[Bug 1767536] [NEW] Accessing the WIFI section of the "Settings" window causes massive freezes

[Slavic Dragovtev]

Public bug reported:

Accessing the Wi-Fi section of the "Settings" window causes huge, 5-20
seconds freezes of the window. Nothing else seems to freeze. One core's
utilization goes up during the freeze.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-control-center 1:3.28.1-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri Apr 27 17:23:34 2018
ExecutablePath: /usr/bin/gnome-control-center
InstallationDate: Installed on 2018-04-27 (0 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: gnome-control-center (Ubuntu)
Importance: Undecided
Status: New


** Tags: amd64 apport-bug bionic wayland-session

** Attachment added: "sometimes the freeze is accompanied by a "not responding" alert"
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Title:
Accessing the WIFI section of the "Settings" window causes massive
freezes

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[Sebastien Bacher]

Thank you for your bug report. Could you look in the system monitor what
is using the CPU while it freezes? Would also be useful to maybe get a
backtrace (http://wiki.ubuntu.com/DebuggingProgramCrash ) of the
processes while it's hanging

** Changed in: gnome-control-center (Ubuntu)
Importance: Undecided => Low

** Changed in: gnome-control-center (Ubuntu)
Status: New => Incomplete
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Title:
Accessing the WIFI section of the "Settings" window causes massive
freezes

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[Slavic Dragovtev]

As expected, it's gnome-control-center that is eating up the CPU. Note
that 25% equals precisely 100% of one core on my four core processor.

** Attachment added: "gnome-control-center in monitor"
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Title:
Accessing the WIFI section of the "Settings" window causes massive
freezes

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[Slavic Dragovtev]

As for the backtrace, will not do it on a production system, as it seems
to require quite a few dbg packages.
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Title:
Accessing the WIFI section of the "Settings" window causes massive
freezes

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[Sebastien Bacher]

well, if you can't install the dbg packages it's less useful but still
better than nothing
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Title:
Accessing the WIFI section of the "Settings" window causes massive
freezes

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[Matt Chapman]

Confirming I can reproduce this on my Dell Latitude E7470 in a clean
live-boot environment for Bionic. Attaching my backtrace.

** Attachment added: "gdb-program.txt"
https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/1767536/+attachment/5139933/+files/gdb-program.txt
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Title:
Accessing the WIFI section of the "Settings" window causes massive
freezes

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[Slavic Dragovtev]

** Changed in: gnome-control-center (Ubuntu)
Status: Incomplete => Confirmed
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Title:
Accessing the WIFI section of the "Settings" window causes massive
freezes

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