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Old 07-27-2015, 10:04 PM   #1
l33y
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Xubuntu 14.04 dual boot on Windows 8.1


I was wondering if someone can help me with my dual boot configuration. I followed the excellent instructions here: http://www.dedoimedo.com/computers/d...-8-ubuntu.html

However I am only able to access the installed Xubuntu partitions by using a system rescue disk, option 5. I ran bootinfoscript and have included the output below. Also, I chose to install the 32-bit version of Xubuntu, I am not sure if this makes a difference. Here is my output for fdisk -l
Code:
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 / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk identifier: 0x543dae44

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1               1   976773167   488386583+  ee  GPT
Partition 1 does not start on physical sector boundary.

Code:
                  Boot Info Script 0.61      [1 April 2012]


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

 => Grub Legacy0.97 is installed in the MBR of /dev/sda and looks at sector 
    761366176 of the same hard drive for the stage2 file.  A stage2 file is at 
    this location on /dev/sda.  Stage2 looks on partition #6 for 
    /boot/grub/menu.lst..

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/bootx64.efi

sda2: __________________________________________________________________________

    File system:       ntfs
    Boot sector type:  Windows Vista/7: NTFS
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System:  
    Boot files:        /bootmgr /Boot/BCD

sda3: __________________________________________________________________________

    File system:       
    Boot sector type:  -
    Boot sector info: 
    Mounting failed:   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.
    Operating System:  
    Boot files:        /bootmgr /Boot/BCD /Windows/System32/winload.exe

sda5: __________________________________________________________________________

    File system:       ntfs
    Boot sector type:  Windows Vista/7: NTFS
    Boot sector info:  No errors found in the Boot Parameter Block.
    Operating System:  
    Boot files:        

sda6: __________________________________________________________________________

    File system:       BIOS Boot partition
    Boot sector type:  -
    Boot sector info: 

sda7: __________________________________________________________________________

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

sda8: __________________________________________________________________________

    File system:       ext4
    Boot sector type:  -
    Boot sector info: 
    Operating System:  
    Boot files:        

============================ 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 / 4096 bytes

Partition  Boot  Start Sector    End Sector  # of Sectors  Id System

/dev/sda1                   1   976,773,167   976,773,167  ee GPT


GUID Partition Table detected.

Partition    Start Sector    End Sector  # of Sectors System
/dev/sda1           2,048       206,847       204,800 EFI System partition
/dev/sda2         206,848     2,050,047     1,843,200 Windows Recovery Environment (Windows)
/dev/sda3       2,050,048     2,312,191       262,144 Microsoft Reserved Partition (Windows)
/dev/sda4       2,312,192   719,112,191   716,800,000 Data partition (Windows/Linux)
/dev/sda5     934,809,600   976,773,119    41,963,520 Windows Recovery Environment (Windows)
/dev/sda6     719,112,192   772,360,191    53,248,000 BIOS Boot partition
/dev/sda7     772,360,192   788,744,191    16,384,000 Swap partition (Linux)
/dev/sda8     788,744,192   934,809,599   146,065,408 Data partition (Linux)

"blkid" output: ________________________________________________________________

Device           UUID                                   TYPE       LABEL

/dev/sda1        6E72-0711                              vfat       SYSTEM
/dev/sda2        E81603CE16039D26                       ntfs       Recovery
/dev/sda4        562606DF2606BFCB                       ntfs       OS
/dev/sda5        84D00996D0098F9A                       ntfs       Restore
/dev/sda6        625efb85-8980-43e5-9015-1d5a42c6a2b7   ext4       
/dev/sda7        9863ea20-b79d-40a2-a4c2-cbf85f672597   swap       
/dev/sda8        b18c5e29-0191-4a7b-a773-ba0d792c907f   ext4       
/dev/sr0                                                iso9660    sysrcd-3.8.1

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

Device           Mount_Point              Type       Options

/dev/sda6        /                        ext4       (rw,errors=remount-ro)
/dev/sda8        /home                    ext4       (rw)


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

Unknown BootLoader on sda1

00000000  eb 58 90 4d 53 44 4f 53  35 2e 30 00 02 02 fe 19  |.X.MSDOS5.0.....|
00000010  02 00 00 00 00 f8 00 00  3f 00 ff 00 00 08 00 00  |........?.......|
00000020  00 20 03 00 01 03 00 00  00 00 00 00 02 00 00 00  |. ..............|
00000030  01 00 06 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000040  80 01 29 11 07 72 6e 4e  4f 20 4e 41 4d 45 20 20  |..)..rnNO 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
 
Old 07-28-2015, 04:15 AM   #2
Keruskerfuerst
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As I see, you want to install the bootloader in the MBR of the boot disk.
To boot Ubuntu (better 64 Bit version, if your CPU can handle this), you have to select the MBR of the boot disk in the bios boot menu, opposed to Win 8.1, which boots the VFAT (UEFI) boot partition.
 
1 members found this post helpful.
Old 07-28-2015, 07:30 AM   #3
yancek
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Mixing a UEFI/GPT install with the old MBR type install almost always leads to this problem. You need to install both with the same method. Either install Grub to the MBR with the BIOS boot partition or install both UEFI with an EFI partition. You have both the BIOS boot partition and an efi partition but only an efi file for one system.

I see you have Grub Legacy which has not been the default bootloader for Ubuntu for several years??

Last edited by yancek; 07-28-2015 at 07:34 AM.
 
1 members found this post helpful.
Old 08-02-2015, 10:29 AM   #4
l33y
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Registered: Jan 2014
Location: Gulf Coast, USA
Distribution: Xubuntu
Posts: 50
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Original Poster
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Yancek and Keruskerfuerst, thank you for your assistance. This UEFI stuff has kicked my tail for over a year now, and I confess to not totally understanding it. You are right, it was installing Linux as MBR/BIOS. I spent most of yesterday troubleshooting this and was finally able to install Xubuntu 14.04, 64bit version. A couple of observations:

32 bit version loaded as BIOS, hence the legacy version of grub.
Erased the 32 bit version, loaded the 64 bit version, which also loaded as BIOS.
note these first two loads were done with CSM enabled;
Disabled CSM, then the computer would not recognize the DVD.
Enabled CSM, then rebooted with my external hard drive plugged in, then my UEFI firmware was able to give the option of booting from a CD/DVD player in either UEFI mode, or BIOS mode.
I was able to select install in UEFI mode, overwrote the linux partitions, and now I have a dual boot system. Mysterious to me.
 
  


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