file I can find in /boot is)I went through a few more hoops and ladders and tried to get it to work, but to no avail. I've looked the internet for a solution to this and tried just about everything but there is no unified answer, and I've seen on Launchpad there are alot of bugs that are classified as 'Fixed', but the problem still remains.I took out the 'quiet splash' part in the GRUB2 line for the newest kernel and it didn't do anything. It only changed it to "Error: Couldn't find file".This is the top two kernels (Main and Recovery for the new, and Main and Recovery for the previous working one)
Quote:
### BEGIN /etc/grub.d/10_linux ###
menuentry "Ubuntu, Linux 2.6.31-20-generic" {
recordfail=1
[code].....
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Jun 8, 2010
So I have an MBR that is Grub legacy,(from HardyHeron) and I cannot edit/upgrade this MBR. (I won't get into the reasons, other than I will mention SafeBoot).
I have a new encrypted LucidLynx Linux installation on partition 4 and an unencrypted /boot partition on partition #3.
When I boot up, I get the "Error 15" Grub error, which is expected as Grub legacy is looking for /boot/grub/stage2 or something like that and /boot/grub/stage2 does not exist in my GRUB2 installation in /boot/grub.
I thought if I could make a link from the GRUB2 binary of interest to /boot/grub/stage2, then maybe the GRUB legacy would be tricked into loading the GRUB2 binary.
what is the binary of interest in the GRUB2 installation that is the main binary?
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Dec 24, 2010
Very strange Grub2 issue on my Dell Mini 10.
Had Crunchbang Statler on it, and after an update, it would hang at grub, before the grub prompt. ("loading Grub, Welcome to Grub" then blinking cursor, but no prompt or ability to get into rescue)
So I booted into a liveCD, chrooted in, and reinstalled Grub2, purging everything. No dice. Same problem.
So I figured the device maps weren't right, so I pulled off any important files via the live stick, and reinstalled #!. Same problem.
Did a bit of googling, and it seemed like it was most probably not a true Grub2 error, but a bios problem, so I reinstalled XP, flashed to a new bios (A11).
Then reinstalled, this time with Zenwalk (figured it might be a debian thing). Same thing. (note I replaced lilo with Grub2 for puroposes of testing)
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May 19, 2011
I've got a Lucid system (normal Ubuntu, not any of the derivative distros) which has been throwing up the following error message this morning when trying to boot:
Code:
error: couldn't read file.
error: you need to load the kernel first.
[code]....
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Aug 5, 2011
I'm attempting to triple boot Windows 7, Mac OS X, and Ubuntu 11.04 on non-Mac hardware. Chameleon is my primary bootloader, which is supposed to chainboot into grub2, but all I get when I choose the Linux boot option is a black screen with blinking cursor. If I try to boot Ubuntu while holding shift, I get the word GRUB, followed by a space and a blinking cursor. grub2 is installed to the Ubuntu partition, and attempts to reinstall it there or to the MBR from a LiveCD result in errors. The MBR and GPT partition tables are synchronized. How do I go about making Ubuntu bootable, without breaking my other two operating systems (or at least leaving them recoverable)?
I built a new desktop computer.The goal was to triple boot the system with Windows 7, Mac OS X Snow Leopard, and Ubuntu 11.04. This endeavor has been significantly more complicated than I originally expected, but with the of a forum-goer at InsanelyMac.com, I've managed to get pretty far with a complex installation process. I've attempted to get Ubuntu running using two methods, neither of them achieving what I'm hoping. Both methods follow.
In the first method, I install Mac OS X using a specially designed install CD that boots into the Snow Leopard installation DVD. The disk is partitioned to have a FAT partition, followed by a Mac OS X journaled partition, ending in a second FAT partition. Mac OS is then installed to the second partition. The Windows boot CD is then used to format the first FAT partition as NTFS, which Windows 7 is then installed to.
As I'm sure you know, this installs Windows Boot Manager. Then I boot into OS X using the boot CD mentioned earlier, and install Chameleon, a bootloader specifically designed for Hackintosh systems, and (supposedly) capable of booting into all three operating systems I'm trying to work with. Finally, I divide and reformat the remaining FAT partition into an ext4 partition and a swap partition, and install Ubuntu to that ext4 partition, with the bootloader installed to the same partition. This will break the Windows bootloader, as now the MBR and GPT tables are no longer syncronized. Ubuntu is also unbootable; attempting to chainload into grub2 leaves me at a black screen with a blinking cursor. The former problem is solved by booting into a LiveCD and installing and running gptsync. Windows is now bootable, but Ubuntu remains in 'limbo'.
The second method I attempted is very similar, but deviates in the last few steps. After installing Windows, I instead install Ubuntu 10.04 LTS, as I thought I might have fewer bootloader issues with that distribution (don't ask why; it was a lucky hunch).This breaks Windows Boot Manager, but this time grub2 throws me into the grub> prompt.I can boot into Ubuntu just fine using the set root/linux/initrd/boot commands, but my motherboard's Ethernet port is not detected by the OS, so I can't directly download and run gptsync. Once I do manage to run it, though, Windows is then also repaired.
Unfortunately, since I can't access the Internet, I can't do a distribution upgrade that way. Trying to upgrade from the recent release's LiveCD...well...doesn't upgrade, just overwrites. So I get the same black screen with blinking cursor problem. I've tried reinstalling grub2 through a LiveCD using grub-install both using the --root-directory flag and the chroot method.
System specifications:
Intel Core i7 (LGA1155)
Corsair VENGEANCE 4x4GB DDR3
[code]...
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Jan 5, 2010
I'm running Ubuntu 9.10 and Windows XP on my system. After installing Ubuntu, it boots normally about once, and then the next time I try to boot, I have to wait a few minutes with it saying "GRUB Loading." I have read other threads about this that say that it is clearly a GRUB2 problem, and something about Windows overwriting something with the MBR; although I haven't booted into windows once in the process of installing Ubuntu (multiple times) or afterward. GRUB version 1.97~beta4.
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Oct 1, 2010
I have two hard disks sda and sdb. I have Windows XP installed on sda2 and Ubuntu 10.04 on sdb5. When I installed Windows XP, Ubuntu stopped booting. I tried to repair grub2 from a Live CD unsuccessfully. Now I have completely messed up my MBR of both HDDs. I just want to configure grub2 to load both OSes in dual boot mode.
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Mar 14, 2011
I just installed CrunchBang Linux and it's great! But I can't boot into windows anymore. I'm sure it didn't delete my Windows partition-it's mounted. My linux partition is /dev/sda1 Windows is /dev/sda2
Code:
sudo update-grub
Found linux image: ....
Found initrd image: ....
Found linux image: ....
Found initrd image: ....
done
how I can get Windows to reappear? I've had bad luck with Grub in the past and I don't want to fight it on my own...
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Mar 21, 2011
i have just installed Ubuntu 10.10 on a pre installed windows 7 system. Ubuntu is working really well but the only problem is that when I try to boot into windows,
I get the windows sign and then I get a black screen and windows does not load. It seems to be an easy problem to solve because I can actually boot windows 7 in
safe mode with no problems at all! The problem is there when I try to boot windows 7 normally. To be honest I only need windows for a project that uses MSQL server.
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Jan 17, 2010
As the Title states, "update-grub" does not detect the windows xp partition on /media/sda1. And, when I attempt to mount it from teminal nothing happens, and from nautilus I receive the following error: "Error mounting: mount exited with exit code 2:
mount: only root can mount /dev/sda1 on /media/sda1" I am root.
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Aug 26, 2010
I booted into Windows 7 three times this summer and each time I did, upon restart grub was missing. In fact, the computer couldn't find any operating system, and displayed an error "No Module Name Found".
how to make windoze not commit suicide and delete grub?
I have a Dell Studio 1557.
:~$ uname -a
Linux dell-monsters 2.6.32-24-generic #41-Ubuntu SMP Thu Aug 19 01:38:40 UTC 2010 x86_64 GNU/Linux
:~$ sudo fdisk -l
[Code].....
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Oct 10, 2010
I've searched quite a bit and cannot find a solution to why using update-grub cannot detect my windows 7 partition Here is a log of the bootinfo script(hopefully it pastes correctly...)
Code:
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 #1 for (,msdos1)/boot/grub.
[code].....
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Oct 27, 2010
I upgraded a while back to Windows 7. I run two separate HDDs, with debian on sda and windows on sdb.Everything worked fine, up until i upgraded to windows 7. The installer forced me to unplug sda and make sdb primary. After installing I repositioned the HDDs and was stuck with a "NTLDR is Missing" messageAfter removing the search -fs--uuid tag from grub.cfg, Windows 7 booted for a good 0.5 sec and then rebooted. All that flashed was the "Starting Windows" page. I see similar bugs reported in the launchpad, but nothing that directly parallels this Here's my windows entry in grub.cfg:
Code:
menuentry "Microsoft Windows 7 Ultimate (on /dev/sdb1)" {
insmod ntfs
[code]....
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Nov 18, 2010
I've installed Xubuntu 10.10 on a very new EeePC 1201HA. The netbook came preconfigured from the OEM with the disk split into two Windows partitions of about the same size, one with Windows 7 starter. I removed the second partition (Which was just empty) and have installed a series of different distros since then, to try and gauge their support for the 1201HA hardware. I finally settled on Xubuntu, which can support most of the laptop's features with some tweaks.
However, after this last install, and a Grub config change needed to make the framebuffer work on this hardware, I'm unable to boot Windows 7.Grub shows it on the menu normally, but when I select the Windows 7 entry, I get the message 'Reboot and select proper Boot device or Insert Boot Media in selected Boot device and press a key,' which I understand isn't from the OS but rather a BIOS message which implies there is no loader.
I've tried using the Windows 7 system restore to do everything short of rewriting the Windows bootloader to the MBR (Which would, of course, remove Grub and thus not solve my problem, as I couldn't load Ubuntu from it). I attempted to fix the boot sector on the partition with the system restore tools, to no avail. And because this is a netbook with no optical drive, I'm unable to reinstall from a disk.
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Dec 5, 2010
So to make things short, here's my situation: I was having the "no module found" problem, because dell software kept on messing with the MBR So I restored the MBR using Windows recovery and deleted the dell software Re-installed ubuntu 10.10 off the liveCD ~Then I had problems getting GRUB2 boot menu to show at boot, but i fixed that~ Now I'm having the problem where whenever I try to boot into windows 7 through GRUB2 instead of booting windows I just get:
"bootmgr is missing"
Note: I can still boot into Ubunutu 10.10 just fine.
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Feb 17, 2011
I installed Ubuntu 10.10 on my computer from a USB. I did not use wubi to install ubuntu. The computer already had Windows 7 installed. According to gparted, Windows 7 is installed in sda1, linux swap space is in sda2. Then sda3 is shown as a drop down menu containing sda5, where linux is installed. A picture to show this is attached . sda4 is a recovery partition that came with the computer.
The problem is that Windows 7 sometimes boots, and sometimes it does not boot. Most of the times it does not. Ubuntu boots perfectly. The process to boot is the usual, turning on the computer, wait for grub to load. If I pick Windows, it goes to the splash screen (which is by the way not the usual windows 7 splash screen, it resembles more the vista splash screen, picture attached. I do not know the reason, and I have no idea if it has anything to do with the problem) About 80% of the time, it simply reboots a few seconds after the windows splash screen is shown. The reboot takes me back to the usual HP splash screen, then grub again. The other 20% of the time, it boots normally and works perfectly well.
Right after I installed ubuntu Windows was shown in grub as installed at sdb1. I updated grub and now it is shown as sda1. I already tried some grub custom entries for loading Windows differently, but they all present the same problem. Please do not discard a custom entry as a solution, as the source I used for these custom entries was not entirely trustable.
I also tried popping in the windows installation disk and trying a system repair, but apparently no errors were found.
Reinstalling grub using Ubuntu live cd (booted from a USB) did not work either...
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Oct 5, 2010
I am having problems booting a new Ubuntu 10 (server) install. My primary HD (/dev/sda) is laid out as follows:
Device Boot Start End Blocks Id System
/dev/sda1 * 1 18 144553+ 83 Linux <-- /BOOT
/dev/sda2 19 182401 1464991447+ 5 Extended
[code]....
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Jan 4, 2011
I am trying to figure out how to load the generic kernel in Grub2.
I have run the /usr/hare/mkinitrd/mkinitrd_command_generator.sh and ran the output:
Code:
Why this will not load.
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Feb 28, 2010
I have 2 hard drives, first drive (hd0) is for data, second drive (hd1) is for the OS's. Windows 7 was installed on (hd1) a few months ago and wiped out GRUB. But today, I decided to go back to Ubuntu. I performed a fresh install of 9.10 x64 to (hd2), GRUB2 works and finds Ubuntu (both the newly installed x64, and the previous x86 versions), but it does not see Windows 7. The only goal I have right now, is to make Windows 7 bootable, once again.
My "sudo fdisk -l" (typing manually, so skipping the Blocks)
Device Boot Id System
/dev/sdb1 83 Linux -- where x64 9.10 is
/dev/sdb2 f W95 Ext'd (LBA)
/dev/sdb5 83 Linux -- where x86 9.04 is
/dev/sdb6 83 Linux -- /home
/dev/sdb7 82 Linux Swap / Solaris
/dev/sdb8 87 HPFS/NTFS -- Windows 7
Things I've tried so far:
1) Automatically finding Windows: sudo update-grub2
2) Reinstalling grub via Live CD (9.10): sudo grub-install --root-directory=/media/(where sdb1 - x64 Ubuntu is) /dev/sdb
3) Forgetting Ubuntu altogether and fixing boot using Windows 7 - bootrec.exe /fixmbr; bootrec.exe /rebuildbcd
Now, number 3 is interesting, I found out that where Windows is installed, /dev/sdb8, is a logical partition, and cannot be made active (bootable). This led me to try number 4:
4) Updating /etc/grub.d with custom 40_Win7 file, and making it bootable (the GRUB makeactive, GRUB2 parttool command):
echo "Adding Win 7 to Bootloader" >&2
cat << EOF
menuentry "Windows 7" {
insmod ntfs
set root=(hd1,8 )
parttool (hd1,8 ) boot+
chainloader +1
} EOF
When I update grub.cfg after trying #4, it gives me the "not a primary partition" error. So now I am confused. Windows 7 was able to boot previously from this very partition, and I don't think installing 9.10 would change a partition type from primary to logical. So, why can't it boot? More importantly, what can I do to boot Windows 7?
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