[Bug 1782320] Re: Braille display inoperable in GUI since polkit-update

[Launchpad Bug Tracker]

This bug was fixed in the package brltty - 5.6-5ubuntu1

---------------
brltty (5.6-5ubuntu1) cosmic; urgency=medium

  * Merged fixes from Debian, including the patch to work with the
    current polkit version (lp: #1782320)

brltty (5.6-5) unstable; urgency=medium

  * patches/atspi2-shutdown: Automatically shut down brltty on session shut
    down.
  * control: Bump Standards-Version to 4.1.5 (no changes).
  * control: Mark python-brlapi and python3-brlapi Multi-Arch: same.
  * patches/policykit-fix: Fix polkit authentication (Closes: #905058).

 -- Sebastien Bacher <seb128 at ubuntu.com>  Wed, 29 Aug 2018 09:46:17
+0200

** Changed in: brltty (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1782320

Title:
  Braille display inoperable in GUI since polkit-update

Status in brltty package in Ubuntu:
  Fix Released
Status in brltty source package in Bionic:
  Fix Committed

Bug description:
  * Impact

  Since the fix for CVE-2018-1116 in policykit-1 the braille display
  doesn't work in graphical UIs

  * Test case
  Log into an Ubuntu/GNOME session and activate the braille display

  * Regression potential
  The braille display should keep working on the command line and in graphical sessions

  ------------------

  
  $ lsb_release -rd
  Description:	Ubuntu 18.04 LTS
  Release:	18.04

  $ apt-cache policy brltty
  brltty:
    Installed: 5.5-4ubuntu2
    Candidate: 5.5-4ubuntu2
    Version table:
   *** 5.5-4ubuntu2 500
          500 http://nl.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
          100 /var/lib/dpkg/status

  $ apt-cache policy policykit-1-gnome
  policykit-1-gnome:
    Installed: (none)
    Candidate: 0.105-6ubuntu2
    Version table:
       0.105-6ubuntu2 500
          500 http://nl.archive.ubuntu.com/ubuntu bionic/main amd64 Packages

  Expected behavior:
  After a system upgrade, the braille display should function as before the upgrade.

  Actual behavior:
  Since the upgrade, the braille display only works in console mode (Ctrl+Alt+F3, -F4, etc.)
  In GUI mode, the display reads "Screen not in text mode".
  Restarting Orca (screenreader) has no effect. Restarting the system has no effect.

  This is the upgrade command, taken from /var/log/apt/history.log:
  Start-Date: 2018-07-17  07:47:02
  Commandline: /usr/bin/unattended-upgrade
  Upgrade: libpolkit-gobject-1-0:amd64 (0.105-20, 0.105-20ubuntu0.18.04.1), libpolkit-agent-1-0:amd64 (0.105-20, 0.105-20ubuntu0.18.04.1), libpolkit-backend-1-0:amd64 (0.105-20, 0.105-20ubuntu0.18.04.1), policykit-1:amd64 (0.105-20, 0.105-20ubuntu0.18.04.1), gir1.2-polkit-1.0:amd64 (0.105-20, 0.105-20ubuntu0.18.04.1)
  End-Date: 2018-07-17  07:47:04

  These are the error messages taken from /var/log/syslog:
  Jul 18 10:55:34 WaanzinsPC2 brltty[2635]: polkit_authority_check_authorization_sync error 11: Resource temporarily unavailable.
  Jul 18 10:55:34 WaanzinsPC2 brltty[2635]: brltty: polkit_authority_check_authorization_sync error 11: Resource temporarily unavailable.
  Jul 18 10:55:34 WaanzinsPC2 brltty[2635]: BrlAPI connection fd=22 accepted: local <unnamed>
  Jul 18 10:55:34 WaanzinsPC2 brltty[2635]: brltty: BrlAPI connection fd=22 accepted: local <unnamed>
  Jul 18 10:55:34 WaanzinsPC2 brltty[2635]: polkit_authority_check_authorization_sync error 11: Resource temporarily unavailable.
  Jul 18 10:55:34 WaanzinsPC2 brltty[2635]: brltty: polkit_authority_check_authorization_sync error 11: Resource temporarily unavailable.
  Jul 18 10:55:34 WaanzinsPC2 brltty[2635]: BrlAPI connection fd=22 accepted: local <unnamed>
  Jul 18 10:55:34 WaanzinsPC2 brltty[2635]: brltty: BrlAPI connection fd=22 accepted: local <unnamed>
  Jul 18 10:55:34 WaanzinsPC2 brltty[2635]: polkit_authority_check_authorization_sync error 11: Resource temporarily unavailable.
  Jul 18 10:55:34 WaanzinsPC2 brltty[2635]: brltty: polkit_authority_check_authorization_sync error 11: Resource temporarily unavailable.
  Jul 18 10:55:34 WaanzinsPC2 brltty[2635]: BrlAPI connection fd=22 accepted: local <unnamed>
  Jul 18 10:55:34 WaanzinsPC2 brltty[2635]: brltty: BrlAPI connection fd=22 accepted: local <unnamed>
  Jul 18 10:55:34 WaanzinsPC2 brltty[2635]: polkit_authority_check_authorization_sync error 11: Resource temporarily unavailable.
  Jul 18 10:55:34 WaanzinsPC2 brltty[2635]: brltty: polkit_authority_check_authorization_sync error 11: Resource temporarily unavailable.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: brltty 5.5-4ubuntu2
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  Date: Wed Jul 18 11:03:27 2018
  ExecutablePath: /bin/brltty
  InstallationDate: Installed on 2018-05-15 (63 days ago)
  InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  LocalLibraries: /usr/local/lib/libgpg-error.so.0.24.2 /usr/local/lib/libgcrypt.so.20.2.2
  SourcePackage: brltty
  UpgradeStatus: No upgrade log present (probably fresh install)
  mtime.conffile..etc.brltty.conf: 2018-05-16T09:36:35.497752

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