Apps with HeaderBar have margin outside window

[INIZAN yannick]

Distribution: Xubuntu 16.04
Gtk Version: 3.18.5

All applications with GtkHeaderBar have margin outside window.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Sebastien Bacher (seb128)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue you are reporting is an upstream one and it would be nice if somebody having it could send the bug to the developers of the software by following the instructions at https://wiki.ubuntu.com/Bugs/Upstream/GNOME. If you have done so, please tell us the number of the upstream bug (or the link), so we can add a bugwatch that will inform us about its status. Thanks in advance.

[INIZAN yannick (inizan-yannick)]

bug filled @ bugzilla.gnome.org : https://bugzilla.gnome.org/show_bug.cgi?id=758526

[Sebastien Bacher (seb128)]

Thanks

[Tim Lunn (darkxst)]

This also affects gnome-shell/adwaita, and even Unity, although its less obvious in the latter and just occurs as white corners where the headerbar corners are rounded.

Its a regression from the fix in bug 1515561

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1518661

[INIZAN yannick (inizan-yannick)]

3.19.* version doesn't have this bug. (tested with this PPA : https://launchpad.net/~ricotz/+archive/ubuntu/testing)

[b3nmore (b3nmore)]

Version 3.18.5-1ubuntu2 from proposed fixes this issue partially. In order to work, the window manager needs to support compositing, otherwise we now get a black margin outside the window (cf. attached screenshot).

[Khurshid Alam (khurshid-alam)]

No it doesn't. The issue still exits on 3.18.6-1ubuntu1. On Unity, now it has black corner (visible with radiance). Although, squared cornered themes like Numix doesn't have this issue.