lubuntu 19.04 qa-test daily x86 live -- screensaver hiding only primary display (not secondary display)

Bug #1807665 reported by Chris Guiver on 2018-12-10
This bug affects 1 person
Affects Status Importance Assigned to Milestone
lubuntu-meta (Ubuntu)

Bug Description

Lubuntu 19.04 daily image (x86) tested on d610 (i915, 1gb, ..)
QA-test (i386 live)

-- Addition: also occurs on x86_64 in QA-testing if displays are vertically aligned
-- see also

dell d610 laptop, but with external monitor attached.

left alone, xscreensaver takes effect hiding laptop display, but external monitor does not get blanked, and its display does not change (so information on it could be read by others etc). expectation would be when 'lock' occurs display would be blanked, or hidden by xscreensaver output too.

this could be because it's running in 'live' mode (no locker running?), so importance is likely 0%.
i have NOT noticed it on an installed system, but I checked thumb-drive-media integrity (pass) and rebooted & same result (has occurred 3x on same machine now over two boots, but same thumb-drive)

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: lubuntu-desktop 1.16
ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
Uname: Linux 4.18.0-11-generic i686
ApportVersion: 2.20.10-0ubuntu14
Architecture: i386
CasperVersion: 1.401
CurrentDesktop: LXQt
Date: Mon Dec 10 07:16:03 2018
LiveMediaBuild: Lubuntu 19.04 "Disco Dingo" - Alpha i386 (20181209)
SourcePackage: lubuntu-meta
UpgradeStatus: No upgrade log present (probably fresh install)

Chris Guiver (guiverc) wrote :
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
Chris Guiver (guiverc) wrote :

this may still exist; x86 & gone & I forgot, but discovered a 'new' bug
that may be a duplicate of this one... 19.04 x86_64

Chris Guiver (guiverc) wrote :

2019-02-17 19:30 QA-Test Lubuntu 19.04 daily (live) x86_64

// this [screensaver] issue occurs on my installed system too (Lubuntu only, not when logged in via XFCE/Xubuntu; I rarely use GNOME/Ubuntu..)
// the following is selected bits pasted from my QA-TEST comment
// minor note: vlc is mentioned in a drag - it was playing background music

dell [optiplex] 960 (c2q-q9400, 8gb, amd/ati cedar radeon hd 5000/6000/7350/8350)

Now change orientation of displays, pref->lxqtsett->monitor.settings_set.position
DVI-1 is setup directly BELOW DVI-0 (my real setup has slight horizontal diff, but that creates more issues I now ignore for qa-testing; vertical arrangement is simpler to replicate)
drag VLC so it's full onscreen (only left part was visible - ignoring this)..

This is my USED system, .. Yes my system is hugely modified (xubuntu & ubuntu are installed, lots of apps, lots of changes but mostly to xfce)...

went and changed screensaver to 1 min, m6502 selected & wait... screen dims then screensaver operates on dvi0 but dvi1 returns to show what is was showing (unhidden).. I didn't have a changing window on that display so will move vlc to that one so I can verify count still changes...
opened qterminal (ctrl+alt+T) and maximized, fine on dvi0, but fullwidth & no only top panel (no black area visible on maximized (
yep htop still displays with count & vlc slider moving as music progresses even though screen has dimmed & m6502 screen saver is running on dvi0

i changed display orientation back to what it booted as (DVI0 on left, DVI1 just to right) and all maximize, minimize, menu showing & usable, etc issues were solved... it relates only to monitor.position and most people will have left-right I bet. (screensaver bug was unaltered! it still shows htop running dvi0 & htop running perfectly visible dvi1 but I've covered this in prior QA-test report. I restarted screensaver deamon (even changed from m6502 to another) & dvi0 is hidden, dvi1 perfectly visible.

logging out. check screensaver says 1 min, open two terms & have htop visible on both (one per display) & wait... -- nah still effecting screen. Alas I didn't test this before altering display.position...

description: updated
tags: removed: i386
Chris Guiver (guiverc) on 2019-02-18
summary: - lubuntu 19.04 qa-test daily x86 live -- screensaver hiding only laptop
- display (not external monitor)
+ lubuntu 19.04 qa-test daily x86 live -- screensaver hiding only primary
+ display (not secondary display)
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