LL2 not booting if one extended partition is formatted to FAT 32

[arunp]

Dear gold_finger,

I am using a Dell Vostro 3400 Laptop, Every thing is working fine with this as the same laptop works fine when i boot with windows and also LL configured as i posted in my reply 24th Aug 14, this reply also i am typing with LL booted and from Firefox browser in the below configuration

Code:

arunp@arunp-Vostro-3400:~$ sudo mount /dev/sdb1 /mnt
[sudo] password for arunp:
arunp@arunp-Vostro-3400:~$ cat /mnt/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).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sdb1 during installation
UUID=c4d3ddc8-fde0-4de3-91c1-e4ea48250115 /               ext4    errors=remount-ro 0       1
# /mnt/Windows was on /dev/sdb6 during installation
UUID=2555-2887  /mnt/Windows    vfat    utf8,umask=007,gid=46 0       1
# swap was on /dev/sdb5 during installation
UUID=f943611f-2a44-4f89-9b69-f840156d1c80 none            swap    sw              0       0
arunp@arunp-Vostro-3400:~$ lsblk
NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0 232.9G  0 disk
├─sda1   8:1    0 125.5M  0 part
├─sda2   8:2    0  12.2G  0 part
├─sda3   8:3    0 102.9G  0 part
├─sda4   8:4    0     1K  0 part
└─sda5   8:5    0 117.7G  0 part
sdb      8:16   0 465.8G  0 disk
├─sdb1   8:17   0 119.2G  0 part /
├─sdb2   8:18   0     1K  0 part
├─sdb5   8:21   0   7.5G  0 part [SWAP]
└─sdb6   8:22   0 339.1G  0 part
sr0     11:0    1  1024M  0 rom 
arunp@arunp-Vostro-3400:~$ sudo blkid -c /dev/null
/dev/sda1: SEC_TYPE="msdos" LABEL="DellUtility" UUID="07DB-011B" TYPE="vfat"
/dev/sda2: LABEL="RECOVERY" UUID="663EC66B3EC633B9" TYPE="ntfs"
/dev/sda3: LABEL="OS" UUID="0E58C90F58C8F68D" TYPE="ntfs"
/dev/sda5: UUID="30D748C43DA76362" TYPE="ntfs"
/dev/sdb1: UUID="c4d3ddc8-fde0-4de3-91c1-e4ea48250115" TYPE="ext4"
/dev/sdb5: UUID="f943611f-2a44-4f89-9b69-f840156d1c80" TYPE="swap"
/dev/sdb6: UUID="2555-2887" TYPE="vfat"
arunp@arunp-Vostro-3400:~$ sudo parted -l
Model: ATA WDC WD2500BEKT-7 (scsi)
Disk /dev/sda: 250GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End     Size    Type      File system  Flags
1      32.3kB  132MB   132MB   primary   fat16        diag
2      134MB   13.2GB  13.0GB  primary   ntfs         boot
3      13.2GB  124GB   110GB   primary   ntfs
4      124GB   250GB   126GB   extended
5      124GB   250GB   126GB   logical   ntfs


Model: Seagate Portable (scsi)
Disk /dev/sdb: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number  Start   End    Size    Type      File system     Flags
1      1049kB  128GB  128GB   primary   ext4            boot
2      128GB   500GB  372GB   extended
5      128GB   136GB  7999MB  logical   linux-swap(v1)
6      136GB   500GB  364GB   logical   fat32


arunp@arunp-Vostro-3400:~$

This issue happens only when an extended partition is configured with ext4 (sdb6)for /home along with an extended NTFS or FAT32 (sdb7)format for /Windows.

Is it possible anybody in your team can try installing in this configuration and figure out what's the issue.