** Description changed: - I have been using Lubuntu for several years, and in my experience - PCManFM is persistently unstable and subject to regular random crashes. - Typically, after using PCManFM for a while it freezes when a folder is - selected (mouse left-click) and crashes. Since upgrading to Lubuntu - 18.04, these PCManFM crashes have become more frequent (1+ crash per - day). Similar problems have been reported by others, but apparently the - fundamental issue remains unresolved: + 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. - https://ubuntuforums.org/showthread.php?t=1889611 - https://ubuntuforums.org/showthread.php?t=1890206 + EXPECTED RESULTS + ================ + pcmanfm works without problem. - ProblemType: Bug - DistroRelease: Ubuntu 18.04 - Package: pcmanfm 1.2.5-3ubuntu1 - ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18 - Uname: Linux 4.15.0-29-generic x86_64 - ApportVersion: 2.20.9-0ubuntu7.2 - Architecture: amd64 - Config_pcmanfm_System_Lubuntu: Error: [Errno 2] No such file or directory: '/etc/xdg/pcmanfm/Lubuntu/lubuntu.conf' - CurrentDesktop: LXDE - Date: Sun Jul 22 13:31:33 2018 - EcryptfsInUse: Yes - InstallationDate: Installed on 2017-11-10 (253 days ago) - InstallationMedia: Lubuntu 17.10 "Artful Aardvark" - Release amd64 (20171017.1) - SourcePackage: pcmanfm - Udisks_dump: Error: [Errno 2] No such file or directory: 'udisks': 'udisks' - UpgradeStatus: Upgraded to bionic on 2018-05-02 (81 days ago) + 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.
** Tags added: lubuntu ** Summary changed: - PCManFM crashes frequently on Lubuntu 18.04 + PCManFM freezes with Assertion `!xcb_xlib_threads_sequence_lost' failed when clicking on a file or folder in 18.04 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1782984 Title: PCManFM freezes with Assertion `!xcb_xlib_threads_sequence_lost' failed when clicking on a file or folder in 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pcmanfm/+bug/1782984/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
