package linux-image-4.15.0-34-generic 4.15.0-34.37 failed to install/upgrade: run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1

[Joe Pedro]

unable to update to any newer kernel after upgrade. stuck on version linux-image-4.15.0-32-generic currently.

ProblemType: Package
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-34-generic 4.15.0-34.37
ProcVersionSignature: Ubuntu 4.15.0-32.35-generic 4.15.18
Uname: Linux 4.15.0-32-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: viral 4203 F.... pulseaudio
 /dev/snd/controlC0: viral 4203 F.... pulseaudio
Date: Wed Sep 19 22:56:45 2018
ErrorMessage: run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
HibernationDevice: RESUME=UUID=c358033e-93c3-4821-b8fd-cfe6862d5a91
InstallationDate: Installed on 2011-10-06 (2541 days ago)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
IwConfig:
 eth3 no wireless extensions.

 lo no wireless extensions.

 eth1 no wireless extensions.
MachineType: To be filled by O.E.M. To be filled by O.E.M.
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-32-generic root=UUID=1a3abf75-9125-457a-b20c-b45dc6774fd9 ro quiet splash security=selinux selinux=1
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
Python3Details: /usr/bin/python3.6, Python 3.6.5, python3-minimal, 3.6.5-3ubuntu1
PythonDetails: /usr/bin/python2.7, Python 2.7.15rc1, python-minimal, 2.7.15~rc1-1
RelatedPackageVersions: grub-pc 2.02-2ubuntu8.4
RfKill:
 0: hci0: Bluetooth
  Soft blocked: no
  Hard blocked: no
SourcePackage: initramfs-tools
Title: package linux-image-4.15.0-34-generic 4.15.0-34.37 failed to install/upgrade: run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/16/2012
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1604
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: SABERTOOTH 990FX
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1604:bd10/16/2012:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnASUSTeKCOMPUTERINC.:rnSABERTOOTH990FX:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: To be filled by O.E.M.

[Timo Aaltonen (tjaalton)]

Processing triggers for linux-image-4.15.0-33-generic (4.15.0-33.36) ...
/etc/kernel/postinst.d/initramfs-tools:
update-initramfs: Generating /boot/initrd.img-4.15.0-33-generic
cp: failed to restore the default file creation context: Invalid argument
E: /usr/share/initramfs-tools/hooks/kmod failed with return 1.
update-initramfs: failed for /boot/initrd.img-4.15.0-33-generic with 1.
run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return code 1
dpkg: error processing package linux-image-4.15.0-33-generic (--configure):
 installed linux-image-4.15.0-33-generic package post-installation script subprocess returned error exit status 1

[Ben Barrowes (barrowes)]

I was able to workaround this problem by following Mauricio Grueso's suggestion in bug #1776652:
https://bugs.launchpad.net/ubuntu/+source/initramfs-tools/+bug/1776652