Hi! Those warnings are harmless and should not be related to the segfault. Revision 870 was the last stable amd64 snap based on core18, afaict. Revision 887 (v2.1.0) migrated to core20, and it was followed by the current r975 (v2.2.0):

$ snapcraft list-revisions moonlight | grep stable | grep amd64 | head -3
975     2020-09-10T14:25:36Z  amd64   2.2.0               candidate*, stable*
887     2020-06-28T04:09:21Z  amd64   2.1.0               candidate, stable
870     2020-06-17T13:22:57Z  amd64   2.1.0               candidate, stable

• Are there any relevant messages on dmesg or journalctl?
• What's the output of snap version?
• What's the output of snap list core20 moonlight?
• Do any other snaps based on core20 work in your system? Eg. htop, black, telegram-desktop.

Thanks!

from moonlight-snap.

$ snap version
snap 2.46.1+18.04
snapd 2.46.1+18.04
series 16
ubuntu 18.04
kernel 5.0.0-37-generic

$ snap list core20 moonlight
Name Version Rev Tracking Publisher Notes
core20 20 634 latest/stable canonical✓ base
moonlight 2.2.0 975 latest/stable maxiberta -

I haven't tested other core20 apps, but may give that a try.
It's worth noting that Moonlight-2.2.0-x86_64.AppImage works.

More Apparmor DENIEDs in journalctl and dmesg:
journalctl:
Sep 28 13:03:35 coffee audit[4907]: SECCOMP auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4907 comm="glxinfo" exe="/snap/moonlight/975/usr/bin/glxinfo" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7f33108796e1 code=0x50000
Sep 28 13:03:35 coffee kernel: kauditd_printk_skb: 11 callbacks suppressed
Sep 28 13:03:35 coffee kernel: audit: type=1326 audit(1601312615.730:808): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4907 comm="glxinfo" exe="/snap/moonlight/975/usr/bin/glxinfo" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7
Sep 28 13:03:35 coffee kernel: audit: type=1326 audit(1601312615.730:809): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4907 comm="glxinfo" exe="/snap/moonlight/975/usr/bin/glxinfo" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7
Sep 28 13:03:35 coffee kernel: audit: type=1326 audit(1601312615.730:810): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4907 comm="glxinfo" exe="/snap/moonlight/975/usr/bin/glxinfo" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7
Sep 28 13:03:35 coffee kernel: audit: type=1326 audit(1601312615.730:811): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4907 comm="glxinfo" exe="/snap/moonlight/975/usr/bin/glxinfo" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7
Sep 28 13:03:35 coffee audit[4907]: SECCOMP auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4907 comm="glxinfo" exe="/snap/moonlight/975/usr/bin/glxinfo" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7f33108796e1 code=0x50000
Sep 28 13:03:35 coffee audit[4907]: SECCOMP auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4907 comm="glxinfo" exe="/snap/moonlight/975/usr/bin/glxinfo" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7f33108796e1 code=0x50000
Sep 28 13:03:35 coffee audit[4907]: SECCOMP auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4907 comm="glxinfo" exe="/snap/moonlight/975/usr/bin/glxinfo" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7f33108796e1 code=0x50000
Sep 28 13:03:35 coffee audit[4907]: AVC apparmor="DENIED" operation="open" profile="snap.moonlight.moonlight" name="/proc/sys/dev/i915/perf_stream_paranoid" pid=4907 comm="glxinfo" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
Sep 28 13:03:35 coffee kernel: audit: type=1400 audit(1601312615.734:812): apparmor="DENIED" operation="open" profile="snap.moonlight.moonlight" name="/proc/sys/dev/i915/perf_stream_paranoid" pid=4907 comm="glxinfo" requested_mask="r" de
Sep 28 13:03:35 coffee audit[4809]: SECCOMP auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4809 comm="moonlight" exe="/snap/moonlight/975/usr/bin/moonlight" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7f348368f6e1 code=0x50000
Sep 28 13:03:35 coffee audit[4809]: SECCOMP auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4809 comm="moonlight" exe="/snap/moonlight/975/usr/bin/moonlight" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7f348368f6e1 code=0x50000
Sep 28 13:03:35 coffee audit[4809]: SECCOMP auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4809 comm="moonlight" exe="/snap/moonlight/975/usr/bin/moonlight" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7f348368f6e1 code=0x50000
Sep 28 13:03:35 coffee audit[4809]: SECCOMP auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4809 comm="moonlight" exe="/snap/moonlight/975/usr/bin/moonlight" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7f348368f6e1 code=0x50000
Sep 28 13:03:35 coffee audit[4809]: AVC apparmor="DENIED" operation="open" profile="snap.moonlight.moonlight" name="/proc/sys/dev/i915/perf_stream_paranoid" pid=4809 comm="moonlight" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
Sep 28 13:03:35 coffee kernel: audit: type=1326 audit(1601312615.826:813): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4809 comm="moonlight" exe="/snap/moonlight/975/usr/bin/moonlight" sig=0 arch=c000003e syscall=203 compat=0 ip
Sep 28 13:03:35 coffee kernel: audit: type=1326 audit(1601312615.826:814): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4809 comm="moonlight" exe="/snap/moonlight/975/usr/bin/moonlight" sig=0 arch=c000003e syscall=203 compat=0 ip
Sep 28 13:03:35 coffee kernel: audit: type=1326 audit(1601312615.826:815): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4809 comm="moonlight" exe="/snap/moonlight/975/usr/bin/moonlight" sig=0 arch=c000003e syscall=203 compat=0 ip
Sep 28 13:03:35 coffee kernel: audit: type=1326 audit(1601312615.826:816): auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4809 comm="moonlight" exe="/snap/moonlight/975/usr/bin/moonlight" sig=0 arch=c000003e syscall=203 compat=0 ip
Sep 28 13:03:35 coffee kernel: audit: type=1400 audit(1601312615.826:817): apparmor="DENIED" operation="open" profile="snap.moonlight.moonlight" name="/proc/sys/dev/i915/perf_stream_paranoid" pid=4809 comm="moonlight" requested_mask="r"
Sep 28 13:03:35 coffee dbus-daemon[2112]: apparmor="DENIED" operation="dbus_method_call" bus="session" path="/org/a11y/bus" interface="org.freedesktop.DBus.Properties" member="Get" mask="send" name="org.a11y.Bus" pid=4809 label="snap.mo
Sep 28 13:03:35 coffee audit[4809]: SECCOMP auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4809 comm="moonlight" exe="/snap/moonlight/975/usr/bin/moonlight" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7f348368f6e1 code=0x50000
Sep 28 13:03:35 coffee audit[4809]: SECCOMP auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4809 comm="moonlight" exe="/snap/moonlight/975/usr/bin/moonlight" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7f348368f6e1 code=0x50000
Sep 28 13:03:35 coffee audit[4809]: SECCOMP auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4809 comm="moonlight" exe="/snap/moonlight/975/usr/bin/moonlight" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7f348368f6e1 code=0x50000
Sep 28 13:03:35 coffee audit[4809]: SECCOMP auid=4294967295 uid=1000 gid=1000 ses=4294967295 pid=4809 comm="moonlight" exe="/snap/moonlight/975/usr/bin/moonlight" sig=0 arch=c000003e syscall=203 compat=0 ip=0x7f348368f6e1 code=0x50000
Sep 28 13:03:35 coffee audit[4809]: AVC apparmor="DENIED" operation="open" profile="snap.moonlight.moonlight" name="/proc/sys/dev/i915/perf_stream_paranoid" pid=4809 comm="moonlight" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
Sep 28 13:03:35 coffee audit[1166]: USER_AVC pid=1166 uid=103 auid=4294967295 ses=4294967295 msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/NetworkManager" interface="org.freedesktop.DBus.Propert
exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
Sep 28 13:03:35 coffee audit[1166]: USER_AVC pid=1166 uid=103 auid=4294967295 ses=4294967295 msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/NetworkManager" interface="org.freedesktop.NetworkManag
exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
Sep 28 13:03:35 coffee audit[1166]: USER_AVC pid=1166 uid=103 auid=4294967295 ses=4294967295 msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/NetworkManager/Settings" interface="org.freedesktop.Net
exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
Sep 28 13:03:35 coffee audit[1166]: USER_AVC pid=1166 uid=103 auid=4294967295 ses=4294967295 msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/NetworkManager/Settings" interface="org.freedesktop.Net
exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'
Sep 28 13:03:35 coffee audit[1166]: USER_AVC pid=1166 uid=103 auid=4294967295 ses=4294967295 msg='apparmor="DENIED" operation="dbus_method_call" bus="system" path="/org/freedesktop/NetworkManager/Settings" interface="org.freedesktop.Net
exe="/usr/bin/dbus-daemon" sauid=103 hostname=? addr=? terminal=?'

From dmesg, only the graphics DENIEDs showed up:
$ dmesg -T | grep DENIED
...
[Mon Sep 28 13:04:55 2020] audit: type=1400 audit(1601312615.734:812): apparmor="DENIED" operation="open" profile="snap.moonlight.moonlight" name="/proc/sys/dev/i915/perf_stream_paranoid" pid=4907 comm="glxinfo" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0
[Mon Sep 28 13:04:55 2020] audit: type=1400 audit(1601312615.826:817): apparmor="DENIED" operation="open" profile="snap.moonlight.moonlight" name="/proc/sys/dev/i915/perf_stream_paranoid" pid=4809 comm="moonlight" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0

from moonlight-snap.

Hm, those non-networkmanager denials look bad. Could you please check a couple more things for me?

• Are you running Xorg or wayland? What's your gpu?
• Are snap permissions ok? Check snap connections moonlight
• Can you please try the snap on the edge channel, which includes some extra debugging utilities?
  • sudo snap refresh moonlight --edge (can later go back to stable with --stable)
  • moonlight.glxinfo -B

Thanks!

from moonlight-snap.

Xorg / Intel i7 8086K UHD 630

snap connections moonlight

Interface Plug Slot Notes
audio-playback moonlight:audio-playback :audio-playback -
desktop moonlight:desktop :desktop -
desktop-legacy moonlight:desktop-legacy :desktop-legacy -
home moonlight:home :home -
joystick moonlight:joystick :joystick -
network moonlight:network :network -
opengl moonlight:opengl :opengl -
screen-inhibit-control moonlight:screen-inhibit-control :screen-inhibit-control -
wayland moonlight:wayland :wayland -
x11 moonlight:x11 :x11 -

$ moonlight.glxinfo -B

• case "$SNAP_ARCH" in
• ARCH=x86_64-linux-gnu
  ++ glxinfo
  ++ grep 'OpenGL vendor'
• VENDOR='OpenGL vendor string: Intel'
• export VDPAU_DRIVER_PATH=/snap/moonlight/976/usr/lib/x86_64-linux-gnu/vdpau
• VDPAU_DRIVER_PATH=/snap/moonlight/976/usr/lib/x86_64-linux-gnu/vdpau
• export LIBVA_DRIVERS_PATH=/snap/moonlight/976/usr/lib/x86_64-linux-gnu/dri
• LIBVA_DRIVERS_PATH=/snap/moonlight/976/usr/lib/x86_64-linux-gnu/dri
• export __EGL_VENDOR_LIBRARY_DIRS=/snap/moonlight/976/etc/glvnd/egl_vendor.d:/snap/moonlight/976/usr/share/glvnd/egl_vendor.d:/snap/moonlight/976/etc/glvnd/egl_vendor.d:/snap/moonlight/976/usr/share/glvnd/egl_vendor.d
• __EGL_VENDOR_LIBRARY_DIRS=/snap/moonlight/976/etc/glvnd/egl_vendor.d:/snap/moonlight/976/usr/share/glvnd/egl_vendor.d:/snap/moonlight/976/etc/glvnd/egl_vendor.d:/snap/moonlight/976/usr/share/glvnd/egl_vendor.d
• [[ OpenGL vendor string: Intel == \N\V\I\D\I\A ]]
• exec /snap/moonlight/976/usr/bin/glxinfo -B
  name of display: :0.0
  display: :0 screen: 0
  direct rendering: Yes
  Extended renderer info (GLX_MESA_query_renderer):
  Vendor: Intel (0x8086)
  Device: Mesa Intel(R) UHD Graphics 630 (CFL GT2) (0x3e92)
  Version: 20.0.8
  Accelerated: yes
  Video memory: 3072MB
  Unified memory: yes
  Preferred profile: core (0x1)
  Max core profile version: 4.6
  Max compat profile version: 4.6
  Max GLES1 profile version: 1.1
  Max GLES[23] profile version: 3.2
  OpenGL vendor string: Intel
  OpenGL renderer string: Mesa Intel(R) UHD Graphics 630 (CFL GT2)
  OpenGL core profile version string: 4.6 (Core Profile) Mesa 20.0.8
  OpenGL core profile shading language version string: 4.60
  OpenGL core profile context flags: (none)
  OpenGL core profile profile mask: core profile

OpenGL version string: 4.6 (Compatibility Profile) Mesa 20.0.8
OpenGL shading language version string: 4.60
OpenGL context flags: (none)
OpenGL profile mask: compatibility profile

OpenGL ES profile version string: OpenGL ES 3.2 Mesa 20.0.8
OpenGL ES profile shading language version string: OpenGL ES GLSL ES 3.20

from moonlight-snap.