Public bug reported:
I set up two displays using the standard Xubuntu GUI. This worked
without issue.
When display compositing is disabled via "Window Manager Tweaks" I am
unable to move windows between displays. The windows exist on whichever
display is set to primary, and, while part of the widow may be rendered
on the other display, the titlebar is not able to cross the physical
monitor boundary through mouse dragging.
This phenomenon is easily reproducible.
Either this is an unknown bug hit only with the (non-default) option of
compositing turned off, or it is a known restriction of the compositor
implementation, in which case it presents a serious UX issue (since
there is no indication of the cause).
This is not an ongoing problem for me, since I'm happy to have
compositing enabled.
Please let me know if further debug is required.
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xubuntu-desktop 2.197
ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
Uname: Linux 4.2.0-16-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: XFCE
Date: Mon Nov 30 00:22:15 2015
InstallationDate: Installed on 2015-11-29 (0 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
SourcePackage: xubuntu-meta
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: xubuntu-meta (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug wily
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https://bugs.launchpad.net/bugs/1521018
Title:
Unable to move windows across displays without compositing
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