Created attachment 261067 [details] kdump (default options plus time stamps) of the start of the problem After the May 16 commit, mate-session goes into a tight cycle of polls that consume one thread and leaves mate-session non-functional. This started after 6024c2a1b1f592e with no changes to mate-session-manager. Rebuild of mate-session-manager did not affect the problem. While many operations that involved the creation of a new gnome-based window seemed to trigger the problem, it is reliably triggered by running this command: mate-terminal --geometry 80x30 --profile=Default -t server -x ssh -l USER SYSTEM always triggered the problem. Use of ktrace to monitor mate-session process showed a failure in communication between mate-session and dbus. After the failure, mate-session attempts to open a new connection to dbus which results in continual attempts to poll dbus. While this may involve a problem with mate-session, the issue only occurs after the update to dbus on May 16. System notes: Alder Lake 12 thread CPU running 15-current most recently running ain-n277560-99976934274d
Can you please check if the following patch fixes the problem for you? https://github.com/arrowd/freebsd-ports/commit/76c1cb097d98d354fe4e0671e2c273458cacebe7
The issue vanished after updating to 1500046.