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Error installing Ros Noetic in Ubuntu 20.04.1 LTS

Dear friends,

I'm having trouble installing ros on Ubuntu 20.04.1 LTS, my distro info:

 No LSB modules are available.
 Distributor ID:    Ubuntu
 Description:   Ubuntu 20.04.1 LTS
 Release:   20.04 Codename: focal

My error output after run install command sudo apt instal ros-noetic-desktop-full :

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 ros-noetic-desktop-full : Depends: ros-noetic-desktop but it is not going to be installed
                           Depends: ros-noetic-perception but it is not going to be installed
                           Depends: ros-noetic-simulators but it is not going to be installed
                           Depends: ros-noetic-urdf-sim-tutorial but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

I' setup my computer to accept software from packages.ros.org.

sudo sh -c 'echo "deb http://packages.ros.org/ros/ubuntu $(lsb_release -sc) main" > /etc/apt/sources.list.d/ros-latest.list'

And add the key:

sudo apt-key adv --keyserver 'hkp://keyserver.ubuntu.com:80' --recv-key C1CF6E31E6BADE8868B172B4F42ED6FBAB17C654

Could someone help me with the packages?

Asked by Diogo42 on 2020-11-24 12:02:37 UTC

Comments

Usually means there's some package that conflicts with these. There's another tool called aptitude that explains more about why this is happening. Mind posting the output of sudo aptitude install ros-noetic-desktop-full?

Asked by sloretz on 2020-11-24 12:05:38 UTC

This error is usually fixed via sudo apt install -f (with no other arguments). But pay close attention to the resolution apt finds. It may uninstall existing packages that you want to keep. But that would give a hint as to what the issue/conflict was.

Asked by chfritz on 2020-11-24 12:53:07 UTC

My aptitude output:

Leave the following dependencies unresolved:
357) cython3 recommends python3-dev
358) fluid recommends libfltk1.3-dev
359) libfltk1.3-dev recommends libgl1-mesa-dev | libgl-dev
360) libfltk1.3-dev recommends libglu1-mesa-dev | libglu-dev
361) libopenmpi-dev recommends libcoarrays-openmpi-dev
362) openmpi-bin recommends libopenmpi-dev
363) protobuf-compiler recommends libprotobuf-dev
364) sip-dev recommends python-sip-dev (>= 4.19.21+dfsg-1build1) | python3-s

Asked by Diogo42 on 2020-11-24 15:28:02 UTC

Maybe my problem in this package: libx11-dev : Depends: libx11-6 (= 2:1.6.9-2ubuntu1.1) but 2:1.6.12-1 is to be installed

Asked by Diogo42 on 2020-11-24 15:50:39 UTC

Same issue here on a fresh 20.04.2 install. It's probably fair to assume that the ROS install on this version of Ubuntu is broken and has been broken since at least November :-( If true, this isn't an ideal experience for new users. Should the wiki install page be updated until this is fixed?

Asked by pglombardo on 2021-02-19 11:44:55 UTC

After drilling down into the apt dependency tree I find "ros-noetic-rosconsole-bridge : Depends: libconsole-bridge0.4 but it is not installable". There is no apt package that matches "console-bridge" in 20.04.x/focal and this page seems to confirm that: https://index.ros.org/d/libconsole-bridge-dev/

Asked by pglombardo on 2021-02-19 11:48:29 UTC

Not sure if it could help but I just had the same issue while upgrading from Ubuntu 18.04 and Melodic to 20.04 and Noetic. I had the same output as you for the install of ros-noetic-desktop. Turned out I did not properly remove every existing packages of melodic; which I thought I did before upgrading Ubuntu versions.. After that the install of noetic desktop worked as usual normally. Maybe that can help someone.

Asked by Vincent_V on 2021-03-01 04:50:51 UTC

I too underwent the same process as Vincent_V and had the same error. In my case though all the packages of melodic were removed already. I tried sudo aptitude install ros-noetic-desktop-full but wasn't sure how to resolve the issue. So, I ran sudo apt upgrade and finally, the installation went through.

Asked by pranav.srini on 2021-05-15 23:01:24 UTC

Answers

As suggested by @sloretz, whom I first want to thank, I used the command line sudo aptitude install ros-noetic-desktop-full and thus according to its returned result, find the conflicting packages which were incorrectly upgraded in terms of the desirable python packages (in my case) as dependencies of the ros-noetic-desktop-full. Concretely, in my case, the "python3.8.5-1~20.04.2" is needed instead of the current incorrect "python3.8.9-1+bionic1". So the action I need to take for this problem is just to "downgrade" the current version of pyhton packages to the right one:

sudo apt install libpython3.8:amd64=3.8.5-1~20.04.2 libpython3.8-dev:amd64=3.8.5-1~20.04.2 libpython3.8-minimal:amd64=3.8.5-1~20.04.2 libpython3.8-stdlib:amd64=3.8.5-1~20.04.2 python3.8=3.8.5-1~20.04.2 python3.8-minimal=3.8.5-1~20.04.2

It is again to mention that the solution is specific to my case. However, in my opinion, it doesnot limit the generalization for such a problem when you try to find the conflicting packages.

Asked by xrk on 2021-04-03 08:19:20 UTC

Comments

You can find the conflicting packages / dependencies under "The following packages have unmet dependencies:"

Asked by xrk on 2021-04-03 08:24:37 UTC

Hi, were you able to solve this problem? I just installed a completely fresh Ubuntu 20.04 and started with the Noetic install manual. I have the same error message.

Asked by balint.tahi on 2021-06-07 05:39:25 UTC

Hey, I had the same exact problem and I managed to install with these instructions:

https://varhowto.com/install-ros-noetic-ubuntu-20-04/

I hope that it helps someone else as well!

Asked by Petro on 2021-04-20 05:25:55 UTC

Comments

Hey，I solved this problem in Ubuntu，just turn on the system updates in Software & Updates and try again.

Asked by Jsong on 2022-03-23 05:13:52 UTC

Comments

Adding the following source fixed the problem for me

sudo sh -c 'echo "deb http://packages.osrfoundation.org/gazebo/ubuntu-stable `lsb_release -cs` main" > /etc/apt/sources.list.d/gazebo-stable.list' wget https://packages.osrfoundation.org/gazebo.key -O - | sudo apt-key add - sudo apt-get update

For more details refer to the answer here

Asked by swrdfish on 2022-08-07 09:55:12 UTC

Comments