# Cannot apt –fix, potentially conflicting packages

## post by drustsmith on Jan 22, 2021

After a recent apt update on my lambda hardware I hit this issue. It looks like it may be a circular conflict between the ubuntu version of the drivers and the lambda version.

> The following packages have unmet dependencies:
>
> libnvidia-gl-460 : Breaks: libnvidia-gl-460:i386 (!= 460.32.03-0lambda0~20.04.1) but 460.32.03-0ubuntu0.20.04.1 is installed
>
> libnvidia-gl-460:i386 : Breaks: libnvidia-gl-460 (!= 460.32.03-0ubuntu0.20.04.1) but 460.32.03-0lambda0~20.04.1 is installed
>
>
> libnvidia-ifr1-460:i386 : Depends: libnvidia-gl-460:i386 (= 460.32.03-0lambda0~20.04.1) but 460.32.03-0ubuntu0.20.04.1 is installed

Then when I try doing apt --fix I get:

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

> dpkg: warning: downgrading libnvidia-gl-460:i386 from 460.32.03-0ubuntu0.20.04.1 to 460.32.03-0lambda0~20.04.1
>
> (Reading database … 330961 files and directories currently installed.)
>
> Preparing to unpack …/libnvidia-gl-460_460.32.03-0lambda0~20.04.1_i386.deb …
>
> Unpacking libnvidia-gl-460:i386 (460.32.03-0lambda0~20.04.1) over (460.32.03-0ubuntu0.20.04.1) …
>
> dpkg: error processing archive /var/cache/apt/archives/libnvidia-gl-460_460.32.03-0lambda0~20.04.1_i386.deb (–unpack):
>
> trying to overwrite shared ‘/usr/share/doc/libnvidia-gl-460/changelog.Debian.gz’, which is different from other instances of package libnvidia-gl-460:i386
>
> Errors were encountered while processing:
>
> /var/cache/apt/archives/libnvidia-gl-460_460.32.03-0lambda0~20.04.1_i386.deb
>
> E: Sub-process /usr/bin/dpkg returned an error code (1)

Then trying to fix that:

david:~$ sudo dpkg -P libnvidia-gl-460:i386

dpkg: dependency problems prevent removal of libnvidia-gl-460:i386:

libnvidia-ifr1-460:i386 depends on libnvidia-gl-460 (= 460.32.03-0lambda0~20.04.1).

libnvidia-gl-455:i386 depends on libnvidia-gl-460.

```
dpkg: error processing package libnvidia-gl-460:i386 (--purge):
 dependency problems - not removing
Errors were encountered while processing:
 libnvidia-gl-460:i386
```

Any advise would be excellent. I’m intending to just run the lambda versions.

## post by leonnowsden on Jan 27, 2021

Please try this: `sudo apt-get update && sudo apt-get dist-upgrade`. This should upgrade it properly then restart via: `sudo reboot` and it should work perfectly fine again.

## post by jeremy on Jan 28, 2021

Try this:

```bash

sudo apt install --fix-broken
```

Then reboot.

We have seen this issue crop up with other users recently, and are current looking into the potential causes.