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A week ago my computer was running fine, I shut it down for the night and the next day it booted into grub rescue. I Followed tutorials to fix it but nothing worked, so I did a fresh install of Ubuntu 16.04, and a day later it did it again.

Why is this happening if I'm not doing anything to cause it?

Specs: mid 2010 MBP, booting just Ubuntu 16.04

ubuntu@ubuntu:~$ df
Filesystem     1K-blocks    Used Available Use% Mounted on
udev             3941256       0   3941256   0% /dev
tmpfs             791180    9768    781412   2% /run
/dev/sdb         1477840 1477840         0 100% /cdrom
/dev/loop0       1425792 1425792         0 100% /rofs
/cow             3955888   18952   3936936   1% /
tmpfs            3955888     220   3955668   1% /dev/shm
tmpfs               5120       4      5116   1% /run/lock
tmpfs            3955888       0   3955888   0% /sys/fs/cgroup
tmpfs            3955888     132   3955756   1% /tmp
tmpfs             791180      68    791112   1% /run/user/999
ubuntu@ubuntu:~$ sudo fdisk -l
Disk /dev/ram0: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/ram1: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/ram2: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/ram3: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/ram4: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/ram5: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/ram6: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/ram7: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/ram8: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/ram9: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/ram10: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/ram11: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/ram12: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/ram13: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/ram14: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/ram15: 64 MiB, 67108864 bytes, 131072 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/loop0: 1.4 GiB, 1459982336 bytes, 2851528 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 /dev/sda: 232.9 GiB, 250059350016 bytes, 488397168 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
Disklabel type: gpt
Disk identifier: 5AF97ECF-85DB-41E9-B2AC-F27F31D3AAAD

Device         Start       End   Sectors   Size Type
/dev/sda1       2048   1050623   1048576   512M EFI System
/dev/sda2    1050624 472152063 471101440 224.7G Linux filesystem
/dev/sda3  472152064 488396799  16244736   7.8G Linux swap




Disk /dev/sdb: 14.9 GiB, 16008609792 bytes, 31266816 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
Disklabel type: dos
Disk identifier: 0x40a863e7

Device     Boot   Start     End Sectors  Size Id Type
/dev/sdb1  *          0 2955679 2955680  1.4G  0 Empty
/dev/sdb2       2927216 2931951    4736  2.3M ef EFI (FAT-12/16/32)
ubuntu@ubuntu:~$

gparted

Used boot-repair, it finished and said it had an error and gave me this URl http://paste2.org/xXBEvzfx

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    In terminal, do these commands, df and sudo fdisk -l (lower case L), and edit your question to include the results. Also post a screenshot of gparted view of your hard disk. Cheers, Al
    – heynnema
    Commented Oct 7, 2016 at 16:48
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    Boot the Ubuntu Live DVD, and get the gparted screenshot from there. In terminal, try the df and sudo fdisk -l commands. Edit your answer with the results. ps: Were you dual-booting with Windows 10? Cheers, Al
    – heynnema
    Commented Oct 7, 2016 at 17:09
  • 1
    Yes u can do it with live USB too
    – minigeek
    Commented Oct 7, 2016 at 19:12
  • 1
    I'll put my next comment in an answer so I can format it. See below. Al
    – heynnema
    Commented Oct 7, 2016 at 22:06
  • 1
    I almost missed that you have posted your boot-repair info. You need to post a comment addressed to me by starting it with @heynnema. Anyway, when you installed Ubuntu, did you try and copy the Ubuntu .iso to sdb? Both sda and sdb are strange. Somehow you must be installing it wrong. Do this... (I assume you have no data on sda) boot the Ubuntu Live DVD. Using gparted, lay down fresh gpt partition tables on BOTH sda and sdb (effectively wiping them out). Then double-click the Install Ubuntu icon and reinstall Ubuntu (erase & install) on sda. (We'll worry about sdb later).
    – heynnema
    Commented Oct 8, 2016 at 13:52

1 Answer 1

Reset to default
2

From the comments...

Boot to the Ubuntu Live DVD or USB. In terminal, enter the following:

sudo add-apt-repository ppa:yannubuntu/boot-repair && sudo apt-get update  
sudo apt-get install -y boot-repair && (boot-repair &)

or, if this is easier for you to type:

sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install -y boot-repair
boot-repair

Lets see if boot-repair can solve your booting/grub rescue problem.

Cheers, Al

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