Ubuntu :: Grub And MBR Messed Up After Windows Update
Jul 14, 2011
I just started using Ubuntu 10.04 for development reasons and installed Ubuntu on a seperate harddrive with dualboot option with Windows 7.Today Win 7 got an update and I mysteriously got bumped back to the grub screen after selecting Windows boot option, but my Ubuntu was ok. After that I probably did the worst I could, and googled the problem and tried out some years-old advices which messed up my ubuntu boot as well.I am currently using my computer through Ubuntu Live Usb.
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Jul 19, 2010
I did a system update and it did something to the grub loader and now all I can select is my windows partition. I'm not really sure how to go about restoring my grub loader. I had ubuntu 10.04.
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Mar 10, 2011
This seems to be a variant of a problem many people have had, but after several hours trawling through various forums, I haven't seen a reliable match for my situation.In brief:Adding a third boot partition (of Ubuntu) to my existing dual boot of OSX 10.6 and Windows 7 seems to have crippled the Windows boot from working, because Grub apparently takes over the process. Yet Grub does *not* appear to be on the Windows partition.
More verbose:I have an older MacBook Pro (3.1, running Snow Leopard) that I recently refitted with a new 240GB SSD HD. With the extra space (it was previously only 120GB) I decided to add a dual boot with Windows 7 using bootcamp. This all went swimmingly well.Encouraged, I decided to follow this Lifehacker article's suggestion and triple-boot the machine with Ubuntu (I'd never used Linux before):So I now have the nice rEFIt boot partition selection screen, and, indeed, I'm up and running in Ubuntu, and enjoying it.
Only one problem: I can't get into Windows any more. If I try to go in through rEFIt *or* by holding down OPT at startup and selecting the windows partition directly, the result is the same: I get thrown into Grub's selector, and selecting the Windows partition from there leads to an error message and a dead end.Having read through numerous postings, I get the impression that Grub is doing something or living somewhere that it ought not to be, but in most cases I've seen, people had accidentally installed Grub onto the Windows partition (or indeed onto EVERY partition). So far as I can tell, this isn't the case with me. Here's my boot summary:
Code:
Boot Info Script 0.55 dated February 15th, 2010
============================= Boot Info Summary: ==============================
[code]....
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Jan 31, 2010
I've trawled the internet but can't seem to find the exact same issue, so I've made a new thread. So, I installed Ubuntu onto a 160gb drive. I have other drives in the system, but I disconnected them so that the system drive would be sda. Ubuntu installed perfectly with no issues whatsoever. I connected the other drives in the system, and again it booted up perfectly (although I can't remember whether the 160gb drive remained as sda or became sdd). Then I attached some extra drives temporarily to do some data shuffling.
This moved my system drive to become sdf. My computer booted fine multiple times like this, but when I was finished with the drives I rebooted and suddenly everything broke. For some reason my ubuntu installation showed up in the GRUB twice, and neither of them booted. So, I popped in the Live CD (which I'm using to type this post), and decided to update the grub. I chrooted into my system drive and ran update-grub, but it simply returned something like this:
[Code]....
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Apr 7, 2010
after doing an upgrade to 10.4 and updating grub I get this message. how do I address this
[Code]...
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Jan 20, 2011
I've tried the instructions here[URL].. But I couldn't get that to work.Anyone know what I can do?
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Jan 12, 2010
I'm running a dual boot Vista/Ubuntu Jaunty. I made some changes to the grab menu so that my windows OS would appear at the top of the list .I know I could have changed the default so that Vista would have been highlighted instead of Jaunty. But the reason I moved it to the top is because when I do a kernel update, I would still want Vista to be the default booting OS. Anyways, after the update my Vista OS disappeared from grub. It didn't get deleted because the Vista partition is still accessible from Jaunty. Can anyone help me boot into Vista and preferably make it the default OS even after a Kernel update? I attached part of my menu.lst .
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Apr 15, 2010
I need to add my windows installations to the grub menu.I have windows 7 and windows xp on hd0 and windows xp on hd1.Using 'sudo update-grub' doesn't seem to help.So how do i fix this?
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Jul 21, 2010
I have been phenomenally unlucky with Ubuntu as seen my my post history and decided to dual boot.
I set it all up with a clean install, when I tried to load Windows from Grub the computer restarted. After much headache I managed to set it up correctly (when it wouldn't load from Grub I booted from the Windows CD and clicked on "Repair computer" and it finally worked).
Now I am having the same problem as before--I think my installed all the updates from Update Manager and it included a grub one. Now I can't load Windows from the grub menu: It goes to the Starting Windows screen and then reboots my computer. If I do it again it gives me an error message and an option to perform "Startup repair". When I try to do Startup Repair, the computer reboots after a few loading screens.
So I tried what worked before and put in my Windows 7 CD, and clicked on Repair Computer. BUT NOW it gives me an error message somewhere along the lines of system restore is not compatible with my installation of Windows, and to insert a compatible recovery CD. This is the ONLY Windows CD I have (legitimate copy).
Over the course of this migration experiment I have installed and reinstalled both operating systems 7-10 times total. I'd rather not do it again. My poor laptop is probably wondering what the heck.
I can't stick with Ubuntu alone because my wireless doesn't work with it, my grad school files are not completely compatible with open source software, and I can't play the games I'd like to. So I must have the option to at least dual boot into Windows.
When selecting Windows it restarts the computer entirely to the Compaq screen, not just to the Grub menu, if that matters.
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Jun 7, 2010
I'm not sure why this is so difficult. I decided to upgrade to 10.04 from 9.04 after an update messed up my graphics and I had to get some work done rather then sift threw a mound of sparsely detailed possibilities. Also I'm not an leet coder.
So really I've installed 10.04 on many machine's with many different video card's and many different monitors. But to some magnificently obscure reason I'm unable to set the correct resolution on any single computer. Ati, Nvidia. Not intel on second though.
I've managed to scrounge up some tidbits of info on the new KMS (kernel-mode-setting) technology. I've run threw a few suggestions threw out the forums and across the net. I've tried al sorts of drivers. I've tried removing the xorg.conf but I've seen little info on why that is other then it is not needed. I've added things to /etc/default/grub, I've removed things. I've gone threw synaptic and removed everything Nvidia and reinstalled it. This by the way is always off a fresh install every time.
So here it is. I'm at the end of my rope. I know this must be some new way of doing things but It just seems odd that every computer I've tried has failed me. I need the correct resolution to work. I can't keep burning the eye's out of my head looking for possible solutions on crappy resolutions.
I'm sorry for the rant. I'm frustrated and seriously considering switching to Redhat despite having to pay for there service's. Could anyone shed some light on my gloomy situation. I want to keep promoting Ubuntu with out saying "if you can get such and such working"
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Oct 30, 2010
i wanted to fix splash screen, to be in 1680x1050 resulution, so i've found this: [URL].... After restart i don't have Ubuntu, with Linux 2.6.35-22-generic, just Ubuntu, with Linux 2.6.35-22-generic (recovery mode) My grub.cfg
[code]....
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Mar 7, 2011
So, I had Win7 and Ubuntu 10.10 in dualboot and after upgrading to 11.04 I managed to screw up GRUB, it didnt boot into Win7 anymore. After that I got rid of both ubuntu and swap partitions and merged them to Win7 partition via Gparted and made a clean installation of 10.10 again next to existing Win7 hoping to fix GRUB and be able to boot into Win7, but now when I try to boot into Win7, I only see '_' blinking on top left and nothing happens, Ubuntu works fine.
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Jan 25, 2010
I have a vista/ubuntu 9.10 duel boot laptop. Last week the screen was broken so it went back to the manufacture. Before that I rename the /etc/grub.d/10_linux file and ran grub-update so that Grub will only show windows boot menu (in case it confuses the repairman) now I have the laptop back and I am eating my own medicine.how to restore my ubuntu boot menus? I can now only boot into windows, although it seems like I can go to my ubuntu partition and change back my grub.cfg (which I did not backup!)but I can't remember the menuentry details.Is there any way, other than manually change my grub.cfg, so that I can boot into ubuntu again?
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Jun 20, 2010
After doing my weekly update, I discovered that I am not able to access Windows.
My windows entry still shows in my grub list on the boot menu The windows partition is still there
However, when I select windows as the os from the boot menu, i get a black screen with a white cursor in the top left corner.
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Jul 9, 2010
Ubuntu's update manager recently updated the Grub menu.lst file. It let me decide if I wanted to keep my old menu.lst or the new one. After deciding that I was fine with the new one, I found out that I can no longer boot into Windows 7. I had previously edited menu.lst so that Windows would be at the top of the list, however, I didn't notice that this had put it into the automagic update area, and I realize now that I should have just edited what the default number was instead of moving around the entries.
Anyways, I can no longer access my Windows 7 OS via Grub, and I was wondering what sort of fix I can have for this. I've tried running update-grub, but it hasn't fixed the problem. The Windows bootloader is on the first partition of the only hard drive, as far as I can remember.
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Oct 23, 2010
With a bit of help from this forum I managed to install 10.04. The solution was to add i915.modeset=1 to the options when booting up from CD.Now I need to do the same in order to boot up from HD. I've opened /etc/default/grub and changed the relevant line to include the above option. But I need to run "update-grub" and it comes back with an error to the effect that it 'can't find a device for / (is /dev mounted?)Also, the boot menu only has ubuntu - no sign of windows in my intended dual-boot. What can I do?
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Nov 29, 2010
I am running Ubuntu 10.10. Normally when I boot, I get the choice to run Ubuntu or the Windows loader, where I choose between 7 or XP. I have just noticed that when I boot now, I do not have the choice of going into windows. This has happened on two of my PC's just in the last few days. I assume one of the updates has overwritten the grub configuration file as I still get the grub menu but not the windows option. I have tried sudo update-grub but this did not solve the problem.
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Sep 14, 2014
I installed Windows Xp 64bit(in a partition called d:) with dual boot with Debian Wheezy. Installed first Windows Xp and after Debian Wheezy, but grub is not seeing Windows!
Look at my "fdisk -l".
root@robgeek:/home/rob# fdisk -l
Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders, total 156301488 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0xe274e274
[Code] ....
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Dec 3, 2010
The last update of a few days ago messed up the update manager. here is the error that I get. I do not have the time to hunt for bug reports to report this and don't know how anyway. maybe someone else can do it.
Could not initialize the package information An unresolvable problem occurred while initializing the package information. report this bug against the 'update-manager' package and include the following error message:
'E:Encountered a section with no Package: header, Eroblem with MergeList /var/lib/apt/lists/us.archive.ubuntu.com_ubuntu_dists_maverick_main_b inary-i386_Packages, E:The package lists or status file could not be parsed or opened.'
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May 16, 2010
Today I tried to boot up Win 7 but it appeared "BOOTMGR is missing" error. I boot from windows dvd, selected repair but it didn't found my windows install. I have to use rebuildbcd - didn't work, then mark my partition as active - I figured out that it was active and I marked it as inactive and now grub is also broken and I'm using live cd.
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Jul 2, 2010
I have updated from 9.10 to 10.04 on line via Update Manager. Update Manager messed up my sources. Blocked most of them on update. I unblicked them and changed everything to Lucid from Karmic. No luck. Errors all the time:
Code:
W: GPG error: [URL] lucid Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
W: GPG error: [URL] Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
W: GPG error: [URL] Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5
I cannot add gpg keys and use for example canonical.
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Apr 6, 2010
Been trying to solve this using Google for a while. Well, I recently did: sudo apt-get dist-upgrade. Now, whenever I boot up I get "Error #15: File not found."From what I've gathered, something is wrong with my menu.lstI've tried several things to fix this, but I can't figure it out.
Code:
#
# examples
[code]....
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Jun 4, 2011
I installed Fedora on a separate partition and during the install prompts forgot to uncheck the Grub installation. So, Fedora installed with Grub 1 (imagine that) although I was able to find instructions to upgrade it to Grub 2 (plus it recognized all the OS on the computer). So far so good, I don't have a preference whether Fedora's or Ubuntu's Grub is installed, however the Ubuntu Startup Splash screen is messed up, ie. a simple purple background with "Ubuntu" in system fonts. Is there a way to fix this back to the graceful default splash screen? Can I change back the Grub to be Ubuntu's?
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Oct 14, 2010
I have used openSUSE for a long time, but was trying to install Kubuntu 10.10 in addition to opensuse 11.3 and Windows 7 on a Gateway desktop (1500 GB hard disk & an external drive with 1000 GB. From the CD with the isoimage I got the live version and then decided to press install. I chose to follow the suggested choice of partition: About half of the external drive (500 GB) was allocated to Kubuntu while the internal hard drive contained Windows 7 and opensuse.
Everything went well until I was asked to restart the computer. I got a black screen with the message:
error: no such device: 64e3ffcl-c003-482a-87f3-89489e5e067d. grub rescue> At this point the only command that will not respond with Unknown command .. is 'ls' which gives: (hd0) (hd0,msdos9) ... (hd0,msdos1) (hd1) (hd1,msdos2) (hd1,msdos1) (fd0) (fd1)
I am now ***completely lost***. The only step that gets me out of this screen is ctrl-alt-del which causes a reboot and brings me back into the same situation. The ***computer is useless*** until this is resolved.
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May 2, 2010
My last update for Ubuntu 9.10 messed up my whole install. My question is how do I reformat my parttion so I can reinstall Ubuntu. I am using dual boot with Windows and Ubuntu!
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Dec 18, 2009
My computer is a dual boot between windows xp and fedora 12. I am using grub and my first boot selection default was windows. My computer has the following specs:
-AMD athlon xp 2400+ at stock speed 2.0Ghz
-640mb of ram, 2x256mb, 1x128mb, all 266mhz speed
-250gb SATA harddrive, seagate
-Nvidia GeForce 4mx AGP video card
-ASUS A7V600 rev. 1.00 motherboard
I booted up fedora 12 today(12/17/2009) and did a fedora software update (task bar->system->administration->software update). It said it found 94 new updates release on (12/16/09), so click update, and the computer did its updates and reboot. Now my grub boot loader is messed up (boot default was windows, now its not) and random apps crash, like gedit, so I can't edit my grub settings to boot to windows and linux is now useless because apps keep crashing. As of right now I am using another computer to post this. I know one of the updates was a Fedora 12 kernel update. And the new updated fedora 12 "automatic bug reporting tool" does not work any more, after the update.
Some ideas I have, but I have no idea how to do them:
-uninstall last updates
-repairand/or restore bad files
This is important because I need to use some of the apps/programs for work.
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Jan 26, 2010
I have just updated current to get the new kernel and things seem to have gone just a little wrong.After upgrading i edited lilo.conf and ran all seemed fine so i rebooted to find my pc wont boot it cannot find modules and there will be trouble ahead it think it says (will check the error and add it).So i thought no problem i can just boot from an old disk i have laying around and fix it from there. I only had the 12.2 install disk or ubuntu 8.10 live cd neither of witch support ext4 which i stupidly decided to format my drives in.
Anyways i now have a ubuntu 9.10 disk and have booted and try to fix things but am miffed at whats going on. If i chroot into my slack root and look in my /boot there is only the old files before the update, but if i mount the drive in ubuntu there are the new files from after the update.What has happened and how can i fix it? It has just occurred to me i could use a tmp dir and copy the correct /boot files there then in the chroot copy them to /boot may work ?
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Nov 27, 2009
I just did an upgrade from 11.1 to 11.2 and can not boot to OpenSUSE any more. That happened when the first reboot was starting after finishing the upgrade from the DVD. I tried to find the issue and use the repair system with no luck yet. Now I get no gfx for grub
The only thing I managed is to add the windows boot section for windows but I can not seem to boot to opensuse. device.map:
Code:
(hd1)/dev/disk/by-id/ata-ST3160815AS_5RA2LTD0
(hd2)/dev/disk/by-id/ata-ST3160815AS_5RA2LQCJ
(hd0)/dev/disk/by-id/ata-Maxtor_6L160P0_L31AHTVG
device.map.old
[Code]...
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Mar 27, 2011
system update today which moved the nvidia drivers from 195 to 260.After performing the update with synaptic and restarting, I noticed that my desktop theme, "Clearlooks," was messed up in that the shiny progress band was now two separate colours (blue and white). Tried other themes (among them "Glossy") and found most of them corrupted with, for example, the progress bar totally white.Similar problem with Iceweasel 4: the tabs have lost their inferior border, and the address/search bars are surrounded by white.I suspect (though I can't be sure) that the above is caused by the nvidia update. I did an "nvidia-xconfig" to try and see if this would change things, but no.
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Jul 9, 2011
I am in a bit of a jam. I had a dual boot backtrack 5 with windows 7, I had no need for the backtrack partition anymore so i deleted the backtrack partition and extended the windows NTFS to take up all free space, now my computer boots to grub but it will not boot into windows. I am currently in the process of creating a ubuntu live cd to do the following to repair the windows Master boot record.
sudo apt-get insall lilo
sudo lilo -m /dev/sda mbr
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