FWIW this seems to occur about 1 - 2 minutes after logging in.
There are several AppArmor messages that seem to preceed this event in dmesg, for example
[35413.305676] audit: type=1400 audit(1476675671.740:36): apparmor="DENIED" operation="open" profile="/usr/lib/telepathy/mission-control-5" name="/home/clh/.local/share/accounts/services/" pid=26793 comm="mission-control" requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000 [35413.307066] audit: type=1400 audit(1476675671.740:37): apparmor="DENIED" operation="sendmsg" profile="/usr/lib/telepathy/mission-control-5" name="/run/systemd/journal/socket" pid=26793 comm="mission-control" requested_mask="w" denied_mask="w" fsuid=1000 ouid=0 [35418.062909] audit: type=1400 audit(1476675676.496:38): apparmor="DENIED" operation="sendmsg" profile="/usr/lib/telepathy/telepathy-*" name="/run/systemd/journal/socket" pid=26772 comm="telepathy-haze" requested_mask="w" denied_mask="w" fsuid=1000 ouid=0 [35648.374091] compiz[26573]: segfault at 20 ip 00007fcc5263d34c sp 00007fff685443f0 error 4 in libunityshell.so[7fcc52243000+5df000]
FWIW this seems to occur about 1 - 2 minutes after logging in.
There are several AppArmor messages that seem to preceed this event in dmesg, for example
[35413.305676] audit: type=1400 audit(147667567 1.740:36) : apparmor="DENIED" operation="open" profile= "/usr/lib/ telepathy/ mission- control- 5" name="/ home/clh/ .local/ share/accounts/ services/ " pid=26793 comm="mission- control" requested_mask="r" denied_mask="r" fsuid=1000 ouid=1000 1.740:37) : apparmor="DENIED" operation="sendmsg" profile= "/usr/lib/ telepathy/ mission- control- 5" name="/ run/systemd/ journal/ socket" pid=26793 comm="mission- control" requested_mask="w" denied_mask="w" fsuid=1000 ouid=0 6.496:38) : apparmor="DENIED" operation="sendmsg" profile= "/usr/lib/ telepathy/ telepathy- *" name="/ run/systemd/ journal/ socket" pid=26772 comm="telepathy -haze" requested_mask="w" denied_mask="w" fsuid=1000 ouid=0 so[7fcc52243000 +5df000]
[35413.307066] audit: type=1400 audit(147667567
[35418.062909] audit: type=1400 audit(147667567
[35648.374091] compiz[26573]: segfault at 20 ip 00007fcc5263d34c sp 00007fff685443f0 error 4 in libunityshell.