Dtyjlui

I have searched the whole internet including reading everything on google/askubuntu/all ubuntu communities), tried all the possible solution and still didn't figure it out (but I am not google so my indexing and searching algorithm skills might not be that good)

anyways to the point. I am trying to run apt-get update and then apt-get upgrade.

I get the following error:

Reading package lists... Done

Building dependency tree       

Reading state information... Done

You might want to run 'apt --fix-broken install' to correct these.

The following packages have unmet dependencies:

 libnvidia-ifr1-390 : Depends: libnvidia-gl-390 but it is not installed

 libnvidia-ifr1-390:i386 : Depends: libnvidia-gl-390:i386 but it is not installed

 nvidia-driver-390 : Depends: libnvidia-gl-390 (= 390.87-0ubuntu0~gpu18.04.1) but it is not installed

                     Recommends: libnvidia-gl-390:i386 (= 390.87-0ubuntu0~gpu18.04.1)

E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).

then i ran apt --fix-broken install .. and got these results

Reading package lists... Done

Building dependency tree       

Reading state information... Done

Correcting dependencies... Done

The following additional packages will be installed:

  libnvidia-gl-390 libnvidia-gl-390:i386

The following NEW packages will be installed:

  libnvidia-gl-390 libnvidia-gl-390:i386

0 upgraded, 2 newly installed, 0 to remove and 9 not upgraded.

4 not fully installed or removed.

Need to get 0 B/29.1 MB of archives.

After this operation, 147 MB of additional disk space will be used.

Do you want to continue? [Y/n] y

(Reading database ... 298882 files and directories currently installed.)

Preparing to unpack .../libnvidia-gl-390_390.87-0ubuntu0~gpu18.04.1_i386.deb ...

diversion of /usr/lib/i386-linux-gnu/libGL.so.1 to /usr/lib/i386-linux-gnu/libGL.so.1.distrib by nvidia-340

dpkg-divert: error: mismatch on package

  when removing 'diversion of /usr/lib/i386-linux-gnu/libGL.so.1 by libnvidia-gl-390'

  found 'diversion of /usr/lib/i386-linux-gnu/libGL.so.1 to /usr/lib/i386-linux-gnu/libGL.so.1.distrib by nvidia-340'

dpkg: error processing archive /var/cache/apt/archives/libnvidia-gl-390_390.87-0ubuntu0~gpu18.04.1_i386.deb (--unpack):

 new libnvidia-gl-390:i386 package pre-installation script subprocess returned error exit status 2

Preparing to unpack .../libnvidia-gl-390_390.87-0ubuntu0~gpu18.04.1_amd64.deb ...

diversion of /usr/lib/x86_64-linux-gnu/libGL.so.1 to /usr/lib/x86_64-linux-gnu/libGL.so.1.distrib by nvidia-340

dpkg-divert: error: mismatch on package

  when removing 'diversion of /usr/lib/x86_64-linux-gnu/libGL.so.1 by libnvidia-gl-390'

  found 'diversion of /usr/lib/x86_64-linux-gnu/libGL.so.1 to /usr/lib/x86_64-linux-gnu/libGL.so.1.distrib by nvidia-340'

dpkg: error processing archive /var/cache/apt/archives/libnvidia-gl-390_390.87-0ubuntu0~gpu18.04.1_amd64.deb (--unpack):

 new libnvidia-gl-390:amd64 package pre-installation script subprocess returned error exit status 2

Errors were encountered while processing:

 /var/cache/apt/archives/libnvidia-gl-390_390.87-0ubuntu0~gpu18.04.1_i386.deb

 /var/cache/apt/archives/libnvidia-gl-390_390.87-0ubuntu0~gpu18.04.1_amd64.deb

E: Sub-process /usr/bin/dpkg returned an error code (1)

i tried all the tricks like apt clean/remove/dist upgrade/whatever apt i found on the net without luck.

any help is really appricated.

I got the same error sometime back and if fixed it using a package named aptitude.

Run this sudo apt install aptitude
Then run sudo aptitude upgrade

It will give you possible solutions ignore the first and use the second.

Hope this will work for you too. 😊