It seems a recent update to pulseaudio has fixed my issue. Updated my system yesterday, june 12, which also came with a kernel update which prompted a reboot per usual and volume levels seem to be normal now after reboot and after a shutdown and restart.
-- Volume at login set to Maximum https://bugs.launchpad.net/bugs/598308 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs