grub-pc problems

[Shpadoinkle]

When trying to install grub-pc on ubuntu 10.04, i get a pop-up window that i have included a screenshot of. Any help would be appreciated.

[drs305]

That is a normal step in the Grub2 install. It is asking if you need any special options during boot, such as "noapic", etc. Chances are good that you don't need any, or if you do you already know what to type there.

If you don't need any special kernel instructions, just TAB to the "OK" prompt and press ENTER to continue with the install.

[Shpadoinkle]

well, when i do that i get this...

[Shpadoinkle]

and heres the output...

[drs305]

Grub 2 failed to install correctly for some reason, but it isn't related to the first post.

You can try a reinstall to see if that corrects the problem:

sudo apt-get install --reinstall grub-pc

Before continuing, you might want to explain why you are installing Grub2. It should have already been on your machine when you installed 10.04 under normal circumstances. Reinstalling may not be what you need to do...

If you want to continue trying to fix things without further explanation, you could try purging it completely and reinstalling, although this may also be unsuccessful. If you choose this option, make sure you have a good Internet connection and power supply, as you will not have a bootloader on your machine for a very brief period.

Assuming you are currently in a normal Ubuntu installation (not a LiveCD or wubi), run these commands. The first removes grub-pc and grub-common, the second reinstalls them:

sudo apt-get purge grub-common
sudo apt-get install grub-pc
When you get to the partitioning section, choose the drive (sda, sdb) you want Grub2 installed on - do not include a partition number.

If you continue to have "postinst" errors, let us know.

[Shpadoinkle]

well, none of the above seemed to have fixed the problem. When i updated ubuntu after installing from the cd is when i first had this problem. everything worked fine until I updated. this is the output from the first code given...

Setting up grub-pc (1.98-1ubuntu7) ...
dpkg: error processing grub-pc (--configure):
subprocess installed post-installation script returned error exit status 10
Errors were encountered while processing:
grub-pc
E: Sub-process /usr/bin/dpkg returned an error code (1)

[drs305]

I sort of expected that result but was hopeful...

The reason is that the next thing I'll recommend 'bypasses' APT by removing access to the post-install script. It's not as clean a solution, but it will most likely work.

We will rename the script which is generating the error. Renaming it will allow us to restore it to the original name if this attempt doesn't work, making it better than deleting the file completely.


sudo mv /var/lib/dpkg/info/grub-pc.postinst /var/lib/dpkg/info/grub-pc.postinst.bad

Then try reinstalling grub-pc.

[Shpadoinkle]

well, i did everything above, reinstalled grub-pc and rebooted. No linux kernals are showing up now, only memtest86.

[drs305]

well, i did everything above, reinstalled grub-pc and rebooted. No linux kernals are showing up now, only memtest86.

Time to run meierfra's boot info script. Go to the link, download the script, run it according to the instructions on the site, and then post the contents here.

When you post the contents of RESULTS.txt, please copy them into the post, highlight them, and then press the # icon in the post's menubar to enclose the results within "code" tags.

The information will allow us to see the status of your Ubuntu system. If you can't get into your normal install, run the script from the LiveCD/install CD and it will give us the same information.

http://bootinfoscript.sourceforge.net

[Shpadoinkle]

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 /boot/grub.

sda1: __________________________________________________ _______________________

File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 10.04.1 LTS
Boot files/dirs: /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img

sda2: __________________________________________________ _______________________

File system: Extended Partition
Boot sector type: Unknown
Boot sector info:

sda5: __________________________________________________ _______________________

File system: swap
Boot sector type: -
Boot sector info:

=========================== Drive/Partition Info: =============================

Drive: sda ___________________ __________________________________________________ ___

Disk /dev/sda: 120.0 GB, 120034123776 bytes
255 heads, 63 sectors/track, 14593 cylinders, total 234441648 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start End Size Id System

/dev/sda1 * 2,048 224,827,391 224,825,344 83 Linux
/dev/sda2 224,829,438 234,440,703 9,611,266 5 Extended
/dev/sda5 224,829,440 234,440,703 9,611,264 82 Linux swap / Solaris


blkid -c /dev/null: __________________________________________________ __________

Device UUID TYPE LABEL

/dev/loop0 squashfs
/dev/sda1 f0c7842f-14ba-4592-96c5-b2c6a4be0d45 ext4
/dev/sda2: PTTYPE="dos"
/dev/sda5 059a9b72-bed5-47e5-8b2b-d968f949f341 swap
/dev/sda: PTTYPE="dos"

============================ "mount | grep ^/dev output: ===========================

Device Mount_Point Type Options

aufs / aufs (rw)
/dev/sr0 /cdrom iso9660 (ro,noatime)
/dev/loop0 /rofs squashfs (ro,noatime)


=========================== sda1/boot/grub/grub.cfg: ===========================

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set f0c7842f-14ba-4592-96c5-b2c6a4be0d45
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set f0c7842f-14ba-4592-96c5-b2c6a4be0d45
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

=============================== sda1/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
# / was on /dev/sda1 during installation
UUID=f0c7842f-14ba-4592-96c5-b2c6a4be0d45 / ext4 errors=remount-ro 0 1
# swap was on /dev/sda5 during installation
UUID=059a9b72-bed5-47e5-8b2b-d968f949f341 none swap sw 0 0

=================== sda1: Location of files loaded by Grub: ===================


77.4GB: boot/grub/core.img
95.0GB: boot/grub/grub.cfg
77.4GB: boot/initrd.img-2.6.32-21-generic
77.5GB: boot/initrd.img-2.6.32-24-generic
77.5GB: boot/initrd.img-2.6.32-25-generic
77.4GB: boot/vmlinuz-2.6.32-21-generic
77.4GB: boot/vmlinuz-2.6.32-24-generic
77.5GB: boot/vmlinuz-2.6.32-25-generic
77.5GB: initrd.img
77.5GB: initrd.img.old
77.5GB: vmlinuz
77.4GB: vmlinuz.old
=========================== Unknown MBRs/Boot Sectors/etc =======================

Unknown BootLoader on sda2

00000000 53 29 0b e9 c1 d1 eb 0c e8 83 90 94 ab 56 53 8c |S)...........VS.|
00000010 5d 77 a4 26 04 75 1a e9 ce ac d2 de 9b ca e4 80 |]w.&.u..........|
00000020 94 cf ab 19 91 99 fb d8 4d 5a ff fd 95 93 9c 71 |........MZ.....q|
00000030 12 84 a5 be b2 8d 42 88 c5 4a d4 8f 99 1b c0 78 |......B..J.....x|
00000040 7b 34 d9 99 81 19 c3 a9 8f 90 cf 8f 86 14 58 e1 |{4............X.|
00000050 55 42 86 12 9e a8 58 d9 3a 2a 37 f3 33 28 68 4c |UB....X.:*7.3(hL|
00000060 ae 37 2b e1 21 21 24 01 c9 09 47 c2 f1 74 e5 46 |.7+.!!$...G..t.F|
00000070 27 2d 99 be 90 f3 a8 dc 7b 44 c7 67 f8 d9 51 56 |'-......{D.g..QV|
00000080 6b f7 85 a0 bb 3f c0 83 1c 5c 00 9d bb 76 1e 5f |k....?...\...v._|
00000090 e1 a4 0c 19 4b d7 6a 71 bc 5e 93 c3 4c fd 4e ab |....K.jq.^..L.N.|
000000a0 90 c1 ca 0e 62 16 a3 4b bb 2b 06 59 8e 95 5c a9 |....b..K.+.Y..\.|
000000b0 d0 6e 4f 04 2d f0 3e 24 2f 37 7f 87 83 01 46 e1 |.nO.-.>$/7....F.|
000000c0 cc c4 4c 38 63 ce 23 82 aa 90 51 a0 ac 25 32 ea |..L8c.#...Q..%2.|
000000d0 d9 48 cc 31 d4 fa 17 cb 85 b2 d5 1e 7d e9 64 92 |.H.1........}.d.|
000000e0 1a ae f8 9f b4 73 a4 6d ab cf 45 04 4f 36 7d 16 |.....s.m..E.O6}.|
000000f0 b8 da 6d 62 27 4f 18 f4 4e c7 5f 32 4d 04 54 7a |..mb'O..N._2M.Tz|
00000100 96 7a 66 05 3c eb 70 1e de ef c4 5f a2 d8 91 55 |.zf.<.p...._...U|
00000110 76 a4 4f 8b ed 3a fe da 67 a1 c4 38 9a 1d e3 5c |v.O..:..g..8...\|
00000120 5c 04 d5 98 10 4c 13 14 cb a7 69 95 ca e5 e5 8a |\....L....i.....|
00000130 d2 06 d5 9f a1 1d 32 7c ee 30 fb 15 a2 f2 bc 76 |......2|.0.....v|
00000140 08 02 94 04 14 e6 d6 c3 f0 ea 1e 29 23 78 79 a8 |...........)#xy.|
00000150 92 4a 83 f8 e4 60 1a 02 1c 55 60 d9 2c 62 e4 e6 |.J...`...U`.,b..|
00000160 02 39 e0 20 b0 9e 41 58 a0 6b 0a 6c 48 26 2e 6c |.9. ..AX.k.lH&.l|
00000170 22 44 60 34 1e b1 13 42 2c a3 29 0e a3 c2 66 96 |"D`4...B,.)...f.|
00000180 0e 06 8e b8 47 3a 31 8d 4c 5d c2 73 b8 86 5b 50 |....G:1.L].s..[P|
00000190 70 3d b6 5d 8f 4b c6 a1 e8 3e 5a 40 5a 5f 5e 27 |p=.].K...>Z@Z_^'|
000001a0 28 fb 19 45 3b 33 38 a6 67 61 6b 58 ab 4b 1c 42 |(..E;38.gakX.K.B|
000001b0 12 0b 0b 14 e2 61 21 15 a0 61 89 83 e6 65 00 fe |.....a!..a...e..|
000001c0 ff ff 82 fe ff ff 02 00 00 00 00 a8 92 00 00 00 |................|
000001d0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
00000200