I still encounter this error with version 68.2.2 on Ubuntu 18.04.3. I also have an upgraded system from 16.04 like @grzesiekc. I removed thunderbird and xul-ext-lightning and then reinstalled.
$ lsb_release -a LSB Version: core-9.20170808ubuntu1-noarch:security-9.20170808ubuntu1-noarch Distributor ID: Ubuntu Description: Ubuntu 18.04.3 LTS Release: 18.04 Codename: bionic $ apt-show-versions thunderbird thunderbird:amd64/bionic-security 1:68.2.2+build1-0ubuntu0.18.04.1 uptodate $ sudo apparmor_status | grep thunderbird thunderbird thunderbird//browser_java thunderbird//browser_openjdk thunderbird//gpg thunderbird//sanitized_helper $ sudo apparmor_parser -R thunderbird File thunderbird not found, skipping... $ journalctl -f | grep DEN Dec 13 20:23:39 MSPC2011 audit[28379]: AVC apparmor="DENIED" operation="capable" profile="thunderbird" pid=28379 comm="thunderbird" capability=21 capname="sys_admin" Dec 13 20:23:39 MSPC2011 kernel: audit: type=1400 audit(1576265019.934:721): apparmor="DENIED" operation="capable" profile="thunderbird" pid=28379 comm="thunderbird" capability=21 capname="sys_admin" Dec 13 20:23:41 MSPC2011 audit[28379]: AVC apparmor="DENIED" operation="mknod" profile="thunderbird" name="/dev/shm/org.mozilla.ipc.28379.0" pid=28379 comm="thunderbird" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000 Dec 13 20:23:41 MSPC2011 kernel: audit: type=1400 audit(1576265021.878:722): apparmor="DENIED" operation="mknod" profile="thunderbird" name="/dev/shm/org.mozilla.ipc.28379.0" pid=28379 comm="thunderbird" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000 $ thunderbird 1576265020207 addons.xpi WARN Not converting unknown addon type undefined [28379, Main Thread] WARNING: failed to open shm: Permission denied: file /build/thunderbird-qepI16/thunderbird-68.2.2+build1/ipc/chromium/src/base/shared_memory_posix.cc, line 142 [GFX1-]: Failed to lock new back buffer. [28379, Main Thread] WARNING: failed to open shm: Permission denied: file /build/thunderbird-qepI16/thunderbird-68.2.2+build1/ipc/chromium/src/base/shared_memory_posix.cc, line 142 [GFX1-]: Failed to lock new back buffer. [28379, Main Thread] WARNING: failed to open shm: Permission denied: file /build/thunderbird-qepI16/thunderbird-68.2.2+build1/ipc/chromium/src/base/shared_memory_posix.cc, line 142 I already tried settings the permissions on /dev/shm as suggested here: https://www.linuxquestions.org/questions/slackware-14/thunderbird-60-black-windows-running-as-user-4175637823/ Is this the same bug or a different one and can I add additional diagnosis to clarify this? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1850064 Title: Please upgrade it to 68.x on Ubuntu 18.04 LTS To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1850064/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
