I'm a user of the "Application Menu in Window Decoration" feature as described by Martin Gräßlin here: http://blog.martin-graesslin.com/blog/2013/01/4-10-feature-presentation-application-menu-in-window-decoration/. I recently updated Kubuntu from version 13.10 (Saucy Salamander) to 14.04 (Trusty Tahr), which in turn updated KDE Telepathy to version 0.8.0. From that moment onwards, whenever I try to open a chat window it "freezes". That is, the window appears, the toolbar is visible but the contents remain "empty". After a while, the following error appears: "org.freedesktop.Telepathy.Error.NotAvailable: Handler no longer available." After that, the window contents are visible but the window remains "frozen". Typing is not possible. I may be wrong but other "requests" seem to be blocked until the error message appear. For example, trying to close the KDE session or trying to capture a screnshot by pressing the corresponding hotkey while the chat window is unresponsive does nothing but the request seems postponed. Once the error message appear, those requests happen at once. Reproducible: Always Steps to Reproduce: 1. Ensure the "Application Menu in Window Decoration" feature is enabled in System Settings. 2. Open a chat window by double-clicking a contact in KDE Telepathy. Actual Results: An unresponsive chat window is shown. Expected Results: A chat window which actually works should be shown. The symptons seems identical to those described in Bug #332099 (https://bugs.kde.org/show_bug.cgi?id=332099). The screenshot of the chat window seems identical to the ones I'm getting. I've successfully reproduced the bug in a guest session in Kubuntu. As far as I know, guest sessions use the default configuration so I believe it has nothing to do with my particular configuration other than the application menu in window decoration.
Created attachment 86249 [details] First stage of unresponsive chat window
Created attachment 86250 [details] Second stage of unresponsive window This is how the window looks after the error message has been shown.
You are correct. I explain the cause here if you're interested. https://plus.google.com/101211744280964358210/posts/UYkWKz884S3 Either way it's not our fault. I wrote a patch here: https://git.reviewboard.kde.org/r/117746/
Thanks for the incredibly prompt response, David. Do you happen to know if this is Kubuntu specific? If so, perhaps someone should notify them.