Window freezes on desktop -> right-click -> menu -> desktop parameters

[Stéphane Gourichon]

# Context

* Xubuntu 16.04 running XFCE.
* Rebooted after seeing some X driver update. Machine is laptop with "Optimus" hardware (Intel+NVidia combo).

# Steps to reproduce

* On desktop, right-click then choose "desktop parameters"
* A window appears.

# Expected

* window with complete and correct layout as usual
* window reacts to clicks
* little or no CPU consumed when window idle

# Observed

* window with incomplete/incorrect layout. See attached screenshot with red annotations.
* window frozen, click do nothing
* 100% one one core eaten up
* stace reveals continuous calls to brk()

Thank you for your attention.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xfdesktop4 4.12.3-2ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-12.28-generic 4.4.4
Uname: Linux 4.4.0-12-generic x86_64
ApportVersion: 2.20-0ubuntu3
Architecture: amd64
CurrentDesktop: XFCE
Date: Mon Mar 14 14:22:51 2016
ExecutablePath: /usr/bin/xfdesktop-settings
InstallationDate: Installed on 2016-02-03 (39 days ago)
InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Alpha amd64 (20160203)
ProcEnviron:
 LANGUAGE=fr_FR
 PATH=(custom, user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
SourcePackage: xfdesktop4
UpgradeStatus: No upgrade log present (probably fresh install)

[Theo Linkspfeifer (lastonestanding)]

Does this bug affect the final release of 16.04 or 18.04 also?

[Launchpad Janitor (janitor)]

[Expired for xfdesktop4 (Ubuntu) because there has been no activity for 60 days.]

[Stéphane Gourichon (stephane-gourichon-lpad)]

Bug not observed again.