Public bug reported:

Trying to launch the "Ubuntu Software" application from the gnome
application launcher (or any method) results in multiple apparmor errors
being reported in systemd-journald and dmesg.

I expected the link to launch the application, instead I had to install
gnome-software separately to have a gui installer.

Not a big problem for me, as I mainly use the terminal, but definitely
not the expected behaviour when it comes to app discovery and general
purpose use.

Messages pulled from dmesg:
[65915.924471] traps: snap-store[285837] trap int3 ip:7f2a6bbe7a13 
sp:7ffe0e280bb0 error:0 in libglib-2.0.so.0.6200.6[7f2a6bb82000+13f000]
[65915.924579] audit: type=1400 audit(1587929541.871:1019): apparmor="DENIED" 
operation="open" profile="snap.snap-store.ubuntu-software" 
name="/var/lib/snapd/hostfs/usr/share/glib-2.0/schemas/gschemas.compiled" 
pid=285837 comm="snap-store" requested_mask="r" denied_mask="r" fsuid=1000 
ouid=0

Also, can't report this for snap-store or ubuntu-software, so I selected
gnome-software

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-software (not installed)
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 26 13:27:08 2020
InstallationDate: Installed on 2020-04-25 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
InstalledPlugins:
 gnome-software-plugin-flatpak N/A
 gnome-software-plugin-snap    3.36.0-0ubuntu3
SourcePackage: gnome-software
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: gnome-software (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-software in Ubuntu.
https://bugs.launchpad.net/bugs/1875229

Title:
  Ubuntu Software doesn't launch

Status in gnome-software package in Ubuntu:
  New

Bug description:
  Trying to launch the "Ubuntu Software" application from the gnome
  application launcher (or any method) results in multiple apparmor
  errors being reported in systemd-journald and dmesg.

  I expected the link to launch the application, instead I had to
  install gnome-software separately to have a gui installer.

  Not a big problem for me, as I mainly use the terminal, but definitely
  not the expected behaviour when it comes to app discovery and general
  purpose use.

  Messages pulled from dmesg:
  [65915.924471] traps: snap-store[285837] trap int3 ip:7f2a6bbe7a13 
sp:7ffe0e280bb0 error:0 in libglib-2.0.so.0.6200.6[7f2a6bb82000+13f000]
  [65915.924579] audit: type=1400 audit(1587929541.871:1019): apparmor="DENIED" 
operation="open" profile="snap.snap-store.ubuntu-software" 
name="/var/lib/snapd/hostfs/usr/share/glib-2.0/schemas/gschemas.compiled" 
pid=285837 comm="snap-store" requested_mask="r" denied_mask="r" fsuid=1000 
ouid=0

  Also, can't report this for snap-store or ubuntu-software, so I
  selected gnome-software

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubuntu-software (not installed)
  ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
  Uname: Linux 5.4.0-26-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu27
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Sun Apr 26 13:27:08 2020
  InstallationDate: Installed on 2020-04-25 (0 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
  InstalledPlugins:
   gnome-software-plugin-flatpak N/A
   gnome-software-plugin-snap    3.36.0-0ubuntu3
  SourcePackage: gnome-software
  UpgradeStatus: No upgrade log present (probably fresh install)

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https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1875229/+subscriptions

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