I just upgraded from 14.04 to 16.04. This wasn't easy, probably because I had a lot of tweaks on my machine (updated packages not installed from "official" sources). It wouldn't boot, I thought at first it was a graphics card problem ("Radeon init error"), but eventually made it boot by downloading (on other machine)
libstdc++6 then installing with
dpkg -i, using Grub root shell
(similar problem as the one here).
I am now able to boot, have the desktop session. Fine.
Now the problem: I have a heavy package dependency problem, all the
apt-get commands will fail. Consider this:
$ sudo apt-get check Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these. The following packages have unmet dependencies: libstdc++-5-dev : Depends: libstdc++6 (>= 5.5.0-12ubuntu1~14.04) but 5.4.0-6ubuntu1~16.04.10 is installed libstdc++6 : Depends: gcc-5-base (= 5.4.0-6ubuntu1~16.04.10) but 5.5.0-12ubuntu1~14.04 is installed Breaks: libogre-1.8.0 (<= 1.8.1+dfsg-0ubuntu5) but 1.8.1+dfsg-0ubuntu3 is installed libstdc++6:i386 : Depends: gcc-5-base:i386 (= 5.4.0-6ubuntu1~16.04.10) but 5.5.0-12ubuntu1~14.04 is installed Breaks: libogre-1.8.0 (<= 1.8.1+dfsg-0ubuntu5) but 1.8.1+dfsg-0ubuntu3 is installed E: Unmet dependencies. Try using -f.
The given advice (
apt-get -f install) does nothing.
As you can see, what is strange is that there seems to be a mixup of packages from 14.04 and 16.04:
libstdc++-5-devdepends on the 14.04 version of
libstdc++6, and I have of course the 16.04 version intalled.
libstdc++6depends on a 16.04 package (
gcc-5-base) but I seem to still have a 14.04 version!!!
I tried to reinstall the 3 packages with:
sudo apt-get -f install <pkgname> --reinstall
I tried to remove libstdc++-5-dev with:
sudo apt-get -f remove libstdc++-5-dev
=> it asks for unmet dependencies of several other packages. If I remove them one by one, I end up at the same point.
I also tried a lot of other things but basically end up at the same point.
$ lsb_release -ir Distributor ID: Ubuntu Release: 16.04 $ uname -m x86_64
Question: how do I get myself out of this dependency problem?