Partial upgrade from Ubuntu 14.04 to 14.10

I was trying to upgrade from Ubuntu 14.04 to 14.10 but due to a brief wifi disconnect, at some point the upgrade failed.

Since everything was working fine and some packages were modified, I ran apt-get upgrade to update my packages.

When I logged in, the login screen said "Ubuntu 14.10" but when I check the Overview page in system settings, it shows "Ubuntu 14.04" Also, I am getting random errors like "You are not allowed to perform this action" when I try to change network settings or settings in the update manager.

Is there any way I can go back to 14.04 or finish my upgrade to 14.10? Or simply revert the changes that I did?

So, I ran apt-get dist-upgrade and here is the output that I got:

Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... The following packages were automatically installed and are no longer required:
  fonts-unfonts-core libdb5.3:i386 libgtkdatabox-0.9.2-0 libidl-common mpg123
Use 'apt-get autoremove' to remove them.
Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
Setting up brltty (5.0-2ubuntu3) ...
update-initramfs: deferring update (trigger activated)
update-rc.d: warning: start and stop actions are no longer supported; falling back to defaults
insserv: Service mountkernfs has to be enabled to start service brltty
insserv: exiting now!
update-rc.d: error: insserv rejected the script header
dpkg: error processing package brltty (--configure):
 subprocess installed post-installation script returned error exit status 1
Processing triggers for initramfs-tools (0.103ubuntu8) ...
update-initramfs: Generating /boot/initrd.img-3.13.0-52-generic
Errors were encountered while processing:
 brltty
E: Sub-process /usr/bin/dpkg returned an error code (1)

Edit: I just realized that I can't mount pendrives. (Ubuntu would give the "Not authorized to perform operation" error)

The problem, after doing some investigation turned out to be a problematic sources list. (can be found at /etc/apt/sources.list) where the version was set to trusty and not utopic. This, I think, was causing the machine to download the wrong updates. So this is what I did:

• changed all instances of trusty in that file to utopic


• removed the brltty package as it was causing trouble with the upgrade.


• ran sudo apt-get update followed by sudo apt-get upgrade and sudo apt-get dist-upgrade This installed the right version of the packages.


• Restarted the machine and now I have a nice 14.10 running on my machine.


• The kernel was not installed properly, so I removed the problematic version. Look at this question

And now magically, all the "You are not authorized to do ..." errors are gone. Everything seems to be working fine.