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My computer (zenbook UX31A) and I have Ubuntu 13.10 and Windows 8 installed (on different partitions). My Ubuntu suddenly stopped working yesterday... I first got a "kernel panicked" screen and then I forced shutdown and restarted it and it went directly to grub line command Something of the form

GNU grub version 2.00-19ubuntu2.1

[ Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists the possible completions of a device/filename. ]

grub> _

I tried to reinstall ubuntu from a live USB but I get an error of the form

Installation failed The installer encountered an unrecoverable error. A desktop session will now be run so that you may investigate the problem or try installing again.

Then I tried to mount the partition with Ubuntu and to reinstall the grub - following the instructions here http://www.webupd8.org/2009/12/how-to-recover-grub2-linux.html

no error occured but it didn't work. On the other hand funny thing happens: when I run fdisk -l I don't get al my sda1,sda2,...,sda7. I only get /dev/sda1 then /dev/sdb and device boot /def/sdb1 (which should be the USB stick I'm using).

Then I tried boot-repair but it also gave me some error at the end. "An error occurred during the repair." It also prompted several times to me that the boot is in legacy mode and I should retry in EFI mode - but in EFI mode the liveUSB won't boot (I mean it boots but it stays black immediately after I choose an option (try ubuntu, install ubuntu, etc.))

Here are the details (I tried several times)

http://paste.ubuntu.com/7049571/

http://paste.ubuntu.com/7049579/

http://paste.ubuntu.com/7049585/

Here's also the results of the bootinfo


============================= Boot Info Summary: ===============================

=> Grub2 (v1.99) is installed in the MBR of /dev/sda and looks at sector 198998016 of the same hard drive for core.img. core.img is at this location and looks in partition 94 for . => Syslinux MBR (4.04 and higher) is installed in the MBR of /dev/sdb.

sda1: __________________________________________

File system:       vfat
Boot sector type:  Unknown
Boot sector info:  No errors found in the Boot Parameter Block.
Operating System:  
Boot files:        /efi/Boot/bkpbootx64.efi /efi/Boot/bootx64.efi 
                   /efi/ubuntu/grubx64.efi /efi/ubuntu/MokManager.efi 
                   /efi/ubuntu/shimx64.efi

sda2: __________________________________________

File system:       ntfs
Boot sector type:  Windows Vista/7: NTFS
Boot sector info:  No errors found in the Boot Parameter Block.
Mounting failed:   mount: according to mtab, /dev/sda2 is already mounted on /tmp/BootInfo-GHfasxEP/sda2

mount: according to mtab, /dev/sda2 is already mounted on /tmp/BootInfo-GHfasxEP/sda2

sda3: __________________________________________

File system:       
Boot sector type:  -
Boot sector info: 
Mounting failed:   mount: according to mtab, /dev/sda2 is already mounted on /tmp/BootInfo-GHfasxEP/sda2

mount: according to mtab, /dev/sda2 is already mounted on /tmp/BootInfo-GHfasxEP/sda2

mount: unknown filesystem type ''

sda4: __________________________________________

File system:       ntfs
Boot sector type:  Windows Vista/7: NTFS
Boot sector info:  No errors found in the Boot Parameter Block.
Mounting failed:   mount: according to mtab, /dev/sda2 is already mounted on /tmp/BootInfo-GHfasxEP/sda2

mount: according to mtab, /dev/sda2 is already mounted on /tmp/BootInfo-GHfasxEP/sda2

mount: unknown filesystem type '' mount: according to mtab, /dev/sda4 is already mounted on /tmp/BootInfo-GHfasxEP/sda4

mount: according to mtab, /dev/sda4 is already mounted on /tmp/BootInfo-GHfasxEP/sda4

sda5: __________________________________________

File system:       ext4
Boot sector type:  -
Boot sector info: 
Operating System:  Ubuntu 13.10
Boot files:        /etc/fstab

sda6: __________________________________________

File system:       ntfs
Boot sector type:  Windows Vista/7: NTFS
Boot sector info:  No errors found in the Boot Parameter Block.
Mounting failed:   mount: according to mtab, /dev/sda2 is already mounted on /tmp/BootInfo-GHfasxEP/sda2

mount: according to mtab, /dev/sda2 is already mounted on /tmp/BootInfo-GHfasxEP/sda2

mount: unknown filesystem type '' mount: according to mtab, /dev/sda4 is already mounted on /tmp/BootInfo-GHfasxEP/sda4

mount: according to mtab, /dev/sda4 is already mounted on /tmp/BootInfo-GHfasxEP/sda4

mount: according to mtab, /dev/sda6 is already mounted on /tmp/BootInfo-GHfasxEP/sda6

mount: according to mtab, /dev/sda6 is already mounted on /tmp/BootInfo-GHfasxEP/sda6

sda7: __________________________________________

File system:       
Boot sector type:  -
Boot sector info: 
Mounting failed:   mount: according to mtab, /dev/sda2 is already mounted on /tmp/BootInfo-GHfasxEP/sda2

mount: according to mtab, /dev/sda2 is already mounted on /tmp/BootInfo-GHfasxEP/sda2

mount: unknown filesystem type '' mount: according to mtab, /dev/sda4 is already mounted on /tmp/BootInfo-GHfasxEP/sda4

mount: according to mtab, /dev/sda4 is already mounted on /tmp/BootInfo-GHfasxEP/sda4

mount: according to mtab, /dev/sda6 is already mounted on /tmp/BootInfo-GHfasxEP/sda6

mount: according to mtab, /dev/sda6 is already mounted on /tmp/BootInfo-GHfasxEP/sda6

mount: unknown filesystem type ''

sda8: __________________________________________

File system:       ntfs
Boot sector type:  Windows Vista/7: NTFS
Boot sector info:  No errors found in the Boot Parameter Block.
Mounting failed:   mount: according to mtab, /dev/sda2 is already mounted on /tmp/BootInfo-GHfasxEP/sda2

mount: according to mtab, /dev/sda2 is already mounted on /tmp/BootInfo-GHfasxEP/sda2

mount: unknown filesystem type '' mount: according to mtab, /dev/sda4 is already mounted on /tmp/BootInfo-GHfasxEP/sda4

mount: according to mtab, /dev/sda4 is already mounted on /tmp/BootInfo-GHfasxEP/sda4

mount: according to mtab, /dev/sda6 is already mounted on /tmp/BootInfo-GHfasxEP/sda6

mount: according to mtab, /dev/sda6 is already mounted on /tmp/BootInfo-GHfasxEP/sda6

mount: unknown filesystem type '' mount: according to mtab, /dev/sda8 is already mounted on /tmp/BootInfo-GHfasxEP/sda8

mount: according to mtab, /dev/sda8 is already mounted on /tmp/BootInfo-GHfasxEP/sda8

sda9: __________________________________________

File system:       BIOS Boot partition
Boot sector type:  Grub2's core.img
Boot sector info: 

sda10: _________________________________________

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

sdb1: __________________________________________

File system:       vfat
Boot sector type:  SYSLINUX 4.07 2013-07-25
Boot sector info:  Syslinux looks at sector 60824 of /dev/sdb1 for its 
                   second stage. SYSLINUX is installed in the /uui 
                   directory. No errors found in the Boot Parameter Block.
Operating System:  
Boot files:        /boot/grub/grub.cfg /efi/BOOT/grubx64.efi

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

Drive: sda _______________________________________

Disk /dev/sda: 128.0 GB, 128035676160 bytes 255 heads, 63 sectors/track, 15566 cylinders, total 250069680 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 1 250,069,679 250,069,679 ee GPT

GUID Partition Table detected.

Partition Start Sector End Sector # of Sectors System /dev/sda1 2,048 616,447 614,400 EFI System partition /dev/sda2 616,448 2,459,647 1,843,200 Windows Recovery Environment (Windows) /dev/sda3 2,459,648 2,721,791 262,144 Microsoft Reserved Partition (Windows) /dev/sda4 2,721,792 153,944,063 151,222,272 Data partition (Windows/Linux) /dev/sda5 153,944,064 198,998,015 45,053,952 Data partition (Windows/Linux) /dev/sda6 199,000,064 199,716,863 716,800 Windows Recovery Environment (Windows) /dev/sda7 199,716,864 208,105,471 8,388,608 - /dev/sda8 208,105,472 241,680,383 33,574,912 Windows Recovery Environment (Windows) /dev/sda9 198,998,016 199,000,063 2,048 BIOS Boot partition /dev/sda10 241,680,384 250,068,991 8,388,608 Swap partition (Linux)

Drive: sdb _______________________________________

Disk /dev/sdb: 8004 MB, 8004304896 bytes 247 heads, 62 sectors/track, 1020 cylinders, total 15633408 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/sdb1 * 62 15,620,279 15,620,218 c W95 FAT32 (LBA)

"blkid" output: ____________________________________

Device UUID TYPE LABEL

/dev/loop0 squashfs
/dev/loop1 f7d1f711-9329-e34b-9531-4e5b38000406 ext2 casper-rw /dev/sda1 AAEC-68A5 vfat SYSTEM /dev/sda10 735b1b4e-c7b0-4d92-b6e0-7ce2336e96bc swap
/dev/sda2 6204D14004D117BD ntfs Recovery /dev/sda4 90CEDA8ACEDA684C ntfs OS /dev/sda5 d1515ac5-ae0b-40b6-8b18-a500828f4c49 ext4
/dev/sda6 7E44F3B044F368F3 ntfs
/dev/sda8 DE36E15136E12AEB ntfs Restore /dev/sdb1 1204-0A22 vfat UUI

================================ Mount points: =================================

Device Mount_Point Type Options

/dev/loop0 /rofs squashfs (ro,noatime) /dev/sdb1 /cdrom vfat (rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro)

=============================== sda5/etc/fstab: ================================


/etc/fstab: static file system information.

#

Use 'blkid' 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).

#

/ was on /dev/sda5 during installation

UUID=d1515ac5-ae0b-40b6-8b18-a500828f4c49 / ext4 errors=remount-ro 0 1 UUID=AAEC-68A5 /boot/efi vfat defaults 0 1 UUID=90CEDA8ACEDA684C /media/dragos/OS ntfs rw,auto,users,exec,nls=utf8,umask=003,gid=46,uid=1000 0 0

UUID=735b1b4e-c7b0-4d92-b6e0-7ce2336e96bc none swap sw 0 0

=================== sda5: Location of files loaded by Grub: ====================

       GiB - GB             File                                 Fragment(s)

=========================== sdb1/boot/grub/grub.cfg: ===========================


if loadfont /boot/grub/font.pf2 ; then set gfxmode=auto insmod efi_gop insmod efi_uga insmod gfxterm terminal_output gfxterm fi

set menu_color_normal=white/black set menu_color_highlight=black/light-gray

menuentry "Try Ubuntu without installing" { set gfxpayload=keep linux /casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed cdrom-detect/try-usb=true persistent noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper quiet splash -- initrd /casper/initrd.lz } menuentry "Install Ubuntu" { set gfxpayload=keep linux /casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed cdrom-detect/try-usb=true persistent noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper only-ubiquity quiet splash -- initrd /casper/initrd.lz } menuentry "OEM install (for manufacturers)" { set gfxpayload=keep linux /casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed cdrom-detect/try-usb=true persistent noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper only-ubiquity quiet splash oem-config/enable=true -- initrd /casper/initrd.lz } menuentry "Check disc for defects" { set gfxpayload=keep linux /casper/vmlinuz.efi cdrom-detect/try-usb=true persistent noprompt floppy.allowed_drive_mask=0 ignore_uuid boot=casper integrity-check quiet splash -- initrd /casper/initrd.lz

}

=================== sdb1: Location of files loaded by Grub: ====================

       GiB - GB             File                                 Fragment(s)

======================== Unknown MBRs/Boot Sectors/etc: ========================

Unknown GPT Partiton Type dee2bfd3af3ddf11ba40e3a556d89593 Unknown BootLoader on sda1

00000000 eb 58 90 4d 53 44 4f 53 35 2e 30 00 02 08 5e 1b |.X.MSDOS5.0...^.| 00000010 02 00 00 00 00 f8 00 00 3f 00 ff 00 00 08 00 00 |........?.......| 00000020 00 60 09 00 51 02 00 00 00 00 00 00 02 00 00 00 |...Q...........| 00000030 01 00 06 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00000040 80 01 29 a5 68 ec aa 4e 4f 20 4e 41 4d 45 20 20 |..).h..NO NAME | 00000050 20 20 46 41 54 33 32 20 20 20 33 c9 8e d1 bc f4 | FAT32 3.....| 00000060 7b 8e c1 8e d9 bd 00 7c 88 56 40 88 4e 02 8a 56 |{......|.V@.N..V| 00000070 40 b4 41 bb aa 55 cd 13 72 10 81 fb 55 aa 75 0a |@.A..U..r...U.u.| 00000080 f6 c1 01 74 05 fe 46 02 eb 2d 8a 56 40 b4 08 cd |...t..F..-.V@...| 00000090 13 73 05 b9 ff ff 8a f1 66 0f b6 c6 40 66 0f b6 |.s......f...@f..| 000000a0 d1 80 e2 3f f7 e2 86 cd c0 ed 06 41 66 0f b7 c9 |...?.......Af...| 000000b0 66 f7 e1 66 89 46 f8 83 7e 16 00 75 39 83 7e 2a |f..f.F..~..u9.~*| 000000c0 00 77 33 66 8b 46 1c 66 83 c0 0c bb 00 80 b9 01 |.w3f.F.f........| 000000d0 00 e8 2c 00 e9 a8 03 a1 f8 7d 80 c4 7c 8b f0 ac |..,......}..|...| 000000e0 84 c0 74 17 3c ff 74 09 b4 0e bb 07 00 cd 10 eb |..t.<.t.........| 000000f0 ee a1 fa 7d eb e4 a1 7d 80 eb df 98 cd 16 cd 19 |...}...}........| 00000100 66 60 80 7e 02 00 0f 84 20 00 66 6a 00 66 50 06 |f.~.... .fj.fP.| 00000110 53 66 68 10 00 01 00 b4 42 8a 56 40 8b f4 cd 13 |Sfh.....B.V@....| 00000120 66 58 66 58 66 58 66 58 eb 33 66 3b 46 f8 72 03 |fXfXfXfX.3f;F.r.| 00000130 f9 eb 2a 66 33 d2 66 0f b7 4e 18 66 f7 f1 fe c2 |..*f3.f..N.f....| 00000140 8a ca 66 8b d0 66 c1 ea 10 f7 76 1a 86 d6 8a 56 |..f..f....v....V| 00000150 40 8a e8 c0 e4 06 0a cc b8 01 02 cd 13 66 61 0f |@............fa.| 00000160 82 74 ff 81 c3 00 02 66 40 49 75 94 c3 42 4f 4f |.t.....f@Iu..BOO| 00000170 54 4d 47 52 20 20 20 20 00 00 00 00 00 00 00 00 |TMGR ........| 00000180 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| * 000001a0 00 00 00 00 00 00 00 00 00 00 00 00 0d 0a 44 69 |..............Di| 000001b0 73 6b 20 65 72 72 6f 72 ff 0d 0a 50 72 65 73 73 |sk error...Press| 000001c0 20 61 6e 79 20 6b 65 79 20 74 6f 20 72 65 73 74 | any key to rest| 000001d0 61 72 74 0d 0a 00 00 00 00 00 00 00 00 00 00 00 |art.............| 000001e0 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 ac 01 b9 01 00 00 55 aa |..............U.| 00000200

========= Devices which don't seem to have a corresponding hard drive: =========

sdc

=============================== StdErr Messages: ===============================

cat: /tmp/BootInfo-GHfasxEP/Tmp_Log: No such file or directory cat: /tmp/BootInfo-GHfasxEP/Tmp_Log: No such file or directory No volume groups found

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