[Bug 1877695] [NEW] Hangs system: System Program Problem Detected

[whitis]

Public bug reported:

The System Program Problem Detected popup apparently causes system to hang.
You can't switch to a terminal.
You can't move a window.
You can't interact within windows.
Ctrl-alt-del took more than a minute to respond and then you have 30 seconds to answer cancel during which the system is also non-responsive.  

This is not the only popup that causes this.   The Program Not
Responding Wait or Force Quit dialog has the same effect.  It was
disabled entirely.   Ctrl-alt-del cancel method sometimes worked for
that one.

Appears to be related to grabbing mouse pointer.
xwininfo said it could not grab mouse pointer (probably because apport already grabbed it).

Actual dialog box was burried.
Window had no title bar, it was hidden under top bar (top bar set to autohide).   Showed "update-notifier" as program name.  Was able to quit from the pulldown menu on top bar.   After which, system became usable again.

Data was almost lost in seamonkey composer because of the difficulty
saving.  I was using firefox at the time of the problem.   Although
firefox's memory utilization had been quite high, I had killed tabs and
its memory usage was under 2GB.

ps ...

  1000 23538 23533  20   0 568668 149984 futex_ Sl  pts/0      0:14
/usr/bin/python3 /usr/share/apport/apport-gtk update-notifier

lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 18.04.4 LTS
Release:	18.04
Codename:	bionic

dpkg -l python3
ii  python3        3.6.7-1~18.0 amd64        interactive high-level object-ori


dpkg -l | fgrep -i python3 | fgrep -i gtk
ii  python3-aptdaemon.gtk3widgets                                    1.1.1+bzr982-0ubuntu19.2                        all          Python 3 GTK+ 3 widgets to run an aptdaemon client
ii  python3-gtkspellcheck                                            4.0.5-1                                         all          Python 3 spellchecking library for GTK+ based on Enchant


dpkg -l |fgrep -i python | wc
    818    9135  147661

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: update-notifier 3.192.1.7
ProcVersionSignature: Ubuntu 5.3.0-51.44~18.04.2-generic 5.3.18
Uname: Linux 5.3.0-51-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.14
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Fri May  8 20:20:07 2020
InstallationDate: Installed on 2019-05-02 (372 days ago)
InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: update-notifier
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: update-notifier (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug bionic

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https://bugs.launchpad.net/bugs/1877695

Title:
  Hangs system: System Program Problem Detected

Status in update-notifier package in Ubuntu:
  New

Bug description:
  The System Program Problem Detected popup apparently causes system to hang.
  You can't switch to a terminal.
  You can't move a window.
  You can't interact within windows.
  Ctrl-alt-del took more than a minute to respond and then you have 30 seconds to answer cancel during which the system is also non-responsive.  

  This is not the only popup that causes this.   The Program Not
  Responding Wait or Force Quit dialog has the same effect.  It was
  disabled entirely.   Ctrl-alt-del cancel method sometimes worked for
  that one.

  Appears to be related to grabbing mouse pointer.
  xwininfo said it could not grab mouse pointer (probably because apport already grabbed it).

  Actual dialog box was burried.
  Window had no title bar, it was hidden under top bar (top bar set to autohide).   Showed "update-notifier" as program name.  Was able to quit from the pulldown menu on top bar.   After which, system became usable again.

  Data was almost lost in seamonkey composer because of the difficulty
  saving.  I was using firefox at the time of the problem.   Although
  firefox's memory utilization had been quite high, I had killed tabs
  and its memory usage was under 2GB.

  ps ...

    1000 23538 23533  20   0 568668 149984 futex_ Sl  pts/0      0:14
  /usr/bin/python3 /usr/share/apport/apport-gtk update-notifier

  lsb_release -a
  No LSB modules are available.
  Distributor ID:	Ubuntu
  Description:	Ubuntu 18.04.4 LTS
  Release:	18.04
  Codename:	bionic

  dpkg -l python3
  ii  python3        3.6.7-1~18.0 amd64        interactive high-level object-ori

  
  dpkg -l | fgrep -i python3 | fgrep -i gtk
  ii  python3-aptdaemon.gtk3widgets                                    1.1.1+bzr982-0ubuntu19.2                        all          Python 3 GTK+ 3 widgets to run an aptdaemon client
  ii  python3-gtkspellcheck                                            4.0.5-1                                         all          Python 3 spellchecking library for GTK+ based on Enchant

  
  dpkg -l |fgrep -i python | wc
      818    9135  147661

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: update-notifier 3.192.1.7
  ProcVersionSignature: Ubuntu 5.3.0-51.44~18.04.2-generic 5.3.18
  Uname: Linux 5.3.0-51-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.14
  Architecture: amd64
  CurrentDesktop: ubuntu:GNOME
  Date: Fri May  8 20:20:07 2020
  InstallationDate: Installed on 2019-05-02 (372 days ago)
  InstallationMedia: Ubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: update-notifier
  UpgradeStatus: No upgrade log present (probably fresh install)

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