Public bug reported:
Every week since installing Xubuntu 16.04, it happens once that my
computer is locked but I can't move my mouse pointer more than about 80
pixels and I can't type anything in the password dialog.
The only way out of this lock is killing light-locker using the text
console (Ctrl+Alt+F2), logging in and then
me:~$ ps ax | grep lock
56 ? S< 0:00 [kblockd]
4124 tty2 S+ 0:00 grep --color=auto lock
9237 ? Sl 0:02 light-locker
me:~$ kill 9237
Currently, I have no clue what's the reason for this. It seems that the
pointer can move but is set back immediately to the original position
whenever I try to move it.
I have a very usual dual-screen setup and when it locks, the password
dialog normally is on the right screen while my left screen is the
primary one. I don't know if this is relevant.
I normally start my computer on monday and then this problem occurs
around wednesday.
me:~$ xrandr
Screen 0: minimum 320 x 200, current 3840 x 1200, maximum 16384 x 16384
DisplayPort-0 connected 1920x1200+0+0 (normal left inverted right x axis y
axis) 518mm x 324mm
1920x1200 59.95*+
DisplayPort-1 disconnected (normal left inverted right x axis y axis)
DVI-0 connected 1920x1200+1920+0 (normal left inverted right x axis y axis)
518mm x 324mm
1920x1200 59.95*+
For me, this problem is somehow security relevant because after applying
the work-around I have no locking anymore until shutting down.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: light-locker 1.7.0-2ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-22.40-generic 4.4.8
Uname: Linux 4.4.0-22-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: XFCE
Date: Wed Jun 8 09:28:13 2016
ExecutablePath: /usr/bin/light-locker
InstallationDate: Installed on 2016-02-17 (111 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
JournalErrors:
Error: command ['journalctl', '-b', '--priority=warning', '--lines=1000']
failed with exit code 1: Hint: You are currently not seeing messages from other
users and the system.
Users in the 'systemd-journal' group can see all messages. Pass -q to
turn off this notice.
No journal files were opened due to insufficient permissions.
SourcePackage: light-locker
UpgradeStatus: Upgraded to xenial on 2016-04-25 (43 days ago)
** Affects: light-locker (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug xenial
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https://bugs.launchpad.net/bugs/1590303
Title:
Mouse pointer trapped and keyboard not working
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