[Bug 1834250] Re: update-grub complains about non-existent drives (due to cardreader)

Wed Jun 1 12:16:35 UTC 2022

Hello Scott, or anyone else affected,

Accepted lvm2 into focal-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/lvm2/2.03.07-1ubuntu1.1 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
focal to verification-done-focal. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-focal. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: lvm2 (Ubuntu Focal)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-focal

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https://bugs.launchpad.net/bugs/1834250

Title:
  update-grub complains about non-existent drives (due to cardreader)

Status in lvm2 package in Ubuntu:
  Fix Released
Status in lvm2 source package in Focal:
  Fix Committed

Bug description:
  [Impact]

   * `update-grub` (actually `vgs`) complains about
     'No medium found' on systems with card readers
     that have no card in.

   * This may confuse users who aren't sure whether
     it means problems occurred with the bootloader,
     and concern their ability to safely boot again.

   * The workaround is to add a filter to LVM config,
     but this might be hard to find and error prone.
     (And not even seem relate to `update-grub` at
     all, specially on non-LVM storage layouts.)
     [See comment #16]

   * The fix replaces calls to `dev_open_readonly()`
     with `dev_open_readonly_quiet()` in scan path,
     where such errors are not a problem.

  [Test Plan]

   * Run `vgs` on a system with a card reader
     and check for 'No medium found' messages.

   * Run `strace -f -e openat vgs` to confirm
     system calls/error codes have no changes.

   * [See comment #20]

  [Where problems could occur]

   * The patch changes syscall error reporting on the
     'scan' path, so problems could occur when listing
     LVM resources in block devices (e.g., list volume
     groups with `vgs`).

   * There's little to no changes upstream on this area,
     and the change is present in Jammy; both help with
     a lower chance of regression.

  [Other Info]

   * `block-proposed-focal`: The upload is being staged
     as it's just a cosmetic change, but affects `lvm2`,
     which is present in so many systems, triggering a
     lot of upgrades/boot risk (in case something else
     broke and this upgrade could reveal it indirectly).

   * So, it will probably only be released once a more
     serious issue has to be fixed in `lvm2`.

   * Scope: Jammy has the fix, and Impish will EOL soon.

  [Original Bug Description]

  sudo update-grub

  Sourcing file `/etc/default/grub'
  Sourcing file `/etc/default/grub.d/init-select.cfg'
  Generating grub configuration file ...
    /dev/sdc: open failed: No medium found
    /dev/sdd: open failed: No medium found
    /dev/sde: open failed: No medium found
    /dev/sdf: open failed: No medium found
    /dev/sdc: open failed: No medium found
    /dev/sdd: open failed: No medium found
    /dev/sde: open failed: No medium found
    /dev/sdf: open failed: No medium found
    /dev/sdc: open failed: No medium found
    /dev/sdd: open failed: No medium found
    /dev/sde: open failed: No medium found
    /dev/sdf: open failed: No medium found
    /dev/sdc: open failed: No medium found
    /dev/sdd: open failed: No medium found
    /dev/sde: open failed: No medium found
    /dev/sdf: open failed: No medium found
    /dev/sdc: open failed: No medium found
    /dev/sdd: open failed: No medium found
    /dev/sde: open failed: No medium found
    /dev/sdf: open failed: No medium found
    /dev/sdc: open failed: No medium found
    /dev/sdd: open failed: No medium found
    /dev/sde: open failed: No medium found
    /dev/sdf: open failed: No medium found
    /dev/sdc: open failed: No medium found
    /dev/sdd: open failed: No medium found
    /dev/sde: open failed: No medium found
    /dev/sdf: open failed: No medium found
    /dev/sdc: open failed: No medium found
    /dev/sdd: open failed: No medium found
    /dev/sde: open failed: No medium found
    /dev/sdf: open failed: No medium found
    /dev/sdc: open failed: No medium found
    /dev/sdd: open failed: No medium found
    /dev/sde: open failed: No medium found
    /dev/sdf: open failed: No medium found
    /dev/sdc: open failed: No medium found
    /dev/sdd: open failed: No medium found
    /dev/sde: open failed: No medium found
    /dev/sdf: open failed: No medium found
  Found linux image: /boot/vmlinuz-5.0.0-17-generic
  Found initrd image: /boot/initrd.img-5.0.0-17-generic
  Found linux image: /boot/vmlinuz-5.0.0-16-generic
  Found initrd image: /boot/initrd.img-5.0.0-16-generic
    /dev/sdc: open failed: No medium found
    /dev/sdd: open failed: No medium found
    /dev/sde: open failed: No medium found
    /dev/sdf: open failed: No medium found
    /dev/sdc: open failed: No medium found
    /dev/sdd: open failed: No medium found
    /dev/sde: open failed: No medium found
    /dev/sdf: open failed: No medium found
    /dev/sdc: open failed: No medium found
    /dev/sdd: open failed: No medium found
    /dev/sde: open failed: No medium found
    /dev/sdf: open failed: No medium found
  Adding boot menu entry for EFI firmware configuration
  done

  --

  lsblk

  NAME                     MAJ:MIN RM  SIZE RO TYPE  MOUNTPOINT
  sda                        8:0    0  3.7T  0 disk
  ├─sda1                     8:1    0  512M  0 part  /boot/efi
  ├─sda2                     8:2    0  732M  0 part  /boot
  └─sda3                     8:3    0  3.7T  0 part
    └─sda3_crypt           253:0    0  3.7T  0 crypt
      ├─kubuntu--vg-swap_1 253:1    0  976M  0 lvm   [SWAP]
      └─kubuntu--vg-root   253:2    0  3.7T  0 lvm   /
  sdb                        8:16   0  3.7T  0 disk
  └─sdb1                     8:17   0  3.7T  0 part
  sdg                        8:96   0  7.3T  0 disk
  └─sdg1                     8:97   0  7.3T  0 part  /media/scott/8TB Ext Drive
  sr0                       11:0    1 15.7G  0 rom

  --

  cat /etc/default/grub

  GRUB_DEFAULT=0
  GRUB_TIMEOUT=10
  GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
  GRUB_CMDLINE_LINUX_DEFAULT="intel_iommu=on"
  GRUB_CMDLINE_LINUX=""

  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: grub2-common 2.02+dfsg1-12ubuntu3
  ProcVersionSignature: Ubuntu 5.0.0-17.18-generic 5.0.8
  Uname: Linux 5.0.0-17-generic x86_64
  NonfreeKernelModules: nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu3
  Architecture: amd64
  CurrentDesktop: KDE
  Date: Tue Jun 25 15:05:29 2019
  InstallationDate: Installed on 2019-06-14 (10 days ago)
  InstallationMedia: Kubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190614)
  SourcePackage: grub2
  UpgradeStatus: No upgrade log present (probably fresh install)

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