Package: os-prober Version: 1.73 Severity: important While purging an old kernel from my stretch machine today I saw a lot of errors being output at the end when the Grub config was being updated:
Generating grub configuration file ... Found background image: /usr/share/images/desktop-base/desktop-grub.png Found linux image: /boot/vmlinuz-4.9.0-1-amd64 Found initrd image: /boot/initrd.img-4.9.0-1-amd64 device-mapper: remove ioctl on osprober-linux-sda2 failed: Device or resource busy Command failed WARNING: Not using lvmetad because duplicate PVs were found. WARNING: Use multipath or vgimportclone to resolve duplicate PVs? WARNING: After duplicates are resolved, run "pvscan --cache" to enable lvmetad. WARNING: PV cU7LfS-Hy15-lqhf-BBlB-b6HB-mxuG-Cij5Pu on /dev/mapper/osprober-linux-sda2 was already found on /dev/sda2. WARNING: PV cU7LfS-Hy15-lqhf-BBlB-b6HB-mxuG-Cij5Pu prefers device /dev/sda2 because device is used by LV. (Warnings repeated many times) lvm continued to be unhappy after the "apt purge" had finished until I did a "dmsetup remove osprober-linux-sda2". -- System Information: Debian Release: 9.0 APT prefers testing APT policy: (900, 'testing') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 4.9.0-1-amd64 (SMP w/8 CPU cores) Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages os-prober depends on: ii dmsetup 2:1.02.137-1 ii grub-common 2.02~beta3-3 ii libc6 2.24-8 os-prober recommends no packages. os-prober suggests no packages. -- no debconf information