[Bug 1599950] [NEW] KDE does not display screen lock after suspension

[Infthi]

Public bug reported:

Reproducible:
always

Steps to reproduce:
1. Use a laptop.
2. In system settings, enable "Desktop behavior > Screen Locking > Lock screen on resume".
3. In system settings, set "Power management > Energy saving > When laptop lid closed" to "Suspend".
4. Close laptop lid. Wait your laptop to suspend.
5. Open laptop lid.
6. Log in into system.
7. Enable any context menu (e.g., right-click on the browser titlebar)
8. Close laptop lid. Wait your laptop to suspend.
9. Open laptop lid.

Observed behavior:
A screen lock appears after step 5, but not after step 9.

Expected behavior:
A screen lock should appear both after steps 5 and 9.

System information:
Description:    Ubuntu 16.04 LTS
Release:        16.04
(Actually this is a kubuntu installation)

KDE PLasma version: 5.5.5
Qt Version: 5.5.1
Kernel: 4.4.0-28-generic #47-Ubuntu SMP Fri Jun 24 10:09:13 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

Additional information:
This entries appear in ~/.xsession-errors during suspend/wake:

powerdevil: Suspend session triggered with QMap(("Explicit", QVariant(bool, true))("Type", QVariant(uint, 1)))
powerdevil: Suspend session triggered with QMap(("Explicit", QVariant(bool, true))("SkipFade", QVariant(bool, true))("Type", QVariant(uint, 1)))
powerdevil: Starting Login1 suspend job
lock called
bluedevil: About to suspend
Could not establish screen lock
"No such interface 'org.freedesktop.DBus.Properties' on object at path /"

** Affects: kde-baseapps (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: kde lockscreen suspend

-- 
You received this bug notification because you are a member of Kubuntu
Bugs, which is subscribed to kde-baseapps in Ubuntu.
https://bugs.launchpad.net/bugs/1599950

Title:
  KDE does not display screen lock after suspension

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/kde-baseapps/+bug/1599950/+subscriptions