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How to restore boot loader on Ubuntu 11.04 - 2011
Hello,
I am not sure what happened or what I did, but when I start my PC up, I do not physically see my boot menu splash screen to select.scroll down to Ubuntu or Windows when booting up. My screen goes black (monitor light turns yellow) and after a few minutes monitor light turns green, Ubuntu log-in screen boots appears, where you have to enter your password. Can someone tell me what is going on...? Is there anyway to restore my dual boot loader to the original state...without reinstalling? Thanks, d-1 |
If you hold down the 'shift' key, the grub screen should appear.
Check out this thread and the link it contains: http://www.linuxquestions.org/questi...1/#post4392037 |
Thanks Andrew, I tried that, even though I felt skeptical about it and that did not work.
But thanks, d-1 |
Did you hold down the shift key the entire duration of the BIOS POST?
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Yes holding the shift key should work.
However, if you are booting into Ubuntu you could check grub out from there and make sure it has every thing it should have. It does not right now. If you had your Win JerryLewis Pro in the menu it would show up as with more than one OS grub displays, or is supposed to display the menu. I would think that you should boot to Ubuntu and run this script; http://bootinfoscript.sourceforge.net/ and post it here. You could also just try running, in terminal; Code:
sudo update-grub]Code:
sudo grub-mkconfig |
What I'm thinking happened, which has happened to me, is he had Ubuntu installed, then he went and installed Windows. Windows automatically overwrites Grub, and along with that; can't boot Ubuntu.
Sorry I can't provide further help if that's the situation considering I'm in the exact same one. (Just not caring about the linux partition.) |
No Bobbyroylee, windows7 was already there, I just installed the new version of Ubuntu because the old version was no longer seeing my iPhone, so I am upgraded to the new version. I ran a few tweaks here and there, and now my screen goes black, but eventually boots to Ubuntu, but bypasses bootloader.
My SuperGrub CD allows me to boot to windows or Ubuntu, but somehow I have to figure out a way to restore bootloader. I ran this: $ sudo update-grub Searching for GRUB installation directory ... found: /boot/grub Searching for default file ... Generating /boot/grub/default file and setting the default boot entry to 0 Searching for GRUB installation directory ... found: /boot/grub Testing for an existing GRUB menu.lst file ... Could not find /boot/grub/menu.lst file. Would you like /boot/grub/menu.lst generated for you? (y/N) y Searching for splash image ... none found, skipping ... Found kernel: /boot/memtest86+.bin Found kernel: /boot/vmlinuz-2.6.38-8-generic Found kernel: /boot/memtest86+.bin Updating /boot/grub/menu.lst ... done sudo grub-mkconfig Generating grub.cfg ... # # DO NOT EDIT THIS FILE # # It is automatically generated by grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### if [ -s $prefix/grubenv ]; then set have_grubenv=true load_env fi set default="0" if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi } function load_video { insmod vbe insmod vga insmod video_bochs insmod video_cirrus } insmod part_msdos insmod ext2 set root='(/dev/sda,msdos8)' search --no-floppy --fs-uuid --set=root 85032c9e-8499-480e-9be3-843590f12180 if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=auto load_video insmod gfxterm fi terminal_output gfxterm insmod part_msdos insmod ext2 set root='(/dev/sda,msdos8)' search --no-floppy --fs-uuid --set=root 85032c9e-8499-480e-9be3-843590f12180 set locale_dir=($root)/boot/grub/locale set lang=en_US insmod gettext if [ "${recordfail}" = 1 ]; then set timeout=-1 else set timeout=10 fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/light-gray if background_color 44,0,30; then clear fi ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### if [ ${recordfail} != 1 ]; then if [ -e ${prefix}/gfxblacklist.txt ]; then if hwmatch ${prefix}/gfxblacklist.txt 3; then if [ ${match} = 0 ]; then set linux_gfx_mode=keep else set linux_gfx_mode=text fi else set linux_gfx_mode=text fi else set linux_gfx_mode=keep fi else set linux_gfx_mode=text fi export linux_gfx_mode if [ "$linux_gfx_mode" != "text" ]; then load_video; fi Found linux image: /boot/vmlinuz-2.6.38-8-generic Found initrd image: /boot/initrd.img-2.6.38-8-generic menuentry 'Ubuntu, with Linux 2.6.38-8-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail set gfxpayload=$linux_gfx_mode insmod part_msdos insmod ext2 set root='(/dev/sda,msdos8)' search --no-floppy --fs-uuid --set=root 85032c9e-8499-480e-9be3-843590f12180 linux /boot/vmlinuz-2.6.38-8-generic root=UUID=85032c9e-8499-480e-9be3-843590f12180 ro quiet splash vt.handoff=7 initrd /boot/initrd.img-2.6.38-8-generic } menuentry 'Ubuntu, with Linux 2.6.38-8-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail set gfxpayload=$linux_gfx_mode insmod part_msdos insmod ext2 set root='(/dev/sda,msdos8)' search --no-floppy --fs-uuid --set=root 85032c9e-8499-480e-9be3-843590f12180 echo 'Loading Linux 2.6.38-8-generic ...' linux /boot/vmlinuz-2.6.38-8-generic root=UUID=85032c9e-8499-480e-9be3-843590f12180 ro single echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-2.6.38-8-generic } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/20_memtest86+ ### Found memtest86+ image: /boot/memtest86+.bin menuentry "Memory test (memtest86+)" { insmod part_msdos insmod ext2 set root='(/dev/sda,msdos8)' search --no-floppy --fs-uuid --set=root 85032c9e-8499-480e-9be3-843590f12180 linux16 /boot/memtest86+.bin } menuentry "Memory test (memtest86+, serial console 115200)" { insmod part_msdos insmod ext2 set root='(/dev/sda,msdos8)' search --no-floppy --fs-uuid --set=root 85032c9e-8499-480e-9be3-843590f12180 linux16 /boot/memtest86+.bin console=ttyS0,115200n8 } ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober ### Found Windows 7 (loader) on /dev/sda1 menuentry "Windows 7 (loader) (on /dev/sda1)" --class windows --class os { insmod part_msdos insmod ntfs set root='(/dev/sda,msdos1)' search --no-floppy --fs-uuid --set=root 286803116802DE06 chainloader +1 } ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### ### BEGIN /etc/grub.d/41_custom ### if [ -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ### END /etc/grub.d/41_custom ### done |
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Your right Andrew, Windows7 was already there.
When I installed Ubuntu 11.04, the boot loader worked fine, but somehow, it bypasses the bootloader, my monitor light turns yellow, which indicates to me my video driver is not working, screen goes black, and after 3 minutes or so, Ubuntu appears. I tried everything above with no positive results. d-1 |
You probably will have to purge and reinstall grub2, but first could you do as widget suggested EXCEPT run the bootinfoscript from the Ubuntu LiveCD.
Boot the LiveCD and go to http://bootinfoscript.sourceforge.net and post the results between tags in your reply. What you probably will have to do is follow this: Quote:
http://ubuntuforums.org/showthread.p...ighlight=grub2 |
Purging and reinstalling grub sounds like a good idea. "update-grub" should not be looking for the menu.list at all.
You could also edit the /etc/default/grub file to make sure that it is not calling for a hidden menu. If it is not calling for that purging and reinstalling would definitely be the way to go. If you can boot to Ubuntu you do not need the LiveCD to run the bootinfo script. |
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I ran this in LiveCD:
sudo bash ~/Downloads/boot_info_script.sh boot_info_script version: 0.60 [17 May 2011] "gawk" could not be found, using "busybox awk" instead. This may lead to unreliable results. Identifying MBRs... Computing Partition Table of /dev/sda... Searching sda1 for information... Searching sda2 for information... Searching sda3 for information... Searching sda5 for information... Searching sda6 for information... Searching sda7 for information... Searching sda8 for information... Searching sda9 for information... Finished. The results are in the file "RESULTS.txt" located in "/home/ubuntu/Downloads/". Results : Boot Info Script 0.60 from 17 May 2011 ============================= Boot Info Summary: =============================== => Grub2 (v1.99) is installed in the MBR of /dev/sda and looks at sector 1 of the same hard drive for core.img. core.img is at this location and looks for (,msdos8)/boot/grub on this drive. sda1: __________________________________________________________________________ File system: ntfs Boot sector type: Windows Vista/7 Boot sector info: No errors found in the Boot Parameter Block. Operating System: Boot files: /bootmgr /Boot/BCD sda2: __________________________________________________________________________ File system: ntfs Boot sector type: Windows Vista/7 Boot sector info: No errors found in the Boot Parameter Block. Operating System: Windows 7 Boot files: /Windows/System32/winload.exe sda3: __________________________________________________________________________ File system: Extended Partition Boot sector type: - Boot sector info: sda5: __________________________________________________________________________ File system: swap Boot sector type: - Boot sector info: sda6: __________________________________________________________________________ File system: ext3 Boot sector type: - Boot sector info: Operating System: Boot files: sda7: __________________________________________________________________________ File system: swap Boot sector type: - Boot sector info: sda8: __________________________________________________________________________ File system: ext4 Boot sector type: - Boot sector info: Operating System: Ubuntu 11.04 Boot files: /boot/grub/menu.lst /boot/grub/grub.cfg /etc/fstab sda9: __________________________________________________________________________ File system: swap Boot sector type: - Boot sector info: ============================ Drive/Partition Info: ============================= Drive: sda _____________________________________________________________________ Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes Partition Boot Start Sector End Sector # of Sectors Id System /dev/sda1 * 2,048 206,847 204,800 7 NTFS / exFAT / HPFS /dev/sda2 206,848 1,024,591,679 1,024,384,832 7 NTFS / exFAT / HPFS /dev/sda3 1,024,591,870 1,953,519,119 928,927,250 5 Extended /dev/sda5 1,049,781,663 1,057,961,519 8,179,857 82 Linux swap / Solaris /dev/sda6 1,057,961,583 1,953,519,119 895,557,537 83 Linux /dev/sda7 1,043,757,056 1,049,767,935 6,010,880 82 Linux swap / Solaris /dev/sda8 1,024,591,872 1,037,729,791 13,137,920 83 Linux /dev/sda9 1,037,731,840 1,043,742,719 6,010,880 82 Linux swap / Solaris "blkid" output: ________________________________________________________________ Device UUID TYPE LABEL /dev/loop0 squashfs /dev/sda1 286803116802DE06 ntfs System Reserved /dev/sda2 9E60055060053117 ntfs /dev/sda5 886238a4-5192-4156-a509-e82d88d07dd3 swap /dev/sda6 b8a3ab00-1f93-4f5a-9f99-f6697aa48ed3 ext3 /dev/sda7 d62e06de-8148-4aad-a176-497db9829f79 swap /dev/sda8 85032c9e-8499-480e-9be3-843590f12180 ext4 /dev/sda9 f72a940c-bf59-4ce5-9111-ab0b61c6d68e swap ================================ Mount points: ================================= Device Mount_Point Type Options /dev/loop0 /rofs squashfs (ro,noatime) /dev/sr0 /cdrom iso9660 (ro,noatime) =========================== sda8/boot/grub/menu.lst: =========================== -------------------------------------------------------------------------------- # menu.lst - See: grub(8), info grub, update-grub(8) # grub-install(8), grub-floppy(8), # grub-md5-crypt, /usr/share/doc/grub # and /usr/share/doc/grub-legacy-doc/. ## default num # Set the default entry to the entry number NUM. Numbering starts from 0, and # the entry number 0 is the default if the command is not used. # # You can specify 'saved' instead of a number. In this case, the default entry # is the entry saved with the command 'savedefault'. # WARNING: If you are using dmraid do not use 'savedefault' or your # array will desync and will not let you boot your system. default 0 ## timeout sec # Set a timeout, in SEC seconds, before automatically booting the default entry # (normally the first entry defined). timeout 3 ## hiddenmenu # Hides the menu by default (press ESC to see the menu) hiddenmenu # Pretty colours #color cyan/blue white/blue ## password ['--md5'] passwd # If used in the first section of a menu file, disable all interactive editing # control (menu entry editor and command-line) and entries protected by the # command 'lock' # e.g. password topsecret # password --md5 $1$gLhU0/$aW78kHK1QfV3P2b2znUoe/ # password topsecret # # examples # # title Windows 95/98/NT/2000 # root (hd0,0) # makeactive # chainloader +1 # # title Linux # root (hd0,1) # kernel /vmlinuz root=/dev/hda2 ro # # # Put static boot stanzas before and/or after AUTOMAGIC KERNEL LIST ### BEGIN AUTOMAGIC KERNELS LIST ## lines between the AUTOMAGIC KERNELS LIST markers will be modified ## by the debian update-grub script except for the default options below ## DO NOT UNCOMMENT THEM, Just edit them to your needs ## ## Start Default Options ## ## default kernel options ## default kernel options for automagic boot options ## If you want special options for specific kernels use kopt_x_y_z ## where x.y.z is kernel version. Minor versions can be omitted. ## e.g. kopt=root=/dev/hda1 ro ## kopt_2_6_8=root=/dev/hdc1 ro ## kopt_2_6_8_2_686=root=/dev/hdc2 ro # kopt=root=UUID=85032c9e-8499-480e-9be3-843590f12180 ro ## default grub root device ## e.g. groot=(hd0,0) # groot=85032c9e-8499-480e-9be3-843590f12180 ## should update-grub create alternative automagic boot options ## e.g. alternative=true ## alternative=false # alternative=true ## should update-grub lock alternative automagic boot options ## e.g. lockalternative=true ## lockalternative=false # lockalternative=false ## additional options to use with the default boot option, but not with the ## alternatives ## e.g. defoptions=vga=791 resume=/dev/hda5 # defoptions=quiet splash ## should update-grub lock old automagic boot options ## e.g. lockold=false ## lockold=true # lockold=false ## Xen hypervisor options to use with the default Xen boot option # xenhopt= ## Xen Linux kernel options to use with the default Xen boot option # xenkopt=console=tty0 ## altoption boot targets option ## multiple altoptions lines are allowed ## e.g. altoptions=(extra menu suffix) extra boot options ## altoptions=(recovery) single # altoptions=(recovery mode) single ## controls how many kernels should be put into the menu.lst ## only counts the first occurence of a kernel, not the ## alternative kernel options ## e.g. howmany=all ## howmany=7 # howmany=all ## specify if running in Xen domU or have grub detect automatically ## update-grub will ignore non-xen kernels when running in domU and vice versa ## e.g. indomU=detect ## indomU=true ## indomU=false # indomU=detect ## should update-grub create memtest86 boot option ## e.g. memtest86=true ## memtest86=false # memtest86=true ## should update-grub adjust the value of the default booted system ## can be true or false # updatedefaultentry=false ## should update-grub add savedefault to the default options ## can be true or false # savedefault=false ## ## End Default Options ## title Ubuntu 11.04, kernel 2.6.38-8-generic uuid 85032c9e-8499-480e-9be3-843590f12180 kernel /boot/vmlinuz-2.6.38-8-generic root=UUID=85032c9e-8499-480e-9be3-843590f12180 ro quiet splash initrd /boot/initrd.img-2.6.38-8-generic title Ubuntu 11.04, kernel 2.6.38-8-generic (recovery mode) uuid 85032c9e-8499-480e-9be3-843590f12180 kernel /boot/vmlinuz-2.6.38-8-generic root=UUID=85032c9e-8499-480e-9be3-843590f12180 ro single initrd /boot/initrd.img-2.6.38-8-generic title Ubuntu 11.04, memtest86+ uuid 85032c9e-8499-480e-9be3-843590f12180 kernel /boot/memtest86+.bin ### END DEBIAN AUTOMAGIC KERNELS LIST -------------------------------------------------------------------------------- =========================== sda8/boot/grub/grub.cfg: =========================== -------------------------------------------------------------------------------- # # DO NOT EDIT THIS FILE # # It is automatically generated by grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### if [ -s $prefix/grubenv ]; then set have_grubenv=true load_env fi set default="0" if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi } function load_video { insmod vbe insmod vga insmod video_bochs insmod video_cirrus } insmod part_msdos insmod ext2 set root='(/dev/sda,msdos8)' search --no-floppy --fs-uuid --set=root 85032c9e-8499-480e-9be3-843590f12180 if loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=auto load_video insmod gfxterm fi terminal_output gfxterm insmod part_msdos insmod ext2 set root='(/dev/sda,msdos8)' search --no-floppy --fs-uuid --set=root 85032c9e-8499-480e-9be3-843590f12180 set locale_dir=($root)/boot/grub/locale set lang=en_US insmod gettext if [ "${recordfail}" = 1 ]; then set timeout=-1 else set timeout=10 fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/light-gray if background_color 44,0,30; then clear fi ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### if [ ${recordfail} != 1 ]; then if [ -e ${prefix}/gfxblacklist.txt ]; then if hwmatch ${prefix}/gfxblacklist.txt 3; then if [ ${match} = 0 ]; then set linux_gfx_mode=keep else set linux_gfx_mode=text fi else set linux_gfx_mode=text fi else set linux_gfx_mode=keep fi else set linux_gfx_mode=text fi export linux_gfx_mode if [ "$linux_gfx_mode" != "text" ]; then load_video; fi menuentry 'Ubuntu, with Linux 2.6.38-8-generic' --class ubuntu --class gnu-linux --class gnu --class os { recordfail set gfxpayload=$linux_gfx_mode insmod part_msdos insmod ext2 set root='(/dev/sda,msdos8)' search --no-floppy --fs-uuid --set=root 85032c9e-8499-480e-9be3-843590f12180 linux /boot/vmlinuz-2.6.38-8-generic root=UUID=85032c9e-8499-480e-9be3-843590f12180 ro quiet splash vt.handoff=7 initrd /boot/initrd.img-2.6.38-8-generic } menuentry 'Ubuntu, with Linux 2.6.38-8-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os { recordfail set gfxpayload=$linux_gfx_mode insmod part_msdos insmod ext2 set root='(/dev/sda,msdos8)' search --no-floppy --fs-uuid --set=root 85032c9e-8499-480e-9be3-843590f12180 echo 'Loading Linux 2.6.38-8-generic ...' linux /boot/vmlinuz-2.6.38-8-generic root=UUID=85032c9e-8499-480e-9be3-843590f12180 ro single echo 'Loading initial ramdisk ...' initrd /boot/initrd.img-2.6.38-8-generic } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/20_memtest86+ ### menuentry "Memory test (memtest86+)" { insmod part_msdos insmod ext2 set root='(/dev/sda,msdos8)' search --no-floppy --fs-uuid --set=root 85032c9e-8499-480e-9be3-843590f12180 linux16 /boot/memtest86+.bin } menuentry "Memory test (memtest86+, serial console 115200)" { insmod part_msdos insmod ext2 set root='(/dev/sda,msdos8)' search --no-floppy --fs-uuid --set=root 85032c9e-8499-480e-9be3-843590f12180 linux16 /boot/memtest86+.bin console=ttyS0,115200n8 } ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober ### menuentry "Windows 7 (loader) (on /dev/sda1)" --class windows --class os { insmod part_msdos insmod ntfs set root='(/dev/sda,msdos1)' search --no-floppy --fs-uuid --set=root 286803116802DE06 chainloader +1 } ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### ### BEGIN /etc/grub.d/41_custom ### if [ -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ### END /etc/grub.d/41_custom ### -------------------------------------------------------------------------------- =============================== sda8/etc/fstab: ================================ -------------------------------------------------------------------------------- # /etc/fstab: static file system information. # # Use 'blkid -o value -s UUID' to print the universally unique identifier # for a device; this may be used with UUID= as a more robust way to name # devices that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 /dev/sda8 / ext4 errors=remount-ro 0 1 # swap was on /dev/sda9 during installation UUID=f72a940c-bf59-4ce5-9111-ab0b61c6d68e none swap sw 0 0 /dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0 -------------------------------------------------------------------------------- =================== sda8: Location of files loaded by Grub: ==================== GiB - GB File Fragment(s) 491.190643311 = 527.411937280 boot/grub/grub.cfg 1 492.809631348 = 529.150312448 boot/grub/menu.lst 2 493.122852325 = 529.486630912 boot/initrd.img-2.6.38-8-generic 2 492.926403046 = 529.275695104 boot/vmlinuz-2.6.38-8-generic 1 493.122852325 = 529.486630912 initrd.img 2 492.926403046 = 529.275695104 vmlinuz 1 ========= Devices which don't seem to have a corresponding hard drive: ========= sdb =============================== StdErr Messages: =============================== unlzma: Decoder error |
The above didn't work either, same issue...no boot loader....
d-1 |
Your bootinfoscript output looks like it should.
If the beginning of your /etc/default/grub looks like this: Code:
GRUB_DEFAULT=0 |
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