** Description changed: - This message was appear when upgrade + [Impact] - ProblemType: Bug - DistroRelease: Ubuntu 14.04 - Package: ubuntu-release-upgrader-core 1:0.220.8 - ProcVersionSignature: Ubuntu 3.19.0-66.74~14.04.1-generic 3.19.8-ckt22 - Uname: Linux 3.19.0-66-generic x86_64 - NonfreeKernelModules: nvidia - ApportVersion: 2.14.1-0ubuntu3.21 - Architecture: amd64 - CrashDB: ubuntu - CurrentDesktop: Unity - Date: Wed Aug 10 18:41:24 2016 - InstallationDate: Installed on 2015-09-08 (336 days ago) - InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805) - PackageArchitecture: all - SourcePackage: ubuntu-release-upgrader - UpgradeStatus: Upgraded to trusty on 2016-08-10 (0 days ago) + * ROS releases are strict about the Ubuntu releases they support. These + days a given ROS release only supports one Ubuntu LTS. + + * Attempting to upgrade Ubuntu beyond that supported release at best + results in an unsupported situation, and at worst is known to break the + upgrade process as it's possible to get apt into an unrecoverable + situation. + + * The fix for this issue is to detect if ROS is installed and make sure + the user is aware that this may not succeed. + + [Test Case] + + * The dependency problems that lead to apt breakage is very deep and + hard to duplicate, but to paint with a broad brush: if a ROS package is + installed, extreme caution should be exercised when upgrading as it's + very likely that it's not supported. + + * To install ROS, follow the proper tutorial for your Ubuntu version, and install the "ros-base" metapackage: + - Xenial: https://wiki.ros.org/kinetic/Installation/Ubuntu + - Bionic: https://wiki.ros.org/melodic/Installation/Ubuntu + - Focal: https://wiki.ros.org/noetic/Installation/Ubuntu + + * Now use ubuntu-release-upgrader to upgrade to the next Ubuntu + release. Such a thing should not happen without prompting the user that + ROS is installed and that this may lead to problems. + + [Regression Potential] + + * Detecting that ROS is installed is done with a package name + heuristic, which isn't perfect. We look for a set of base ROS + dependencies using a pattern that is unlikely to clash with a non-ROS- + related package, but it's possible for this to result in a false + positive. Worst case, the user will be warned that ROS is installed when + in fact it isn't, but they'll still be able to continue the upgrade.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1611737 Title: Can't upgrade from a release if ros packages are installed from ROS servers To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1611737/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
