------- Comment From bren...@br.ibm.com 2017-10-19 09:20 EDT------- *** Bug 150856 has been marked as a duplicate of this bug. ***
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pm-utils in Ubuntu. https://bugs.launchpad.net/bugs/1706948 Title: [Ubuntu 1710] [Feature] Inconsistent report of pm CanSuspend state by systemd and pm-utils Status in The Ubuntu-power-systems project: Incomplete Status in pm-utils package in Ubuntu: Incomplete Bug description: == Comment: #0 - Balamuruhan S <> - 2017-06-28 03:39:15 == systemd and pm-utils interprets CanSuspend states differently and reports it as supported or not in a conflicting way. # gdbus call --system --dest org.freedesktop.login1 --object-path /org/freedesktop/login1 --method org.freedesktop.login1.Manager.CanSuspend ('yes',) # pm-is-supported --suspend # echo $? 1 Both systemd and pm-is-supported looks into /sys/power/state file to check if suspend is supported. pm-is-supported --suspend returns true if either "standby" or "mem" is present in the file. ( /usr/lib/pm-utils/pm-functions ) systemd(Manager.CanSuspend) returns true if "standby", "freeze" or "mem" is present in the file. ( https://github.com/systemd/systemd/blob/dd8352659c9428b196706d04399eec106a8917ed/src/shared/sleep-config.c ) # cat /sys/power/state freeze So here, pm-is-supported --suspend returns false and gdbus returns true. Both these utilities interpret /sys/power/state differently. Secondly, systemd should split CanSuspend to Cansuspend+CanFreeze Or don't report freeze as CanSuspend. Impact of this inconsistency can be felt from Libvirt supported pm states: To reduce ABI dependency, libvirt queries the available states via dbus, if not falls to pm-utils. Libvirt won't check for strings in sys/power/state and interpret directly. so due to this, libvirt will list that suspend_to_mem is supported from virsh capabilities but ideally it might not. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-power-systems/+bug/1706948/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
