Thank you for taking the time to report this bug and helping to make Ubuntu better. The relevant dpkg terminal log says:
update-initramfs: Generating /boot/initrd.img-4.4.0-21-generic cp: cannot stat '/etc/modprobe.d/nvidia-graphics-drivers.conf': No such file or directory E: /usr/share/initramfs-tools/hooks/copy-nvidia-options failed with return 1. Since this was a transient error, let's close this bug. ** Changed in: initramfs-tools (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to initramfs-tools in Ubuntu. https://bugs.launchpad.net/bugs/1576524 Title: package initramfs-tools 0.122ubuntu8 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 Status in initramfs-tools package in Ubuntu: Invalid Bug description: It might have to do with installing nvidia-364 from the graphics diver PPA. ProblemType: Package DistroRelease: Ubuntu 16.04 Package: initramfs-tools 0.122ubuntu8 ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6 Uname: Linux 4.4.0-21-generic x86_64 ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 Date: Thu Apr 28 22:59:47 2016 ErrorMessage: subprocess installed post-installation script returned error exit status 1 InstallationDate: Installed on 2016-04-28 (0 days ago) InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1) PackageArchitecture: all RelatedPackageVersions: dpkg 1.18.4ubuntu1 apt 1.2.10ubuntu1 SourcePackage: initramfs-tools Title: package initramfs-tools 0.122ubuntu8 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1576524/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp