Comment 6 for bug 1592714

Hi Josué, the specified denial is this:
kernel: [ 598.952301] audit: type=1400 audit(1466339978.463:31): apparmor="DENIED" operation="open" profile="snap.telegram-sergiusens.telegram" name="/etc/openal/alsoft.conf" pid=2342 comm="Telegram" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0

This indicates a problem not with the systray but with openal, an audio library. I'm curious if you are seeing a cascading failure. Can you modify /var/lib/snapd/apparmor/profiles/snap.telegram-sergiusens.telegram to have before the last '}':

 /etc/openal/* r,

then do:
$ sudo apparmor_parser -r /var/lib/snapd/apparmor/profiles/snap.telegram-sergiusens.telegram

and try again? Please report back any new denials in /var/log/syslog and if this worked around the issue or not.

Thanks!