I have written a patch that employs the only known/reasonable workaround
so far for the issue within xorg:
https://git.xfce.org/xfce/xfce4-panel/commit/?id=e56e8699e271cea209f5b283421952d9035ad2b5
This commit could be pulled into Ubuntu at very low risk.
** Also affects: xfce4-panel (Ubuntu)
Importance: Undecided
Status: New
** Changed in: xfce4-panel (Ubuntu)
Assignee: (unassigned) => Simon Steinbeiß (ochosi)
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https://bugs.launchpad.net/bugs/1795135
Title:
Window buttons are not clickable at the top of the screen
Status in X.Org X server:
Unknown
Status in xfce4-panel package in Ubuntu:
New
Status in xorg-server package in Ubuntu:
Confirmed
Bug description:
This bug affects greybird-gtk-theme and xfce4-panel in Xubuntu Cosmic.
With Cosmic, it is not possible to click on the window buttons after
moving the mouse cursor to the top of the screen. Unlike similar bugs,
no amount of moving left or right triggers the hover event or the
ability to click on the window button.
With Adwaita and Numix, we see the same issues we see elsewhere, where
the buttons can sometimes be clicked, but also have issue with the
topmost part of the screen.
ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: greybird-gtk-theme 3.22.9-0ubuntu1
ProcVersionSignature: Ubuntu 4.18.0-7.8-generic 4.18.5
Uname: Linux 4.18.0-7-generic x86_64
ApportVersion: 2.20.10-0ubuntu11
Architecture: amd64
CurrentDesktop: XFCE
Date: Sat Sep 29 09:05:24 2018
InstallationDate: Installed on 2018-09-29 (0 days ago)
InstallationMedia: Xubuntu 18.10 "Cosmic Cuttlefish" - Beta amd64 (20180929)
PackageArchitecture: all
SourcePackage: greybird-gtk-theme
UpgradeStatus: No upgrade log present (probably fresh install)
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