Just a heads up: I'm seeing exactly the same behavior on OpenSUSE LEAP 15.2
This happens with Xfce4 desktop. It seems to be a rare bug; no one has hard about this when I asked on the mailing list. I did some debugging of keepassxc (since it's a relatively small app). Installed some debug packages, then "gdb keypassxc", wait 5 seconds until it stops printing "[New Thread 0x7fffe945b700 (LWP 18090)]", then Ctrl+C to get the stack traces. "info threads" to see which threads there are. "thread " + id to switch between them. The app hangs for 25 seconds when I try to start it which matches this timeout: __GI___poll (fds=0x555555f994d0, nfds=1, timeout=25000) at ../sysdeps/unix/sysv/linux/poll.c:29 Googling returned this analysis: https://freefilesync.org/forum/viewtopic.php?t=6704 The stack traces look very similar: Threads hanging in __lll_lock_wait and __GI___poll called from ibus_bus_new_async_client and g_simple_async_result_get_type respectively. In the mean time, I've found more apps with the same symptom: - qmmp - qtconfig ("Qt 4 settings" in the Xfce settings dialog.) I'm wondering about this line in the stack trace: /usr/lib64/qt5/plugins/styles/libqgtk2style.so Maybe there is a bug in the Qt style which I'm using. Stack frame 45 says style is "QGtk2Theme::themeHint(QPlatformTheme::ThemeHint) const::{lambda()#1}::operator()() const::qstring_literal" which would match the setting in the "Qt 4 settings" dialog but I'm using Qt5. Or is the dialog for both? -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to dbus in Ubuntu. https://bugs.launchpad.net/bugs/1852016 Title: Applications delayed on launch Status in dbus package in Ubuntu: Confirmed Bug description: Hello, i am unsure if this is really a problem with dbus but my first research showed it could be related to dbus. 1.) No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 19.10 Release: 19.10 Codename: eoan Ubuntu Budgie on T460 with 256GB SSD and 16GB RAM 2.) dbus: Installed: 1.12.14-1ubuntu2 Candidate: 1.12.14-1ubuntu2 Version table: *** 1.12.14-1ubuntu2 500 500 http://de.archive.ubuntu.com/ubuntu eoan/main amd64 Packages 100 /var/lib/dpkg/status 3.) I've expected just "normal" loading applications 4.) Some applications are delayed at startup. The application will take around 30s to launch, but afterwards it just runs fine. Affected application I found so far are KeepassXC, Filezilla and OnlyOffice Desktop-Editor. From strace I saw this applications are stopping (for about 20-30s) at this point: connect(12, {sa_family=AF_UNIX, sun_path="/run/user/1000/bus"}, 110) = 0 getpid() = 8165 geteuid() = 1000 getegid() = 1000 getpid() = 8165 geteuid() = 1000 getegid() = 1000 sendmsg(12, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\0", iov_len=1}], msg_iovlen=1, msg_control=[{cmsg_len=28, cmsg_level=SOL_SOCKET, cmsg_type=SCM_CREDENTIALS, cmsg_data={pid=8165, uid=1000, gid=1000}}], msg_controllen=32, msg_flags=0}, MSG_NOSIGNAL) = 1 sendto(12, "AUTH\r\n", 6, MSG_NOSIGNAL, NULL, 0) = 6 recvfrom(12, "REJECTED EXTERNAL\r\n", 4096, 0, NULL, NULL) = 19 sendto(12, "AUTH EXTERNAL 31303030\r\n", 24, MSG_NOSIGNAL, NULL, 0) = 24 recvfrom(12, "OK 7f079149c4e5e774135107445dc85"..., 4096, 0, NULL, NULL) = 37 sendto(12, "NEGOTIATE_UNIX_FD\r\n", 19, MSG_NOSIGNAL, NULL, 0) = 19 recvfrom(12, "AGREE_UNIX_FD\r\n", 4096, 0, NULL, NULL) = 15 sendto(12, "BEGIN\r\n", 7, MSG_NOSIGNAL, NULL, 0) = 7 write(15, "\1\0\0\0\0\0\0\0", 8) = 8 eventfd2(0, EFD_CLOEXEC|EFD_NONBLOCK) = 14 write(14, "\1\0\0\0\0\0\0\0", 8) = 8 write(15, "\1\0\0\0\0\0\0\0", 8) = 8 poll([{fd=14, events=POLLIN}], 1, 25000) = 1 ([{fd=14, revents=POLLIN}]) read(14, "\1\0\0\0\0\0\0\0", 16) = 8 poll([{fd=14, events=POLLIN}], 1, 25000 During my first research I found this following to topics related to the issue: https://askubuntu.com/questions/1184774/some-applications-on-ubuntu-19-10-very-slow-to-start This Stackoverflow topic links to the archlinux forum: https://bbs.archlinux.org/viewtopic.php?id=230036 I can confirm that running the delayed applications with "dbus-launch --exit-with-session application" or by running it as root they are all starting without any delay. Thanks for your help! Let me know if you need any further information. Best Regards, Sebastian To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/dbus/+bug/1852016/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp