cannot click on others opened applications while the "application not responding" dialog is opened

[betteropensource]

[ Impact ]

The "application is not responding" can make the shell hang under X11

[ Test case ]

- Start an application (i.e. firefox)
- Stop the process
  killall -STOP firefox
- Close the window via the shell (using launcher right-click or window
  decoration button - if any - or using the activity view)
- After some moments and interactions with the window the gnome shell
  dialog to kill the window should pop-up
- The shell should be still responsive and you can get the program to
  run again (killall -CONT firefox)

[ Regression potential ]

Focus might be wrongly set to the applications or actors and instead be owned by the shell

This is uploaded under the gnome MRE, so the fix doesn't need to be explicitly verified. https://wiki.ubuntu.com/StableReleaseUpdates/GNOME

[Chris Guiver (guiverc)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:

apport-collect 1845302

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Launchpad Janitor (janitor)]

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

[Launchpad Janitor (janitor)]

This bug was fixed in the package mutter - 3.34.1+git20191022-2ubuntu1

---------------
mutter (3.34.1+git20191022-2ubuntu1) focal; urgency=medium

  * Merge with debian. Remaining changes:
    + debian/control:
      - Update VCS flags to point to launchpad
    + debian/gbp.conf: update branch to point to ubuntu/master
    + debian/patches/x11-Add-support-for-fractional-scaling-using-Randr.patch:
      - X11: Add support for fractional scaling using Randr

mutter (3.34.1+git20191022-2) unstable; urgency=medium

  * debian/patches: Update X11 focus before display focus:
    - Fixes an infinite loop causing an hang when showing the "application is
      not responding" dialog (LP: #1845302)

mutter (3.34.1+git20191022-1) unstable; urgency=medium

  * New upstream snapshot release
    + Fix night mode in wayland session (LP: #1847551)
    + Don't emit key-focus-out events on destroyed actors (LP: #1848119)
    + Fix an headers syntax error (LP: #1841709)
    + backends: Update inhibited state for the monitor and respect that state
    + clutter-backend-x11: Don't push keymap events to clutter
    + Fix drag and drop for applications in wayland
    + Avoid X11 roundtrips on underscanning checks

mutter (3.34.1-3) unstable; urgency=medium

  * Bump meson test timeout multiplier from 4 to 6 for armel

 -- Iain Lane <email address hidden> Fri, 25 Oct 2019 18:07:31 +0100

[Brian Murray (brian-murray)]

Hello betteropensource, or anyone else affected,

Accepted mutter into eoan-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/mutter/3.34.1+git20191107-1ubuntu1~19.10.1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested and change the tag from verification-needed-eoan to verification-done-eoan. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification-failed-eoan. In either case, without details of your testing we will not be able to proceed.

Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping!

N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days.

[Jaromir Obr (jaromir-obr)]

I can confirm the fix helped.

I verified it according to the steps in this bug (bug 1845302) and also according to the steps in bug 1850046 (its gnome-shell's part).

BTW when I run "killall -CONT firefox" (see the original description in this issue), the app is closed. I guess it's correct behavior because in the previous step I chosen "Quit" in the context menu of the app. If I don't choose "Quit", "killall -CONT firefox" continues running of the app as expected.

Used SW:
-----------
* Ubuntu 19.10
* mutter-common: 3.34.1+git20191107-1ubuntu1~19.10.1
* mutter: 3.34.1+git20191107-1ubuntu1~19.10.1
* gir1.2-mutter-5: 3.34.1+git20191107-1ubuntu1~19.10.1
* libmutter-5-0: 3.34.1+git20191107-1ubuntu1~19.10.1
* gnome-shell (gnome-shell-common): 3.34.1+git20191024-1ubuntu1~19.10.1

[Launchpad Janitor (janitor)]

This bug was fixed in the package mutter - 3.34.1+git20191107-1ubuntu1~19.10.1

---------------
mutter (3.34.1+git20191107-1ubuntu1~19.10.1) eoan; urgency=medium

  * Backport to eoan.
  * debian/control, debian/gbp.conf: Update VCS branch to ubuntu/eoan

mutter (3.34.1+git20191107-1ubuntu1) focal; urgency=medium

  * Merge with debian. Remaining changes:
    + debian/control:
      - Update VCS flags to point to launchpad
    + debian/gbp.conf: update branch to point to ubuntu/master
    + debian/patches/x11-Add-support-for-fractional-scaling-using-Randr.patch:
      - X11: Add support for fractional scaling using Randr

mutter (3.34.1+git20191107-1) unstable; urgency=high

  * New upstream snapshot
    - Fixes a regression from the previous upload, which caused a hang when
      interacting with the desktop icons.
  * x11-Update-X11-focus-before-updating-MetaDisplay-focus.patch: Drop. This
    was a cherrry-pick that is included in this snapshot.
  * debian/libmutter-5-0.symbols: Add new symbol in this snapshot

mutter (3.34.1+git20191022-2ubuntu1) focal; urgency=medium

  * Merge with debian. Remaining changes:
    + debian/control:
      - Update VCS flags to point to launchpad
    + debian/gbp.conf: update branch to point to ubuntu/master
    + debian/patches/x11-Add-support-for-fractional-scaling-using-Randr.patch:
      - X11: Add support for fractional scaling using Randr

mutter (3.34.1+git20191022-2) unstable; urgency=medium

  * debian/patches: Update X11 focus before display focus:
    - Fixes an infinite loop causing an hang when showing the "application is
      not responding" dialog (LP: #1845302)

mutter (3.34.1+git20191022-1) unstable; urgency=medium

  * New upstream snapshot release
    + Fix night mode in wayland session (LP: #1847551)
    + Don't emit key-focus-out events on destroyed actors (LP: #1848119)
    + Fix an headers syntax error (LP: #1841709)
    + backends: Update inhibited state for the monitor and respect that state
    + clutter-backend-x11: Don't push keymap events to clutter
    + Fix drag and drop for applications in wayland
    + Avoid X11 roundtrips on underscanning checks

mutter (3.34.1-3) unstable; urgency=medium

  * Bump meson test timeout multiplier from 4 to 6 for armel

 -- Iain Lane <email address hidden> Thu, 07 Nov 2019 12:23:49 +0000

[Łukasz Zemczak (sil2100)]

The verification of the Stable Release Update for mutter has completed successfully and the package is now being released to -updates. Subsequently, the Ubuntu Stable Release Updates Team is being unsubscribed and will not receive messages about this bug report. In the event that you encounter a regression using the package from -updates please report a new bug using ubuntu-bug and tag the bug report regression-update so we can easily find any regressions.