Comment 3 for bug 1243844

Dongseong Hwang, this issue is now documented in https://help.ubuntu.com/community/UpgradeNotes . Despite this, power management disablement from Software Updater (package update-manager) would be user-space initiated, and would have to be made aware of current settings to adjust (ex. /etc/systemd/logind.conf ) or whatever would be the appropriate implementation. -> update-manager (Ubuntu)

Please reassign if found to be incorrect package.