Your solution worked for me..
Now i have upgraded to ubuntu 18.04.

Every thing is fine except one issue.
When i do:  sudo apt upgrade
I get errror for oem-kernel-cmdline
Please have a look at attached error snapshot

Plz help me resolve this error

On Mon, 18 May 2020, 21:05 Seth Forshee, <email address hidden>
wrote:

> Sorry, I misread something before. I thought you were running 16.04 now.
> You are running 14.04, so 3.13 is the correct kernel, it is not an "old"
> kernel for that release.
>
> Do you need to have casper installed? If not, the easiest thing to do
> would be to uninstall casper, then run the upgrade again.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1879077
>
> Title:
>   package linux-firmware 1.157.23 failed to install/upgrade: subprocess
>   installed post-installation script returned error exit status 1
>
> Status in casper package in Ubuntu:
>   New
> Status in linux-firmware package in Ubuntu:
>   New
>
> Bug description:
>   when I am trying to upgrade to 16.04 from 14  , i am getting below
>   error
>
>
>   Cmd : lsb_release -rd
>   Description:  Ubuntu 16.04.6 LTS
>   Release:      16.04
>
>
>   What I expected to happen -- Ubuntu upgrades to 16.04 with upgraded
> kernel 4.4
>
>   What happened instead : it upgraded to 16.04 but with old kernel only
> and my sound has stopped
>
>
>
>
>
>   Setting up initramfs-tools (0.122ubuntu8.16) ...
>   update-initramfs: deferring update (trigger activated)
>   Setting up linux-firmware (1.157.23) ...
>   update-initramfs: Generating /boot/initrd.img-3.13.0-38-generic
>   E: amd64-microcode: unsupported kernel version!
>   E: /usr/share/initramfs-tools/hooks/casper-memdisk failed with return 1.
>   update-initramfs: failed for /boot/initrd.img-3.13.0-38-generic with 1.
>   dpkg: error processing package linux-firmware (--configure):
>    subprocess installed post-installation script returned error exit
> status 1
>   Setting up linux-image-4.4.0-178-generic (4.4.0-178.208) ...
>   No apport report written because the error message indicates its a
> followup error from a previous failure.
>
>                                   No apport report written because the
> error message indicates its a followup error from a previous failure.
>
>  dpkg: dependency problems prevent configuration of linux-image-generic:
>    linux-image-generic depends on linux-firmware; however:
>     Package linux-firmware is not configured yet.
>
>   dpkg: error processing package linux-image-generic (--configure):
>    dependency problems - leaving unconfigured
>   dpkg: dependency problems prevent configuration of linux-generic:
>    linux-generic depends on linux-image-generic (= 4.4.0.178.186); however:
>     Package linux-image-generic is not configured yet.
>
>   dpkg: error processing package linux-generic (--configure):
>    dependency problems - leaving unconfigured
>   Processing triggers for initramfs-tools (0.122ubuntu8.16) ...
>   update-initramfs: Generating /boot/initrd.img-3.13.0-38-generic
>   E: amd64-microcode: unsupported kernel version!
>   E: /usr/share/initramfs-tools/hooks/casper-memdisk failed with return 1.
>   update-initramfs: failed for /boot/initrd.img-3.13.0-38-generic with 1.
>   dpkg: error processing package initramfs-tools (--configure):
>    subprocess installed post-installation script returned error exit
> status 1
>   No apport report written because MaxReports is reached already
>                                                                 Processing
> triggers for linux-image-4.4.0-178-generic (4.4.0-178.208) ...
>   /etc/kernel/postinst.d/dkms:
>    * dkms: running auto installation service for kernel 4.4.0-178-generic
>   Error!  The dkms.conf for this module includes a BUILD_EXCLUSIVE
> directive which
>   does not match this kernel/arch.  This indicates that it should not be
> built.
>      ...done.
>   /etc/kernel/postinst.d/initramfs-tools:
>   update-initramfs: Generating /boot/initrd.img-4.4.0-178-generic
>   E: /usr/share/initramfs-tools/hooks/casper-memdisk failed with return 1.
>   update-initramfs: failed for /boot/initrd.img-4.4.0-178-generic with 1.
>   run-parts: /etc/kernel/postinst.d/initramfs-tools exited with return
> code 1
>   dpkg: error processing package linux-image-4.4.0-178-generic
> (--configure):
>    subprocess installed post-installation script returned error exit
> status 1
>   No apport report written because MaxReports is reached already
>                                                                 Errors
> were encountered while processing:
>    linux-firmware
>    linux-image-generic
>    linux-generic
>    initramfs-tools
>    linux-image-4.4.0-178-generic
>   E: Sub-process /usr/bin/dpkg returned an error code (1)
>
>   ProblemType: Package
>   DistroRelease: Ubuntu 16.04
>   Package: linux-firmware 1.157.23
>   ProcVersionSignature: Ubuntu 3.13.0-38.65somerville1-generic 3.13.11.9
>   Uname: Linux 3.13.0-38-generic x86_64
>   ApportVersion: 2.20.1-0ubuntu2.23
>   Architecture: amd64
>   Date: Sat May 16 21:00:04 2020
>   Dependencies:
>
>   DistributionChannelDescriptor:
>    # This is a distribution channel descriptor
>    # For more information see
> http://wiki.ubuntu.com/DistributionChannelDescriptor
>    canonical-oem-somerville-trusty-amd64-20140620-0
>   ErrorMessage: subprocess installed post-installation script returned
> error exit status 1
>   InstallationDate: Installed on 2020-01-11 (126 days ago)
>   InstallationMedia: Ubuntu 14.04 "Trusty" - Build amd64 LIVE Binary
> 20140620-04:25
>   PackageArchitecture: all
>   RelatedPackageVersions:
>    dpkg 1.18.4ubuntu1.6
>    apt  1.2.32ubuntu0.1
>   SourcePackage: linux-firmware
>   Title: package linux-firmware 1.157.23 failed to install/upgrade:
> subprocess installed post-installation script returned error exit status 1
>   UpgradeStatus: Upgraded to xenial on 2020-05-16 (0 days ago)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/casper/+bug/1879077/+subscriptions
>