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This is the error message I keep getting when trying to install the nvidia driver, libnvidia-gl-390_390.87.Can somebody help me resolve this issue? Please be aware that I am ubuntu challenged.

(Reading database ... 210321 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

Errors were encountered while processing:

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

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

A package failed to install.  Trying to recover:

dpkg: dependency problems prevent configuration of nvidia-driver-390:

 nvidia-driver-390 depends on libnvidia-gl-390 (= 390.87-0ubuntu0~gpu18.04.1); however:

  Package libnvidia-gl-390:i386 is not installed.



dpkg: error processing package nvidia-driver-390 (--configure):

 dependency problems - leaving unconfigured

dpkg: dependency problems prevent configuration of libnvidia-ifr1-390:i386:

 libnvidia-ifr1-390:i386 depends on libnvidia-gl-390; however:

  Package libnvidia-gl-390:i386 is not installed.



dpkg: error processing package libnvidia-ifr1-390:i386 (--configure):

 dependency problems - leaving unconfigured

Processing triggers for libc-bin (2.27-3ubuntu1) ...

/sbin/ldconfig.real: Warning: ignoring configuration file that cannot be opened: /etc/ld.so.conf.d/x86_64-linux-gnu_EGL.conf: No such file or directory

/sbin/ldconfig.real: Warning: ignoring configuration file that cannot be opened: /etc/ld.so.conf.d/x86_64-linux-gnu_GL.conf: No such file or directory

Errors were encountered while processing:

 nvidia-driver-390

 libnvidia-ifr1-390:i386

The output says that libnvidia-gl-390:i386 is not installed and it looks like libnvidia-gl-390:i386 needs to be installed to fix the issue. Run the following commands and please post any errors:

sudo apt update

sudo apt install --reinstall libnvidia-gl-390:i386

sudo apt -f install

sudo dpkg --configure -a

If you get an error, please post the error.

OK... I found that someone else was having the same problem I am on the ubuntu forums.

I tried this suggestion in terminal...

LC_MESSAGES=C dpkg-divert --list 'nvidia-340' | sed -nre 's/^diversion of (.) to ./1/p' | xargs -rd'n' -n1 -- sudo dpkg-divert --remove
sudo apt --fix-broken install

After which I ran sudo apt --fix broken install

Then ran sudo apt upgrade

This worked for me.
Thanks for your help