Public bug reported:

Once grub chooses what to boot to, an error shows up and will sit on the
screen for approx. 5 seconds

"Error: diskfilter writes are not supported.
Press any key to continue..."

>From what I understand, this error is related to raid partitions, and I
have two of them (md0, md1). Both partitions are used (root and swap).
Raid is assembled with mdadm and are raid0

This error message started appearing right after grub2 was updated on
01/27/2014.

System:    Kernel: 3.13.0-5-generic x86_64 (64 bit) Desktop: KDE 4.11.5 Distro: 
Ubuntu 14.04 trusty
Drives:    HDD Total Size: 1064.2GB (10.9% used)
        1: id: /dev/sda model: SanDisk_SDSSDRC0 size: 32.0GB
        2: id: /dev/sdb model: SanDisk_SDSSDRC0 size: 32.0GB
        3: id: /dev/sdc model: ST31000528AS size: 1000.2GB
RAID:      Device-1: /dev/md1 - active raid: 0 components: online: sdb2 sda3 
(swap)       Device-2: /dev/md0 - active raid: 0 components: online: sdb1 sda1 
( / )
Grub2:    grub-efi-amd64 version 2.02~beta2-5

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: grub-efi-amd64 2.02~beta2-5
ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0
Uname: Linux 3.13.0-5-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.13.2-0ubuntu2
Architecture: amd64
CurrentDesktop: KDE
Date: Wed Jan 29 17:37:59 2014
SourcePackage: grub2
UpgradeStatus: Upgraded to trusty on 2014-01-23 (6 days ago)

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

** Description changed:

  Once grub chooses what to boot to, an error shows up and will sit on the
  screen for approx. 5 seconds
  
  "Error: diskfilter writes are not supported.
  Press any key to continue..."
  
  From what I understand, this error is related to raid partitions, and I
  have two of them (md0, md1). Both partitions are used (root and swap).
  Raid is assembled with mdadm and are raid0
  
  This error message started appearing right after grub2 was updated on
  01/27/2014.
  
  System:    Kernel: 3.13.0-5-generic x86_64 (64 bit) Desktop: KDE 4.11.5 
Distro: Ubuntu 14.04 trusty
- Drives:    HDD Total Size: 1064.2GB (10.9% used) 
-                  1: id: /dev/sda model: SanDisk_SDSSDRC0 size: 32.0GB 
-                  2: id: /dev/sdb model: SanDisk_SDSSDRC0 size: 32.0GB 
-                  3: id: /dev/sdc model: ST31000528AS size: 1000.2GB
+ Drives:    HDD Total Size: 1064.2GB (10.9% used)
+            1: id: /dev/sda model: SanDisk_SDSSDRC0 size: 32.0GB
+            2: id: /dev/sdb model: SanDisk_SDSSDRC0 size: 32.0GB
+            3: id: /dev/sdc model: ST31000528AS size: 1000.2GB
  RAID:      Device-1: /dev/md1 - active raid: 0 components: online: sdb2 sda3 
(swap)
-                 Device-2: /dev/md0 - active raid: 0 components: online: sdb1 
sda1 ( / )
+            Device-2: /dev/md0 - active raid: 0 components: online: sdb1 sda1 
( / )
  Grub2:    grub-efi-amd64 version 2.02~beta2-5
  
  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: grub-efi-amd64 2.02~beta2-5
  ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0
  Uname: Linux 3.13.0-5-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.13.2-0ubuntu2
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Wed Jan 29 17:37:59 2014
  SourcePackage: grub2
  UpgradeStatus: Upgraded to trusty on 2014-01-23 (6 days ago)

** Description changed:

  Once grub chooses what to boot to, an error shows up and will sit on the
  screen for approx. 5 seconds
  
  "Error: diskfilter writes are not supported.
  Press any key to continue..."
  
  From what I understand, this error is related to raid partitions, and I
  have two of them (md0, md1). Both partitions are used (root and swap).
  Raid is assembled with mdadm and are raid0
  
  This error message started appearing right after grub2 was updated on
  01/27/2014.
  
  System:    Kernel: 3.13.0-5-generic x86_64 (64 bit) Desktop: KDE 4.11.5 
Distro: Ubuntu 14.04 trusty
  Drives:    HDD Total Size: 1064.2GB (10.9% used)
-            1: id: /dev/sda model: SanDisk_SDSSDRC0 size: 32.0GB
-            2: id: /dev/sdb model: SanDisk_SDSSDRC0 size: 32.0GB
-            3: id: /dev/sdc model: ST31000528AS size: 1000.2GB
- RAID:      Device-1: /dev/md1 - active raid: 0 components: online: sdb2 sda3 
(swap)
-            Device-2: /dev/md0 - active raid: 0 components: online: sdb1 sda1 
( / )
+         1: id: /dev/sda model: SanDisk_SDSSDRC0 size: 32.0GB
+         2: id: /dev/sdb model: SanDisk_SDSSDRC0 size: 32.0GB
+         3: id: /dev/sdc model: ST31000528AS size: 1000.2GB
+ RAID:      Device-1: /dev/md1 - active raid: 0 components: online: sdb2 sda3 
(swap)         Device-2: /dev/md0 - active raid: 0 components: online: sdb1 
sda1 ( / )
  Grub2:    grub-efi-amd64 version 2.02~beta2-5
  
  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: grub-efi-amd64 2.02~beta2-5
  ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0
  Uname: Linux 3.13.0-5-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.13.2-0ubuntu2
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Wed Jan 29 17:37:59 2014
  SourcePackage: grub2
  UpgradeStatus: Upgraded to trusty on 2014-01-23 (6 days ago)

** Description changed:

  Once grub chooses what to boot to, an error shows up and will sit on the
  screen for approx. 5 seconds
  
  "Error: diskfilter writes are not supported.
  Press any key to continue..."
  
  From what I understand, this error is related to raid partitions, and I
  have two of them (md0, md1). Both partitions are used (root and swap).
  Raid is assembled with mdadm and are raid0
  
  This error message started appearing right after grub2 was updated on
  01/27/2014.
  
  System:    Kernel: 3.13.0-5-generic x86_64 (64 bit) Desktop: KDE 4.11.5 
Distro: Ubuntu 14.04 trusty
  Drives:    HDD Total Size: 1064.2GB (10.9% used)
          1: id: /dev/sda model: SanDisk_SDSSDRC0 size: 32.0GB
          2: id: /dev/sdb model: SanDisk_SDSSDRC0 size: 32.0GB
          3: id: /dev/sdc model: ST31000528AS size: 1000.2GB
- RAID:      Device-1: /dev/md1 - active raid: 0 components: online: sdb2 sda3 
(swap)         Device-2: /dev/md0 - active raid: 0 components: online: sdb1 
sda1 ( / )
+ RAID:      Device-1: /dev/md1 - active raid: 0 components: online: sdb2 sda3 
(swap)       Device-2: /dev/md0 - active raid: 0 components: online: sdb1 sda1 
( / )
  Grub2:    grub-efi-amd64 version 2.02~beta2-5
  
  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: grub-efi-amd64 2.02~beta2-5
  ProcVersionSignature: Ubuntu 3.13.0-5.20-generic 3.13.0
  Uname: Linux 3.13.0-5-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.13.2-0ubuntu2
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Wed Jan 29 17:37:59 2014
  SourcePackage: grub2
  UpgradeStatus: Upgraded to trusty on 2014-01-23 (6 days ago)

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https://bugs.launchpad.net/bugs/1274320

Title:
  Error after boot menu

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