[Bug 1860245] [NEW] User cannot always scroll to the bottom of the software updater window, last update package(s) inaccessible

[spike speigel]

Public bug reported:

The user cannot always scroll to the bottom of the software updater
window.  The scroll bar stops before actually reaching the bottom, and
prevents the last listed package or group of packages from being viewed.
This seems to happen only sometimes.  Not exactly sure what caused the
scroll bar hangup one moment and then it functioning fine the next.

Attaching screenshots of the scroll bar working and stuck (movable, but
not able to reach the bottom.)

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: update-manager 1:19.04.8
ProcVersionSignature: Ubuntu 5.4.0-9.12-generic 5.4.3
Uname: Linux 5.4.0-9-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu15
Architecture: amd64
CurrentDesktop: XFCE
Date: Sat Jan 18 18:20:40 2020
ExecutablePath: /usr/bin/update-manager
InstallationDate: Installed on 2019-03-07 (317 days ago)
InstallationMedia: Xubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.2)
InterpreterPath: /usr/bin/python3.7
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Python3Details: /usr/bin/python3.7, Python 3.7.6, python3-minimal, 3.7.5-1ubuntu1
PythonDetails: /usr/bin/python2.7, Python 2.7.17, python-minimal, 2.7.17-1
SourcePackage: update-manager
UpgradeStatus: Upgraded to focal on 2020-01-10 (8 days ago)

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


** Tags: amd64 apport-bug focal

** Attachment added: "Stuck scroll bar"
   https://bugs.launchpad.net/bugs/1860245/+attachment/5321471/+files/Screenshot_2020-01-18_18-16-23.png

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https://bugs.launchpad.net/bugs/1860245

Title:
  User cannot always scroll to the bottom of the software updater
  window, last update package(s) inaccessible

Status in update-manager package in Ubuntu:
  New

Bug description:
  The user cannot always scroll to the bottom of the software updater
  window.  The scroll bar stops before actually reaching the bottom, and
  prevents the last listed package or group of packages from being
  viewed.  This seems to happen only sometimes.  Not exactly sure what
  caused the scroll bar hangup one moment and then it functioning fine
  the next.

  Attaching screenshots of the scroll bar working and stuck (movable,
  but not able to reach the bottom.)

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: update-manager 1:19.04.8
  ProcVersionSignature: Ubuntu 5.4.0-9.12-generic 5.4.3
  Uname: Linux 5.4.0-9-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu15
  Architecture: amd64
  CurrentDesktop: XFCE
  Date: Sat Jan 18 18:20:40 2020
  ExecutablePath: /usr/bin/update-manager
  InstallationDate: Installed on 2019-03-07 (317 days ago)
  InstallationMedia: Xubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.2)
  InterpreterPath: /usr/bin/python3.7
  PackageArchitecture: all
  ProcEnviron:
   LANGUAGE=en_US
   PATH=(custom, user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  Python3Details: /usr/bin/python3.7, Python 3.7.6, python3-minimal, 3.7.5-1ubuntu1
  PythonDetails: /usr/bin/python2.7, Python 2.7.17, python-minimal, 2.7.17-1
  SourcePackage: update-manager
  UpgradeStatus: Upgraded to focal on 2020-01-10 (8 days ago)

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