** Description changed: + [Impact] + + Closing the GUI of update-manager tries to cancel the running + transaction then raises an Exception since cancellation fails. + + Users experience crashes after closing the GUI and many of them send + error reports about the issue while nothing can be done about those + transactions. + + The fix tries to close the transaction when it seems to be possible to + cancel it and ignores the exception when cancellation fails. + + + [Test Case] + + 1. Set up a fully updated system then downgrade a few packages and install autoremovable ones to create work for u-m: + $ sudo eatmydata apt install -y --allow-downgrades linux-headers-4.15.0-32 linux-headers-4.15.0-32-generic gnome-software=3.28.1-0ubuntu4 gnome-software-common=3.28.1-0ubuntu4 ; sudo /etc/kernel/postinst.d/apt-auto-removal ; sudo apt-mark auto linux-headers-4.15.0-32 linux-headers-4.15.0-32-generic + + 2. Start update-manager from the terminal and press "Install Now". + + 3. While the transaction is running close u-m's GUI with the (X). + The fixed u-m GUI just closes, while the not fixed ones show exceptions. With the fix the GUI closes, but the transaction is run to completion in the background. + + [Regression Potential] + + There is not a lot of room for regressions. As usual update-manager may fail to start due to syntax errors, but ignoring the exception can hardly cause any trouble. + Users may find it surprising that the transaction proceeds in the background, but this is still better than trowing the exception like before. + + [Other Info] + + * Anything else you think is useful to include + * Anticipate questions from users, SRU, +1 maintenance, security teams and the Technical Board + * and address these questions in advance + The Ubuntu Error Tracker has been receiving reports about a problem regarding update-manager. This problem was most recently seen with package version 1:18.10.4, the problem page at https://errors.ubuntu.com/problem/6d00ba06c8a67ead2e2021397da6006d84ddde5e contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports. If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1790670 Title: /usr/bin/update- manager:aptdaemon.errors.AptDaemonError(org.debian.apt):_convert_dbus_exception:cancel:__call__:call_blocking:_on_clicked:_deferable:_convert_dbus_exception To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/1790670/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
