Core problem traced back to what LOOKS to be a regression in AppArmor owned by the Security team.
For all intents and purposes, `/etc/apparmor.d/abstractions/X` should give read-write to the display sockets. HOWEVER, this has changed in AppArmor. Even if we include the abstractions if they exist to make sure things are read/write, it errors hard, lending itself to this AppArmor deny which causes the segfault once we handle the dbus whining with `#include <abstractions/dbus-session-strict>` in the apparmor rules for Tor Browser: Jun 29 14:31:10 lubuntu-impish-testing kernel: [ 5332.955288] audit: type=1400 audit(1624991470.229:1961): apparmor="DENIED" operation="connect" profile="torbrowser_firefox" name="/tmp/.X11-unix/X0" pid=5234 comm="MainThread" requested_mask="w" denied_mask="w" fsuid=1000 ouid=0 This is a regression in AppArmor because in focal and such it was "rw" in the rules. This may be the display launch problem. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1933886 Title: tor browser not launching in impish (flavors; l/x/kubuntu) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/torbrowser-launcher/+bug/1933886/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
