Hello Peter, Am 01.01.19 um 16:13 schrieb Peter Tuharsky: > Finally I found the culprit. It was apparmor! > > I have never intentionally done anything with it, but upgrading kernel > version from 4.9 to 4.18 (due to some kernel 4.9 security upgrade > problem that freezes my computer), it must have enabled apparmor by > default or so.
the default of the Thunderbird package is to *not* enable the Apparmor profile on first time installation and also on updating. On exception on updates, if the user had activate the AA profile in the past the package update does not deactivate it. So I can just think of an active setting to use the AA profile of Thunderbird which got really active again with the re-installation of AppArmor. > And since I have my home folder symlinked to other drive, and apparmor > does not support symlinks, it denied Thunderbird the access to its lock > file (and other files as well). This makes your report a duplicate of #882218 [1]. > After I manually added the real drive path of my profile in > /etc/apparmor.d/usr.bin.thunderbird, it now works. This will get overriden by the next update of the Thunderbird package, head down to the bottom of the profile, you well see the following: > # Site-specific additions and overrides. See local/README for details. > #include <local/usr.bin.thunderbird> > } So this is the right place for needed modifications. Have a look at /etc/apparmor.d/local/README for further information. If ypu have some useful additions for the file /usr/share//doc/thunderbird/README.apparmor then please try to write it down and let us know, the READMEs can always get improvements. > Should I encounter more problems with other apps, I may as well > completely disable apparmor in grub config. Hmm, if you want to disable AppArmor completely why not remove the package then? I know it's not the answer you probably want to hear but reporting the problems would be better. :) The AppArmor people in Debian are a really responsive team. [1] https://bugs.debian.org/882218 -- Regards Carsten Schoenert
