Copy a screenshot of an area to clipboard prevents mouse click if used on modal UI elements

[ambroisemaupate]

Steps to reproduce:
-------------------

- Register a keyboard shortcut to trigger a "Copy a screenshot of an area to clipboard", i.e Shift+Ctrl+$
- Keyboard shortcut works fine and your mouse cursor becomes a cross-hair
- Now open, for example, a selectbox in Firefox Application, or any UI item capturing mouse and try to trigger a screenshot in this state: for example, try to screenshot your active Application menu dropdown (Application > File > Save)…
- At this moment, screenshot utility won’t change your mouse pointer into a crosshair and a bug occurs which prevents gnome-shell to respond to any mouse-click: I can’t click anymore on Dock icons, top bar actions and can’t click on Applications which are not in focus (I have to use Super+Tab to give focus to other applications)
- However, mouse "hover" is still captured by applications (I can see UI tooltips appearing) but I can’t click anymore

For the moment, the only way to recover my mouse click is to reboot Ubuntu or restart gdm3 service.

Description: Ubuntu 20.04 LTS
Release: 20.04

gdm3:
  Installed: 3.34.1-1ubuntu1
  Candidate: 3.34.1-1ubuntu1
  Version table:
 *** 3.34.1-1ubuntu1 500
        500 http://fr.archive.ubuntu.com/ubuntu focal/main amd64 Packages
        100 /var/lib/dpkg/status

gnome-shell:
  Installed: 3.36.1-5ubuntu1
  Candidate: 3.36.1-5ubuntu1
  Version table:
 *** 3.36.1-5ubuntu1 500
        500 http://fr.archive.ubuntu.com/ubuntu focal/main amd64 Packages
        100 /var/lib/dpkg/status

gnome-screenshot:
  Installed: 3.36.0-1ubuntu1
  Candidate: 3.36.0-1ubuntu1
  Version table:
 *** 3.36.0-1ubuntu1 500
        500 http://fr.archive.ubuntu.com/ubuntu focal/main amd64 Packages
        100 /var/lib/dpkg/status

What you expected to happen:
----------------------------

Area screenshot should be saved into clipboard, even if a UI dropdown menu /selectbox element is activated (select-box, button, application top-menu bar…)

What happened instead:
----------------------

Screenshot utility freezes and makes all gnome-shell unclickable

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/1874288/+editstatus and add the package name in the text box next to the word Package.

[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]

[ambroisemaupate (ambroisemaupate)]

Do you need more information to reproduce this bug?

[Daniel van Vugt (vanvugt)]

You might get a faster response if you report it also to the developers here:

  https://gitlab.gnome.org/GNOME/gnome-shell/-/issues