[Bug 1274320] Re: Error: diskfilter writes are not supported

[Jean-Mi]

You guys should be happy your system still boots. I just got that error (diskfilter writes are not supported) but grub exists immediately after, leaving my uefi with no other choice than booting another distro.
I had to spam press the pause key on my keyboard to get the error message before it disappears.
On my setup, the boot error occurs with openSuse installed on LVM2. The other distro is installed with a regular /boot (ext4) separate partition. Both are using grub. I could load both by calling their respective grubx64.efi from the ESP partition.
The last thing I remember having done on openSuse was to create a btrfs partition and tweaked /etc/fstab a little bit.
>From the other distro, I can read openSuse's files and everything looks fine. It's like the boot loader used to work and suddenly failed.
I'd love to remember what else I did since it worked. And I'd love to be able to boot openSuse again.

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

Title:
  Error: diskfilter writes are not supported

Status in “grub2” package in Ubuntu:
  Confirmed

Bug description:
  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)

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