This bug was fixed in the package unity - 7.4.5+16.04.20190312-0ubuntu1
---
unity (7.4.5+16.04.20190312-0ubuntu1) xenial; urgency=medium
* lockscreen: cancel authentication if externally unlocked (LP:
#1733557)
-- Andrea Azzarone Tue, 12 Mar 2019
17:54:13 +
--
You
This bug was fixed in the package unity - 7.5.0+18.04.20190304-0ubuntu1
---
unity (7.5.0+18.04.20190304-0ubuntu1) bionic; urgency=medium
* lockscreen: cancel authentication if externally unlocked (LP:
#1733557)
-- Andrea Azzarone Mon, 04 Mar 2019
11:03:45 +
** Changed
I can no longer reproduce the issue in bionic installing unity from proposed
7.5.0+18.04.20190304-0ubuntu1. Please note that if you're running gdm3 in order
to reproduce (or not reproduce) the problem you need the follow steps:
1. Lock the screen
2. Switch to gdm using ctrl + alt + f1
3. Use
I can no longer reproduce the issue in xenial installing unity from
proposed (7.4.5+16.04.20190312-0ubuntu1).
** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial
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Unsubscribing the sponsors team, as there is nothing left to sponsor.
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Title:
Login screen showing Authentication Failure Switch to greeter...
I have accepted Andrea's fixes to both xenial-proposed and bionic-
proposed - could you please perform validation? Thank you!
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Title:
Login
Hello Andrew, or anyone else affected,
Accepted unity into xenial-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/unity/7.4.5+16.04.20190312-0ubuntu1
in a few hours, and then in the -proposed repository.
Please help us by testing this new package.
Hello Andrew, or anyone else affected,
Accepted unity into bionic-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/unity/7.5.0+18.04.20190304-0ubuntu1
in a few hours, and then in the -proposed repository.
Please help us by testing this new package.
I've started seeing this bug in Ubuntu 16.04 recently.
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Title:
Login screen showing Authentication Failure Switch to greeter...
To manage
@sil2100 Any chance we get a build for Xenial and Bionic?
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Title:
Login screen showing Authentication Failure Switch to greeter...
To manage
This bug was fixed in the package unity - 7.5.0+18.10.20190304-0ubuntu1
---
unity (7.5.0+18.10.20190304-0ubuntu1) cosmic; urgency=medium
* lockscreen: cancel authentication if externally unlocked (LP:
#1733557)
-- Andrea Azzarone Mon, 04 Mar 2019
11:03:23 +
** Changed
I can no longer reproduce the problem in Cosmic following the steps in
[Test Case]. I'm running Unity 7.5.0+18.10.20190304-0ubuntu1. Marking as
verification-done.
** Tags removed: verification-needed verification-needed-cosmic
** Tags added: verification-done verification-done-cosmic
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** Changed in: unity (Ubuntu Bionic)
Status: Confirmed => In Progress
** Changed in: unity (Ubuntu Xenial)
Status: New => In Progress
** Changed in: unity (Ubuntu Xenial)
Assignee: (unassigned) => Andrea Azzarone (azzar1)
** Changed in: unity (Ubuntu Bionic)
Assignee:
** Changed in: unity (Ubuntu Bionic)
Status: New => Confirmed
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Title:
Login screen showing Authentication Failure Switch to greeter...
** Tags added: lockscreen
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Title:
Login screen showing Authentication Failure Switch to greeter...
To manage notifications about this bug go
** Description changed:
- When I lock my machine, the login screen shows my current user with the
- message: "Authentication Failure"
+ [Impact]
- ..and in the position when the password normally exists, the option
- "Switch to greeter..."
+ After locking, the login screen shows the message
** Changed in: unity (Ubuntu Cosmic)
Importance: Undecided => Medium
** Tags removed: 16.04 17.10
** Also affects: unity (Ubuntu Bionic)
Importance: Undecided
Status: New
** Also affects: unity (Ubuntu Xenial)
Importance: Undecided
Status: New
** Changed in: unity
That's great news! Does it mean it will be backported into bionic after
it will be accepted from proposed? Is there a way to enable proposed for
18.04?
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Hello Andrew, or anyone else affected,
Accepted unity into cosmic-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/unity/7.5.0+18.10.20190304-0ubuntu1
in a few hours, and then in the -proposed repository.
Please help us by testing this new package.
A friendly reminder it affects 16.04 too (aside 18.04 and 18.10).
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Title:
Login screen showing Authentication Failure Switch to greeter...
To
Perfect! Is it backported to 18.04 and 18.10?
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Title:
Login screen showing Authentication Failure Switch to greeter...
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This bug was fixed in the package unity - 7.5.0+19.04.20190217-0ubuntu1
---
unity (7.5.0+19.04.20190217-0ubuntu1) disco; urgency=medium
[ Andrea Azzarone ]
* locksreen: cancel authentication if externally unlocked (LP:
#1733557)
-- Dmitry Shachnev Sun, 17 Feb 2019
@c4pp4 because of other issues I had in my system (Firefox acting weird
with recent 64 and 65 releases on 18.10) i rolled back to 18.04 (using
LVM and backups) and installed your PPA - it also solved my long lasting
issue with multiple logged-in accounts. Thanks!
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@c4pp4 Than you for the trouble. I installed your PPA and after update I
can confirm the patch solved my issue. I no longer see "authentication
failure" dialog. Unity 7.5.0 on Ubuntu 18.10
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** Merge proposal linked:
https://code.launchpad.net/~azzar1/unity/+git/unity/+merge/363124
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Title:
Login screen showing Authentication
** Changed in: unity (Ubuntu)
Assignee: (unassigned) => Andrea Azzarone (azzar1)
** No longer affects: unity
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Title:
Login screen showing
** Changed in: unity (Ubuntu)
Importance: Undecided => Medium
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Title:
Login screen showing Authentication Failure Switch to greeter...
To
Submitted
https://code.launchpad.net/~andrew.sh/unity/+git/unity/+merge/362414.
** Merge proposal linked:
https://code.launchpad.net/~andrew.sh/unity/+git/unity/+merge/362414
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@Krzysztof Ostaszewski
As you wish, it's ready now.
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Title:
Login screen showing Authentication Failure Switch to greeter...
To manage
@c4pp4 any chance providing a ppa for cosmic?
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Title:
Login screen showing Authentication Failure Switch to greeter...
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@Rael
As of now Unityshell compiz plugin is crashing in disco (bug 1812964),
once that's fixed I will open a merge.
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Title:
Login screen
Ok, after install the PPA, this issue is gone. No reboot since 19th, and
several users used my box, I've suspend and resumed: working like a
charm.
Now how can we get this patch as an official update?
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Now almost 2 days using: I've resumed from suspend, switched users, and
still working fine! Hope we can get this published soon! Thank you
@c4pp4!
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I'm adding the PPA to my install in order to test.
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Title:
Login screen showing Authentication Failure Switch to greeter...
To manage
@Krzysztof Ostaszewski
Test build:
https://launchpad.net/~c4pp4/+archive/ubuntu/ppa
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Title:
Login screen showing Authentication Failure Switch
@c4pp4
How can I apply the patch? Or should I wait for it to be upstream and
available via apt upgrade? I am on Ubuntu 18.04 and 18.10 with same
multi-user problem.
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@Khurshid Alam
I have tested it with multiple users without problem. I have tweaked it
little bit.
** Patch added:
"0001-Fix-authentication-failure-when-switching-user-sessi.patch"
** Patch removed: "authentication.patch"
https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1733557/+attachment/5229051/+files/authentication.patch
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@@c4pp4
Please test if it works with multiple users. If it does it's better to
attach a git patch with proper header.
commit your local changes using
git commit -a -m ""
then generate a patch using
git format-patch -s -n -1 HEAD
Then you will have a 0001-*.patch in root project dir.
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Same issue, sometimes, with Ubuntu 18.10
switching user isn working
workarround is to switch to another console (ctr-alt-F1) after loggin in get my
session back
if it occours, itś every time the screen locks also with the lock-screen button
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The attachment "authentication.patch" seems to be a patch. If it isn't,
please remove the "patch" flag from the attachment, remove the "patch"
tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the
team.
[This is an automated message performed by a Launchpad user owned by
@Rael Gugelmin Cunha
My knowledge is not PAM friendly but I think it's something like this -
when the screen is locked, PAM transaction is started via pam_start and
after authentication (entered a password) it's closed via pam_end. But
if we switch user from the locked screen, PAM transaction is
@c4pp4 is the attached patch file a solution?
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Title:
Login screen showing Authentication Failure Switch to greeter...
To manage notifications
Single user desktop - steps to reproduce:
1) restart computer or log out user
2) log into user session from LightDM
3) use the gear icon menu to lock the screen
4) use the gear icon menu to switch the account
5) now we are switched into LightDM
6) log into user session again
7) use the gear icon
Same issue on Ubuntu 18.04 LTS using Unity / lgihtdm / Compiz.
Every time I lock the screen, I have to "switch to greeter" as it shows.
So...Any solution to fix this now?
I'm not sure if the information below would help.
➜ ~ tail /var/log/auth.log
Dec 25 14:54:05 gadflysu-ubuntu lightdm:
I also experience the same problem on a fresh Ubuntu 16.04.5 LTS
install. Fresh meaning: installed 6 days ago, in the meantime had to do
'sudo apt install --reinstall ubuntu-desktop'. Since then, I'm having
this issue every time I lock my screen.
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I 've got this bug after "apt-get dist-upgrade" on my system too.
System before bug:
Ubuntu 16.04.1 LTS
Kernel 4.4.0-45-generic #66-Ubuntu SMP
After upgrade:
Ubuntu 16.04.5 LTS
Kernel 4.4.0-131-generic #157-Ubuntu SMP
User A logged in
User A lock screen
User B logged in
User B logged out
User
** Also affects: unity
Importance: Undecided
Status: New
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Title:
Login screen showing Authentication Failure Switch to greeter...
To
This bug happens to me also. I had this problem in my laptop during a
few months. But it disappeared after a while. Now it suddenly appeared
on my desktop. 16.04 LTS. I dont have other users in my computers as
others mentioned. It happened after a few weeks of a fresh Ubuntu
installation. Annoying
@angela: I tested and it doesn't work. It had the same effect as restart
or restart unity/compiz plugin: it'll work only until log with second
user and suspend, then error is back.
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I solved it with this:
https://medium.com/@5XvYrLT7/fix-ubuntus-switch-to-greeter-bug-
715d05520f46
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Title:
Login screen showing Authentication
In reply to #105
Have tested reverting that fix and it just re-introduces the bug
"After locking screen there is no input field to type password for unlock"
Having no input field is worse.
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Hi. I also have this problem on my DELL Optiplex AIO 9010 running Ubuntu
16.04.5 LTS.
And "Yes I know that 16.04 is no longer supported" ... however it seems that if
you upgrade to 18.04, it does not solve the problem and in fact makes it worse
!! At the moment, I get this message after my
I think this is the related diff:
https://code.launchpad.net/~azzar1/unity/fix-missing-entry-
lockscreen/+merge/330801/+preview-diff/804854/+files/preview.diff
If someone can test reverting those changes...
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As many others, after a recent update, whenever on return to any of the
three machines I have with up-to-date 16.04.5, I am met with the
"Authentication failure message" and am forced to switch to the greeter
which on some boxes (e.g. my workstation with multiple NVIDIA GPUs)
takes >5 sec.
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Recompile the greeter schemas made nothing here: after the second user
login/logout, the first one will continue to see the message.
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Title:
Recompiling the greeter schemas as mentioned in #89[1] worked for me
(Ubuntu 16.04 x64) -- haven't seen the failure in weeks, was seeing it
every day or so before. I have no idea why it works, but so far so
good. Wish I had time to dig deeper.
$ sudo glib-compile-schemas
God, this bug is so annoying... I faced it several times in a day!
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Title:
Login screen showing Authentication Failure Switch to greeter...
To
Usually after click to switch to greeter and got able to login, if I
restart compiz (compiz --replace &), this will stop.
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Title:
Login screen
I upgraded from 16.04 to 18.04. Same problem with the exception that I
can't switch to the login screen from the lock screen by hitting a key.
I need to press CTRL-ALT-F1 to get to the login screen. Then I can log
in to get back to my session.
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FWIW this has been happening to me for some time.
Single user on this laptop.
Ubuntu 16.04
It doesn't happen all the time, but it occurs sooner if I have been using a
large number of tabs in Chrome.
Hope that might help. :)
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@Rolf: this issue is not new. But it started to happen everytime a
second user logs in after
https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1311316 fix. I
helped to test that fix.
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I can confirm this problem running Ubuntu 16.04 on Lenovo Carbon X1.
Started ~4 months ago. Lock, close lid, open lid, "ubuntu
authentication failure switch to greeter", hit enter and return to
normal login screen. Single user.
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I doubt this is a regression due to the fix for bug 1311316, simply for
the fact that this problem was reported last November while the fix for
bug 1311316 was only uploaded to the archive in February.
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** Tags added: bionic
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Title:
Login screen showing Authentication Failure Switch to greeter...
To manage notifications about this bug go to:
A full reboot did fix this for me on 16.04
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Title:
Login screen showing Authentication Failure Switch to greeter...
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The extra "Enter" to take me to the login screen is killing couple of
seconds of my work. I am not sure if this is related to Xorg. Ping me if
I need to dig in more. Here's the log
[ 40206.697] (II) AIGLX: Suspending AIGLX clients for VT switch
[ 40206.751] (EE) modeset(0): failed to set mode:
^ Crap. I was hoping the upgrade to 18.04 would remove it. I have the
same bug with 16.04. This is been going on for some time. Does anyone
know what is causing it???
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This bug happens in Bionic (18.04) too.
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Title:
Login screen showing Authentication Failure Switch to greeter...
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I updated snapd (along with many other packages) and now the message is
gone. Maybe snapd was at fault, but I am not sure.
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Title:
Login screen
I've experienced the same problem on a fully patched 16.04 LTS.
This issue only occurred in the last few weeks & may have corresponded to when
I added 3 new users to the machine.
I have previously used the first option in
Same error here with me on 16.04 (+ latest updates from security). Also
using virtualbox as a plain ole non-root user.
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Title:
Login screen
Same error : 16.04lts , single user, dual boot.
kernel 4.13.0-39-generic
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Title:
Login screen showing Authentication Failure Switch to
count me an additional sufferer - 16.04.4, upgraded as upgrades came
out. I also see the behavior go away for a time, then come back after
the computer has not rebooted for a period of time. I see it no matter
how the computer is locked: crtl-alt-L, lid close to sleep, timeout, the
. Once the
this is happening to me on 18.04 upgraded all the way from 16.04 as the
releases came out.
i don't have secure boot , i use an nvidia graphics card , i am running
vmware workstation 14
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I can confirm the issue on 16.04.4 LTS. And I am not switching any
sessions.
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Title:
Login screen showing Authentication Failure Switch to
Same issue on Ubuntu 16.04.4 LTS (single user login).
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Title:
Login screen showing Authentication Failure Switch to greeter...
To manage
Same issue ubuntu 17.10 and auth.log looks exactly the same as reported
in https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1733557/comments/35>
comment #35 above.
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tail /var/log/auth.log output
** Attachment added: "greeterror.log"
https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1733557/+attachment/5138306/+files/greeterror.log
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This happens to me on 16.04LTS about once a week. When it happens my
login also changes to Kanji characters. the only way to fix it is to
reboot. Then it comes right back.
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@Rael Gugelmin Cunha (rael-gc):
You are probably right. The changelog for the "unity" package says: "* Refactor
the way UserAuthenticator is created and passed around. Handle failures to
create new threads and fallback to a "Switch to greeter..." button in case of
failure. (LP: #1311316)"
It
This bug has been bugging me for a while now, not sure exactly when it
showed up but it was after an update a good while ago. When I lock my
console, I get this "bug screen" immediately. When I want to unlock I
have to click the "Switch to greeter" button which has mysteriously
replaced my
My issue resolved itself. There was a kernel update with some other
package updates and after restarting the problem was gone.
The shadow file permissions are OK now, I did not have a chance to check
them before.
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I have this problem, and found a thread here:
https://askubuntu.com/questions/584207/cannot-log-in-at-locked-screensaver-must-log-in-with-switch-user?utm_medium=organic_source=google_rich_qa_campaign=google_rich_qa
The fix that worked for me was a permission problem on /etc/shadow
$ ls -l
> This seems to be happening to me when my screens locks from timeout
and I come back.
Me too.
I started getting this problem about a week ago after the usual updates.
Ubuntu 16.04 LTS. I have only one account I use, pretty much defaults
everything. I do use Virtualbox though I get the problem
Same problem here. Sometimes after this occurs, I cannot even log in,
have to restart the system.
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Title:
Login screen showing Authentication
This seems to be happening to me when my screens locks from timeout and
I come back.
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Title:
Login screen showing Authentication Failure Switch
Sorry, top-right corner of the top bar of course.
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Title:
Login screen showing Authentication Failure Switch to greeter...
To manage
Kind of workaround until this annoying bug will be fixed.
This is for thouse who has this problem with multiple accounts.
1. Logout from all accounts or reboot the computer.
2. Login to first account.
3. Click the gear icon near clock in top-left corner of top bar, select second
account in menu
i don't think disabling the "guest session" session is part of the
issue, as we have that disabled and are still experiencing the problem.
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Title:
Got the same issue. Disabling guest account seems not worked
https://askubuntu.com/questions/62564/how-do-i-disable-the-guest-session
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Title:
I got the same problem. But now it is working fine after disabling guest
account as mentioned in the below article
https://askubuntu.com/questions/62564/how-do-i-disable-the-guest-session
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Updated just now and rebooted and it seems to be fixed, just a normal
login prompt. FYI :)
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Title:
Login screen showing Authentication Failure
Wondering if this issue is a side effect of fix for
https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1311316
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Title:
Login screen showing
Mostly same thing here with a brand new install.
It began to happen not long after I added an account for my wife.
The "Authentication failure" (on a separate login screen) systematically
appears when I lock my screen with +L (or selecting Lock/Switch
Account...)
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Same here, Ubuntu 16.04.4. If I close the lid to put my DELL E6230 into
sleep, upon opening the lid and bringing it out of sleep, it says
'Switch to greeter' message, same as OP.
Last system updates I actioned was installing security updates for the
Wayland Compositor (Binary utilities & dev
Same here, either after updating Ubuntu 16.04 or after installing
Virtualbox. Just started this week.
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https://bugs.launchpad.net/bugs/1733557
Title:
Login screen showing
Same on 16.04 after updating Unity to latest proposed packages.
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Title:
Login screen showing Authentication Failure Switch to greeter...
To
I too have same problem. It just started in this week. I am using Ubuntu
16.04 version.
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https://bugs.launchpad.net/bugs/1733557
Title:
Login screen showing Authentication Failure
Same as everyone, #12 for instance. Appears each time I lock.
But it hasn't occurred to anyone that this could be some kind of phishing
technique?
Very often I start typing my password (or half of it) before realizing I have
to click to switch to greeter, and in the meantime this screen is
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