Fixed in libx11 version 1.7.0 with https://gitlab.freedesktop.org/xorg/lib/libx11/-/commit/dbb55e1a5e82870466b095097d9e46046680ec25
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to libx11 in Ubuntu. https://bugs.launchpad.net/bugs/1782984 Title: Assertion `!xcb_xlib_threads_sequence_lost' failed with multiple applications Status in libx11 package in Ubuntu: Confirmed Bug description: STEPS TO REPRODUCE ================== The bug seems to occur when clicking on a file or folder. It is random and difficult to provide clear steps to reproduce. It is, however, a common situation. EXPECTED RESULTS ================ pcmanfm works without problem. ACTUAL RESULTS ============== All pcmanfm windows become unresponsive, though background processes (e.g. copying) may continue without problem. with the same error message in ~/.cache/lxsession/LXDE/run.log: [xcb] Unknown sequence number while processing queue [xcb] Most likely this is a multi-threaded client and XInitThreads has not been called [xcb] Aborting, sorry about that. pcmanfm: xcb_io.c:259: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed. ** Message: 19:58:49.267: app.vala:130: pcmanfm exit with this type of exit: 6 ** Message: 19:58:49.268: app.vala:148: Exit not normal, try to reload (note the timestamp on the message will vary) AFFECTED VERSIONS ================= 1.2.5-3ubuntu1 NOT 1.2.4-1ubuntu0.1 UPSTREAM BUG ============ https://sourceforge.net/p/pcmanfm/bugs/1089/ ADDITIONAL NOTES ================ Other GTK2 file managers (e.g. Thunar) and applications (e.g. GIMP, Leafpad) seem to have the same problems. This is probably at least rooted in a GTK2 bug: https://bugs.launchpad.net/ubuntu/+source/gtk+2.0/+bug/1808710 To further assert this, note that there is a SpaceFM file manager that is available in GTK2 and GTK3. The GTK2 version displays the behavior. The GTK3 version does not. Same with LibreOffice. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libx11/+bug/1782984/+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
