Thread: boot problem with Ubuntu 11.04 (Dualbooted with windows7)

hello, installed ubuntu 11.04 alongside windows 7 following guide linuxbsdos.com. absolutely new linux appreciated. gave 4 different partitions /boot, root directory, swap, , /home. placed grub 2 /boot partition. used easybcd says both ubuntu , windows 7 on boot menu, every restart goes directly windows. cannot access ubuntu @ all. saw forum on here , followed , instructions , got boot info summary if please appreciated.

thanks, brad





============================= boot info summary: ===============================

=> windows installed in mbr of /dev/sda.

sda1: __________________________________________________ ________________________

file system: ntfs
boot sector type: windows vista/7
boot sector info: no errors found in 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 boot parameter block.
============================ drive/partition info: =============================

drive: sda __________________________________________________ ___________________

disk /dev/sda: 500.1 gb, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 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 3,074,047 3,072,000 27 hidden ntfs (recovery environment)
/dev/sda2 3,074,048 771,971,071 768,897,024 7 ntfs / exfat / hpfs
/dev/sda3 771,973,118 976,771,071 204,797,954 5 extended
/dev/sda5 771,973,120 772,474,879 501,760 83 linux
/dev/sda6 772,476,928 776,380,415 3,903,488 82 linux swap / solaris
/dev/sda7 776,382,464 795,912,191 19,529,728 83 linux
/dev/sda8 795,914,240 976,771,071 180,856,832 83 linux


"blkid" output: __________________________________________________ ______________

device uuid type label

/dev/loop0 squashfs
/dev/sda1 c0ee3569ee3558bc ntfs system
/dev/sda2 c6245ba0245b9273 ntfs ti105835w0m
/dev/sda5 8a7cae9c-fb08-471d-ac25-9e7a6fd4c7fb ext2
/dev/sda6 51e99d9d-9420-4884-a691-16f8b3df91cb swap
/dev/sda7 0aceb7a6-875f-408d-ae9a-96e6dcbf4beb ext4
/dev/sda8 58eb0a0f-e42f-461d-ae11-59a69e1d1784 ext4

================================ mount points: =================================

device mount_point type options

/dev/loop0 /rofs squashfs (ro,noatime)
/dev/sda2 /tmp/bootinfo0/sda2 fuseblk (ro,nosuid,nodev,allow_other,blksize=4096)
/dev/sr0 /cdrom iso9660 (ro,noatime)


========================== sda2/grldr embedded menu: ===========================

--------------------------------------------------------------------------------

=============================== stderr messages: ===============================

/home/ubuntu/desktop/boot_info_script.sh: line 1888: ( / 2 ) + 16 : syntax error: operand expected (error token "/ 2 ) + 16 ")

looks thing on windows overwrote grub in mbr default windows boot loader.
master boot record or mbr first code executes when comp boots. supposed either load os directly( win boot loader) or give menu (the menu in boot partition in case of grub).

culprit antivirus software or dell data safe recovery software.(many viruses sneakily hide in mbr, grub mistaken)

confirm problem you:
1)boot live cd
2)mount boot partiton (i think /dev/sda5) nautilus side pane. confirm has /grub directory in it. path of mount point pressing ctrl+l .
"/media/8a7cae9c-fb08-471d-ac25-9e7a6fd4c7fb"
3) run

code:

sudo grub-install --boot-directory=/media/8a7cae9c-fb08-471d-ac25-9e7a6fd4c7fb /dev/sda

where "/media/8a...." mount point of boot partition.

when restart, should grub menu. if problem windows software, long dont boot windows, problem wont reappear( kind of poointless having menu) , when boot windows, ne boot not menu again.

i'll around , post link forum thread gives list of windows softwre may give trouble , them.

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