Not sure it's helpful to add all panel-like applications that are affected by this problem to the bugreport - unless of course you want to track which applications implemented the same workaround (which seems to be the only known workaround anyway - if you don't want to intercept X11's signals manually).
Let me formulate the bug more generally: All windows with coordinates of 0x0 have issues with xorg believing the cursor leaves the window because the lower boundaries are not clamped to integers. Instead the subpixel rendering of xinput2 results in those negative coordinates I mentioned before. I'm convinced *all* applications have this problem and I've discussed about the topic with the Gtk+ developers as well. One of the upstream bugreports even contains a small reproducer that is not a panel at all. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1795135 Title: XFCE window buttons are not clickable at the top of the screen Status in Plank: New Status in X.Org X server: Unknown Status in xfce4-panel package in Ubuntu: Confirmed 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) To manage notifications about this bug go to: https://bugs.launchpad.net/plank/+bug/1795135/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
