lxqt-panel: menu-button opens ~5.5cm above panel (on portrait display, normal on landscape..)

Bug #1810075 reported by Chris Guiver on 2018-12-30
This bug affects 1 person
Affects Status Importance Assigned to Milestone
lxqt-panel (Ubuntu)

Bug Description

Lubuntu 19.04 daily image ISO QA-testing

I noticed this problem on debian (testing) and so tested it I get the same issue here on Lubuntu

Two displays - left is landscape orientation, right is portrait.
I add extra panel on right (portrait) monitor @ bottom, add a few widgets including menu

Click menu-icon (bottom right of display; LXQt bird) and the menu is drawn ~5.5cm above the panel with the gap below it being filled with currently firefox (where I'm typing this). I have the same issue with [installed] Debian [testing/sid] & Ubuntu.

It does NOT effect operation; just not ideal.
I tried various positions of panel, at any position on landscape oriented display it opens as expected, on portrait oriented display it only misbehaves at the bottom.

The following is as reported on debian (#916105)
My system is dell 755 (optiplex) with two displays, one landscape & one

I've added two panels, one at bottom of each display.

If I open (click) menu on landscape monitor, behavior is expected.

If I open (click) menu on portrait monitor, I'd expect menu to open
just above panel, but it opens with ~5.5cm gap between panel & bottom of
displayed menu.

The gap between panel (at bottom of display) & menu contains the normal
background (be it wallpaper, terminal, browser, or file manager). Menu
works naturally, but having to move mouse further up ~5.5cm isn't ideal.

(I tried taking screenshot, but menu would disappear on touch of keys to
take image & I'd not get the menu appearing sorry)

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: lxqt-panel 0.13.0-0ubuntu5
ProcVersionSignature: Ubuntu 4.18.0-11.12-generic 4.18.12
Uname: Linux 4.18.0-11-generic x86_64
ApportVersion: 2.20.10-0ubuntu14
Architecture: amd64
CasperVersion: 1.401
CurrentDesktop: LXQt
Date: Sun Dec 30 08:42:50 2018
LiveMediaBuild: Lubuntu 19.04 "Disco Dingo" - Alpha amd64 (20181229)
SourcePackage: lxqt-panel
UpgradeStatus: No upgrade log present (probably fresh install)

Chris Guiver (guiverc) wrote :
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 :

Could be related - https://bugs.launchpad.net/ubuntu/+source/lxqt-panel/+bug/1810079
Both are menu's not appearing where expected (just not the same place)

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