[Bug 1439512] [NEW] UEFI partition labeled incorrectly as "Linux filesystem"

[Nick B.]

Public bug reported:

On a fresh install of 14.10 server version the UEFI partition the
installer created (mounted on /boot/efi) is incorrectly set as 0x8300
Linux filesystem. The partition is actually a FAT partition and should
be 0x0c00.

mount says it's mounted as vfat:
/dev/sda1 on /boot/efi type vfat (rw)

but gdisk says it's a Linux partition
GPT fdisk (gdisk) version 0.8.8

Partition table scan:
  MBR: protective
  BSD: not present
  APM: not present
  GPT: present

Found valid GPT with protective MBR; using GPT.
Disk /dev/sda: 488397168 sectors, 232.9 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): D87C8175-4EB2-4DA4-A646-D4CD6A8B90AF
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 488397134
Partitions will be aligned on 2048-sector boundaries
Total free space is 2349 sectors (1.1 MiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048         1050623   512.0 MiB   8300  
   2         1050624       480270335   228.5 GiB   8300  
   3       480270336       488396799   3.9 GiB     8200

** Affects: debian-installer (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1439512

Title:
  UEFI partition labeled incorrectly as "Linux filesystem"

Status in debian-installer package in Ubuntu:
  New

Bug description:
  On a fresh install of 14.10 server version the UEFI partition the
  installer created (mounted on /boot/efi) is incorrectly set as 0x8300
  Linux filesystem. The partition is actually a FAT partition and should
  be 0x0c00.

  mount says it's mounted as vfat:
  /dev/sda1 on /boot/efi type vfat (rw)

  but gdisk says it's a Linux partition
  GPT fdisk (gdisk) version 0.8.8

  Partition table scan:
    MBR: protective
    BSD: not present
    APM: not present
    GPT: present

  Found valid GPT with protective MBR; using GPT.
  Disk /dev/sda: 488397168 sectors, 232.9 GiB
  Logical sector size: 512 bytes
  Disk identifier (GUID): D87C8175-4EB2-4DA4-A646-D4CD6A8B90AF
  Partition table holds up to 128 entries
  First usable sector is 34, last usable sector is 488397134
  Partitions will be aligned on 2048-sector boundaries
  Total free space is 2349 sectors (1.1 MiB)

  Number  Start (sector)    End (sector)  Size       Code  Name
     1            2048         1050623   512.0 MiB   8300  
     2         1050624       480270335   228.5 GiB   8300  
     3       480270336       488396799   3.9 GiB     8200

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