I'm running Ubuntu 22.04.02 LTS and just applied some updates as recommended by the OS. SInce then my Brave browser (& all other browsers) stopped working and would not launch from the sidebar. While inspecting the logs (/var/log/syslog), I noticed following error when brave browser's icon is clicked:
Jul 1 22:53:24 192 systemd[2538]: Started Application launched by gnome-shell.
Jul 1 22:53:24 192 kernel: [ 2000.674804] audit: type=1400 audit(1688277204.763:272): apparmor="DENIED" operation="userns_create" class="namespace" info="User namespace creation restricted" error=-13 profile="unconfined" pid=9138 comm="brave" requested="userns_create" denied="userns_create"
Jul 1 22:53:24 192 brave-browser.desktop[9137]: [9138:9138:0701/225324.763612:FATAL:credentials.cc(127)] Check failed: . : Permission denied (13)
Jul 1 22:53:24 192 brave-browser.desktop[9137]: /usr/bin/brave-browser-stable: line 48: 9138 Trace/breakpoint trap (core dumped) "$HERE/brave" "$@"
When I look under /etc/apparmore.d directory, there are no profiles (active or disabled) for Brave, here is the content of this directory:
adm@localhost:~# ls /etc/apparmor.d/
abi local tunables usr.bin.tcpdump usr.lib.libreoffice.program.xpdfimport usr.sbin.ippusbxd
abstractions lsb_release usr.bin.evince usr.lib.libreoffice.program.oosplash usr.lib.snapd.snap-confine.real usr.sbin.ntpd
disable nvidia_modprobe usr.bin.firefox usr.lib.libreoffice.program.senddoc usr.sbin.cups-browsed usr.sbin.rsyslogd
force-complain sbin.dhclient usr.bin.man usr.lib.libreoffice.program.soffice.bin usr.sbin.cupsd usr.sbin.sssd
Any idea/pointers to fix this problem or investigate it further?
Thanks.
