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:

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.