Using focal Kubuntu. Firefox filling .xsession-errors Has pyqt5 (5.14.1+dfsg-3build1) focal; & current versions of other dbus related files that are standard.
fred@z97-focal-kubuntu:~$ uname -a Linux z97-focal-kubuntu 5.4.0-58-generic #64-Ubuntu SMP Wed Dec 9 08:16:25 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux fred@z97-focal-kubuntu:~$ echo $DESKTOP_SESSION plasma fred@z97-focal-kubuntu:~$ cat /etc/X11/default-display-manager /usr/bin/sddm fred@z97-focal-kubuntu:~$ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=20.04 DISTRIB_CODENAME=focal DISTRIB_DESCRIPTION="Ubuntu 20.04.1 LTS" fred@z97-focal-kubuntu:~$ apt show firefox Package: firefox Version: 84.0+build3-0ubuntu0.20.04.1 ** (/usr/lib/firefox/firefox:112432): WARNING **: 09:37:31.184: Unable to connect to dbus: Could not connect: Permission denied ** (/usr/lib/firefox/firefox:112483): WARNING **: 09:37:31.636: Unable to connect to dbus: Could not connect: Permission denied ** (/usr/lib/firefox/firefox:112515): WARNING **: 09:37:31.830: Unable to connect to dbus: Could not connect: Permission denied ** (/usr/lib/firefox/firefox:112540): WARNING **: 09:37:31.970: Unable to connect to dbus: Could not connect: Permission denied ** (/usr/lib/firefox/firefox:112609): WARNING **: 09:37:33.138: Unable to connect to dbus: Could not connect: Permission denied ** (/usr/lib/firefox/firefox:112734): WARNING **: 09:38:27.515: Unable to connect to dbus: Could not connect: Permission denied ** (/usr/lib/firefox/firefox:112782): WARNING **: 09:38:27.981: Unable to connect to dbus: Could not connect: Permission denied ** (/usr/lib/firefox/firefox:112833): WARNING **: 09:38:28.518: Unable to connect to dbus: Could not connect: Permission denied -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1816296 Title: Unable to connect to dbus: Could not connect: Permission denied To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/appmenu-gtk-module/+bug/1816296/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs