Light locker menu entry in Lubuntu Xenial does nothing

Bug #1556918 reported by Henk Terhell on 2016-03-14
This bug affects 8 people
Affects Status Importance Assigned to Milestone
light-locker (Ubuntu)

Bug Description

The menu entry 'Preferences>Light Locker Settings' does nothing in Lubuntu Xenial. The XFCE Power Manager may have now replaced this.

The following message is shown from CLI running light-locker:

ght-locker:3951): WARNING **: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files

** (light-locker:3951): WARNING **: screensaver already running in this session

Ubuntu QA Website (ubuntuqa) wrote :

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:

tags: added: iso-testing
Henk Terhell (hterhell) on 2016-03-26
summary: - Light locker menu entry in Lubuntu Xenial
+ Light locker menu entry in Lubuntu Xenial does nothing
Launchpad Janitor (janitor) wrote :

Status changed to 'Confirmed' because the bug affects multiple users.

Changed in light-locker (Ubuntu):
status: New → Confirmed
pinportal (pinportal) wrote :

Anyone know how to solve this bug?

Thank you.

Phill Whiteside (phillw) wrote :

Jorn has found a working fix..
there is already a bugfix on Launchpad, but it doesn't get reviewed and merged:

Phill Whiteside (phillw) wrote :

Also, as pointed out on the summary, has the functionality that Light Locker brings been rolled into xcfe Power Manager?

Simon Steinbeiß (ochosi) wrote :

@phillw: Sorry, the link to that merge-request seems broken.

To be clear, the functionality of light-locker-settings has been rolled into xfce4-power-manager, not the functionality of light-locker itself.

The message from light-locker is odd, the a11y warning can be disregarded, but the notice that another screensaver is already running is strange. Does lubuntu install another screensaver on top of light-locker?

Robert Frittmann (frittmann) wrote :

I've also experienced this problem. I'm running a clean install of Lubuntu 16.04 Xenial Xerus on an AMD A4 chipset desktop PC with AMD Radeon HD6410 APU.

I've also noticed that whenever lightlocker kicks in, the desktop session crashes. When I return to wake up the screen, I am faced with the session login screen, rather than the unlock dialog, and the applications which were running before the screensaver started are now not running = new session. I don't know if this is a related bug, or if there is a separate bug report for this issue, but it seems related to me. I also vaguely recall this second issue being a problem in an earlier LTS release, possibly Precise or Trusty.

Regards Simon's question "Does lubuntu install another screensaver on top of light-locker?" I have seen instances where an upgrade install (eg Xubuntu DE on top of Ubuntu) can cause gnome-screensaver to coexist with light locker, causing problems. See, for example

Robert, that sounds like bug 1579699.

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