1. Thank you. 2. I tryed with kernel 4.5.0.2-default now. I needed to reboot 3 times to get to the error state again. disk@nohostname:~> dmesg |grep overlay disk@nohostname:~> su Password: nohostname:/home/disk # dmesg |grep overlay nohostname:/home/disk # dmesg |grep overlay nohostname:/home/disk # journalctl |grep overlay Apr 06 22:21:53 nohostname sudo[1325]: disk : TTY=unknown ; PWD=/home/disk ; USER=root ; COMMAND=/usr/bin/psd-overlay-helper Apr 06 22:21:53 nohostname audit[1325]: USER_CMD pid=1325 uid=1001 auid=4294967295 ses=4294967295 msg='cwd="/home/disk" cmd="psd-overlay-helper" terminal=? res=success' Apr 06 22:21:53 nohostname sudo[1573]: disk : TTY=unknown ; PWD=/home/disk ; USER=root ; COMMAND=/usr/bin/psd-overlay-helper -v 23 -l /home/disk/.mozilla/firefox/hyoinmm5.default-backup -u /run/user/1001/disk-firefox-hyoinmm5.default-rw -w /run/user/1001/.disk-firefox-hyoinmm5.default -d /run/user/1001/disk-firefox-hyoinmm5.default mountup nohostname:/home/disk # Firefox profile is now broken and it shows "Secure Connection Failed". If i reboot with the newer kernel it will be back. So i could test. No - problem.