gnome-control-center crashes after launch

[Mark Smith]

I had successfully opened settings and used it to change some of the desktop options (size of the docker icons, etc.).
Then I clicked on "Users" and ubuntu-settings crashed.
Since then, I am unable to open ubuntu-settings - it will open and flash up on the screen before crashing.
This has continued even after restarting the machine a few times.

ubuntu-settings version: 23.04.2 500

ProblemType: Bug
DistroRelease: Ubuntu 23.04
Package: ubuntu-settings 23.04.2
ProcVersionSignature: Ubuntu 6.1.0-16.16-generic 6.1.6
Uname: Linux 6.1.0-16-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.26.0-0ubuntu2
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sat Mar 11 18:33:16 2023
InstallationDate: Installed on 2023-03-11 (0 days ago)
InstallationMedia: Ubuntu 23.04 "Lunar Lobster" - Alpha amd64 (20230310)
PackageArchitecture: all
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
SourcePackage: ubuntu-settings
UpgradeStatus: No upgrade log present (probably fresh install)

[Gunnar Hjalmarsson (gunnarhj)]

Thanks for your report! I see the same thing when trying to switch to the Users panel with gnome-control-center 1:44~alpha-0ubuntu1, but the issue seems not to be present in the coming version 1:44~rc-1ubuntu1. So stay tuned. :)

[Gunnar Hjalmarsson (gunnarhj)]

Btw, you can run this terminal command:

gsettings reset org.gnome.ControlCenter last-panel

and then you should be able to successfully open Settings. But avoid "Users" for now.

[Mark Smith (juglugs1974)]

As a data point, when I run gnome-control-center from the terminal I get a "Segmentation Error" and core dump.

[Mark Smith (juglugs1974)]

That command:

gsettings reset org.gnome.ControlCenter last-panel

Doesn't work for me - I get:

No such schema “org.gnome.ControlCenter”

But I was able to use dconf-editor to set the value of org.gnome.ControlCenter last-panel to ''

[Gunnar Hjalmarsson (gunnarhj)]

Sorry, I was on Ubuntu 22.04 when testing that command, but they seem to have changed the schema name. On 23.04 this would have worked:

gsettings reset org.gnome.Settings last-panel

[starkus (starkus)]

I can browse the control-center with resetting the last-panel. When opening "Users" it tells `WARNING: Couldn't get locale for language: (null) Speicherzugriffsfehler (Speicherabzug geschrieben)`.
The first thing I realized was that the "Users" section was totally empty. Afterwards gnome-control-center crashed. When adding a new User via command line I could browse the open "Users" tab and the new and the old user were present. After a reboot it was empty again.

[Gunnar Hjalmarsson (gunnarhj)]

Yeah.. That "Couldn't get locale for language: (null)" warning comes from a patch which I wrote initially, and first I feared that the segfault is related to that. But it's not. I committed a fix which will get rid of the warning in this situation:

https://salsa.debian.org/gnome-team/gnome-control-center/-/commit/53e9a9a2

But it still segfaults. For some reason it fails to fetch the user data properly.

My thought is that since the problem seems to be gone in g-c-c 1:44~rc, it's not worth it to figure out why exactly the alpha version crashes.

[Mark Smith (juglugs1974)]

Yeah, I think that it's not worth fixing in the alpha version.
Do you know when 1:44~rc will be merged?

Thank you for your help with this bug! It is much appreciated :)

On Sun, 12 Mar 2023 at 22:00, Gunnar Hjalmarsson <email address hidden>
wrote:

> Yeah.. That "Couldn't get locale for language: (null)" warning comes
> from a patch which I wrote initially, and first I feared that the
> segfault is related to that. But it's not. I committed a fix which will
> get rid of the warning in this situation:
>
> https://salsa.debian.org/gnome-team/gnome-control-
> center/-/commit/53e9a9a2
>
> But it still segfaults. For some reason it fails to fetch the user data
> properly.
>
> My thought is that since the problem seems to be gone in g-c-c 1:44~rc,
> it's not worth it to figure out why exactly the alpha version crashes.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/2011313
>
> Title:
> gnome-control-center crashes after launch
>
> Status in gnome-control-center package in Ubuntu:
> In Progress
>
> Bug description:
> I had successfully opened settings and used it to change some of the
> desktop options (size of the docker icons, etc.).
> Then I clicked on "Users" and ubuntu-settings crashed.
> Since then, I am unable to open ubuntu-settings - it will open and flash
> up on the screen before crashing.
> This has continued even after restarting the machine a few times.
>
> ubuntu-settings version: 23.04.2 500
>
> ProblemType: Bug
> DistroRelease: Ubuntu 23.04
> Package: ubuntu-settings 23.04.2
> ProcVersionSignature: Ubuntu 6.1.0-16.16-generic 6.1.6
> Uname: Linux 6.1.0-16-generic x86_64
> NonfreeKernelModules: nvidia_modeset nvidia
> ApportVersion: 2.26.0-0ubuntu2
> Architecture: amd64
> CasperMD5CheckResult: pass
> CurrentDesktop: ubuntu:GNOME
> Date: Sat Mar 11 18:33:16 2023
> InstallationDate: Installed on 2023-03-11 (0 days ago)
> InstallationMedia: Ubuntu 23.04 "Lunar Lobster" - Alpha amd64 (20230310)
> PackageArchitecture: all
> ProcEnviron:
> LANG=en_US.UTF-8
> PATH=(custom, no user)
> SHELL=/bin/bash
> TERM=xterm-256color
> XDG_RUNTIME_DIR=<set>
> SourcePackage: ubuntu-settings
> UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/2011313/+subscriptions
>
> Launchpad-Notification-Type: bug
> Launchpad-Bug: distribution=ubuntu; sourcepackage=gnome-control-center;
> component=main; status=In Progress; importance=High; assignee=
> <email address hidden>;
> Launchpad-Bug-Tags: amd64 apport-bug lunar
> Launchpad-Bug-Information-Type: Public
> Launchpad-Bug-Private: no
> Launchpad-Bug-Security-Vulnerability: no
> Launchpad-Bug-Commenters: gunnarhj juglugs1974 starkus
> Launchpad-Bug-Reporter: Mark Smith (juglugs1974)
> Launchpad-Bug-Modifier: Gunnar Hjalmarsson (gunnarhj)
> Launchpad-Message-Rationale: Subscriber
> Launchpad-Message-For: juglugs1974
>
>

[Gunnar Hjalmarsson (gunnarhj)]

On 2023-03-13 07:52, Mark Smith wrote:
> Do you know when 1:44~rc will be merged?

It has already been merged into the repo. Refreshing one or two patches remains. I would guess it will be uploaded to lunar very soon.

[Mark Smith (juglugs1974)]

Ahaha so ubuntu-settings was rolled out into Lunar overnight NOT gnome-control-settings.
I had forgotten that I had originally tagged the wrong app - in fact, I'm not going to have to go and look up the difference between them :)

So - false alarm - It's not ready yet :)

[Francois Thirioux (fthx)]

https://bugs.launchpad.net/ubuntu/+source/language-pack-fr/+bug/2011347

[Gunnar Hjalmarsson (gunnarhj)]

g-c-c 1:44~rc-1ubuntu1 has migrated to lunar-release.

[Mark Smith (juglugs1974)]

Awesome! Thank you for your help on this.

[Mark Smith (juglugs1974)]

I can confirm that this issue is now resolved

On Thu, 16 Mar 2023 at 12:15, Mark Smith <email address hidden> wrote:

> Awesome! Thank you for your help on this.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/2011313
>
> Title:
> gnome-control-center crashes after launch
>
> Status in gnome-control-center package in Ubuntu:
> Fix Released
>
> Bug description:
> I had successfully opened settings and used it to change some of the
> desktop options (size of the docker icons, etc.).
> Then I clicked on "Users" and ubuntu-settings crashed.
> Since then, I am unable to open ubuntu-settings - it will open and flash
> up on the screen before crashing.
> This has continued even after restarting the machine a few times.
>
> ubuntu-settings version: 23.04.2 500
>
> ProblemType: Bug
> DistroRelease: Ubuntu 23.04
> Package: ubuntu-settings 23.04.2
> ProcVersionSignature: Ubuntu 6.1.0-16.16-generic 6.1.6
> Uname: Linux 6.1.0-16-generic x86_64
> NonfreeKernelModules: nvidia_modeset nvidia
> ApportVersion: 2.26.0-0ubuntu2
> Architecture: amd64
> CasperMD5CheckResult: pass
> CurrentDesktop: ubuntu:GNOME
> Date: Sat Mar 11 18:33:16 2023
> InstallationDate: Installed on 2023-03-11 (0 days ago)
> InstallationMedia: Ubuntu 23.04 "Lunar Lobster" - Alpha amd64 (20230310)
> PackageArchitecture: all
> ProcEnviron:
> LANG=en_US.UTF-8
> PATH=(custom, no user)
> SHELL=/bin/bash
> TERM=xterm-256color
> XDG_RUNTIME_DIR=<set>
> SourcePackage: ubuntu-settings
> UpgradeStatus: No upgrade log present (probably fresh install)
>
> To manage notifications about this bug go to:
>
> https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/2011313/+subscriptions
>
> Launchpad-Notification-Type: bug
> Launchpad-Bug: distribution=ubuntu; sourcepackage=gnome-control-center;
> component=main; status=Fix Released; importance=High; assignee=
> <email address hidden>;
> Launchpad-Bug-Tags: amd64 apport-bug lunar
> Launchpad-Bug-Information-Type: Public
> Launchpad-Bug-Private: no
> Launchpad-Bug-Security-Vulnerability: no
> Launchpad-Bug-Commenters: fthx gunnarhj juglugs1974 starkus
> Launchpad-Bug-Reporter: Mark Smith (juglugs1974)
> Launchpad-Bug-Modifier: Mark Smith (juglugs1974)
> Launchpad-Message-Rationale: Subscriber
> Launchpad-Message-For: juglugs1974
>
>

[Gunnar Hjalmarsson (gunnarhj)]

Thanks for your follow-up, Mark!