SUMMARY Error message: Preparing to unpack .../grub-theme-breeze_5.21.4-0xneon+20.04+focal+release+build24_amd64.deb ... Unpacking grub-theme-breeze (5.21.4-0xneon+20.04+focal+release+build24) over (5.21.3-0xneon+20.04+focal+build23) ... dpkg: error processing archive /var/cache/apt/archives/grub-theme-breeze_5.21.4-0xneon+20.04+focal+release+build24_amd64.deb (--unpack): unable to make backup link of './boot/grub/themes/breeze/progress_bar2_c.png' before installing new version: Operation not permitted dpkg-deb: error: paste subprocess was killed by signal (Broken pipe) Errors were encountered while processing: /var/cache/apt/archives/grub-theme-breeze_5.21.4-0xneon+20.04+focal+release+build24_amd64.deb ZSys is adding automatic system snapshot to GRUB menu E: Sub-process /usr/bin/dpkg returned an error code (1) STEPS TO REPRODUCE 1. Have KDE neon on ZFS filesystem with grub-theme-breeze in a version older than 5.21.4 2. apt update && apt dist-upgrade OBSERVED RESULT Package fails to install. EXPECTED RESULT Package can be installed without error. SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: KDE Neon 5.21 User Edition KDE Plasma Version: 5.21.4 KDE Frameworks Version: 5.80.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION It's possible to manually copy the images from an extracted package to the target folder, but installing the package fails. Likely also related to this: https://bugs.launchpad.net/ubuntu/+source/lubuntu-artwork/+bug/1873008 Related entries from /etc/fstab: # /boot/efi was on /dev/nvme0n1p3 during installation UUID=(some uuid) /boot/efi vfat umask=0022,fmask=0022,dmask=0022 0 1 /boot/efi/grub /boot/grub none defaults,bind 0
unable to make backup link of './boot/grub/themes/breeze/progress_bar2_c.png' before installing new version: Operation not permitted Yes, this is a downstream packaging isusue: https://bugs.launchpad.net/ubuntu/+source/lubuntu-artwork/+bug/1873008. There's nothing we can do in KDE about that, sadly.