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 <seb...@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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