Further research seems to indicate to me that this is a known issue with XCB/Xlib since 2004.
http://osdir.com/ml/freedesktop.xcb/2004-03/msg00001.html "So I'm declaring Xlib/XCB usable, aside from one irritating bug that I haven't figured out how to track down yet (some apps sometimes hang until an event is recieved). It'd help a lot if people would try building freedesktop.org's Xlib with `configure --with-xcb`, and let me know whether it works for them as a drop-in replacement for normal Xlib." http://xcb.freedesktop.org/XCBCompletedTasks/ "17 Mar 2004 <...> Current known Xlib/XCB bugs: * Internal connections are broken, which I think means input methods won't work. * Apps sometimes hang until an event is received. * Last I checked, the display managers I tested crashed" http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&p=52983&sid=01795b3f1f48fc2ea7bd55870380772e "Non-technical/non-Linux people, feel free to skip this paragraph: For those who want to know, it's libX11's 1.1 release, which builds libX11 on top of XCB, the new low-level X library and protocol. There seems to be several deadlocks involved in waiting for responses from the X server." and finally http://bugs.freedesktop.org/show_bug.cgi?id=9528 ** Changed in: libxcb (Ubuntu) Importance: High => Critical ** Changed in: xfce4-session (Ubuntu) Status: New => Invalid ** Description changed: - XUbuntu 8.04, 2.6.26-rc3 + Ubuntu 8.04 - It is not reproducable (I don't know when it happens). But it happens often enough. + It is not reproducible (I don't know when it happens). But it happens often enough. dbus-launch can't be killed with SIGTERM (nor it dies when X session is killed, nor after Ctrl-Alt-Backspace) when it happens and seem to hang on some synchronization routine IIRC from the last time I tried to debug the issue. I installed dbgsyms this times and will try to debug dbus-launch next time it happens. BTW, isn't dbus-launch supposed to exit after dbus-daemon is started (for the user session)? ** Changed in: linux (Ubuntu) Status: New => Invalid -- dbus-launch freezes for unknown reason at session start https://bugs.launchpad.net/bugs/232364 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
