The lock screen lets a user lock the currently-running session behind a password screen. This screen may either be blank or show a screensaver until mouse or keyboard activity is detected.

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5
votes
1answer
24 views

Keep computer locked in a view-only state

Is there any way to keep my computer locked in a "view-only" state? I want to be able to see the screen, but if I want to control the computer, I'll have to enter my password. I cannot move the ...
1
vote
0answers
8 views

Ubuntu 16.04: changing language on lock screen results in crash

When I change the language on lock screen with keyboard shortcut, the system freezes for a few seconds, the lock screen disappears (I haven't typed a password), for fraction of a second I see all my ...
3
votes
2answers
2k views

Computer not asking for password after waking from sleep

I have recently installed Ubuntu 14.04 and set up an account with a password. I configured the computer to ask for a password after waking up from a sleep however, I am still brought back to desktop ...
2
votes
2answers
90 views

Enable password on lock screen

I have a problem with restoring the password request on the lock screen. During the installation of Ubuntu I specified the auto-login option, but now I want to re-enable the password protection. ...
1
vote
2answers
162 views

When I watch a video online the screen turns off after a few minutes

in some sites when I watch a movie in a browser and I don't touch the computer the screen turns off. In other sites like Youtube I don't have that problem. I tried using caffeine but I don't like the ...
1
vote
3answers
1k views

Xubuntu doesn't lock screen anymore

It was working and one day it decided not to work anymore. I can click on the lock screen button or use Ctrl+Alt+Del but no reaction. How to fix that? I am using Xubuntu 14.04
2
votes
2answers
4k views

How to disable xscreensaver lock on suspend?

I have recently installed Ubuntu 12.04 LTS and have installed xscreensaver. As I am the only user on this computer and I am only using the computer for music, movies, and some web browsing I have no ...
2
votes
1answer
320 views

Ubuntu 16.04 Brightness & Lock - Screen does not turn off

I have 16.04 LTS on a Dell XPS13 (L321X) and an external LG display connected. I set it up to: -dim the screen -turn screen off when inactive for 10 minutes -lock ON -lock screen as soon as screen ...
0
votes
0answers
10 views

Xubuntu Keyboard partially responding after lid down only in some applications

Question: why this happens, how to track it down, how to fix? Lid down > Lid up > Keyboard works. Lid down > Lid up > Keyboard in Firefox or Terminal doesn't work, Alt+Tab doesn't work > move (mouse)...
2
votes
1answer
65 views

Controlling Ubuntu Gnome 16.04 screen lock with arduino

I am trying to use arduino with my laptop (Ubuntu-gnome 16.04 installed) to control the screen lock using RFID Module (Screen lock/unlock is controlled by an RFID card) Here in this particular case, ...
6
votes
2answers
126 views

Locked computer gets very hot despite no CPU-intensive tasks running

I'm using Ubuntu 15.10 on my HP ProBook 6470b laptop. When I lock it and walk away from my desk it often gets very hot, very quickly. Here's a screenshot of Psensor graph which shows the problem, the ...
0
votes
0answers
17 views

Blank screen when switching users

I just created a new user account on my home computer (14.04 LTS) and switched to that account (after a slight detour because the user dir already existed), then left the computer for a while and ...
1
vote
0answers
54 views

Kubuntu 16.04 lock screen issue

I have installed Kbuntu 16.04 LTS On Intel® Desktop Board DH55TC With Intel® Core™ i3 CPU 540 @ 3.07GHz 500 GB SATA hard drive Connected to 42" LG TV with HDMI cable TP-Link 300 MB USB wireless LAN ...
1
vote
0answers
37 views

How do I configure the lockscreen to use my PAM module in 16.04

In 14.04 I was able to do this by adding a line to /etc/pam.d/lightdm and my module is invoked for both login and the lock screen. In 16.04 it is only invoked at the login screen; the lock screen ...
0
votes
3answers
6k views

How to get Pantheon Greeter on Ubuntu 14.04 instead of Unity Greeter

I'm running Ubuntu 14.04, how can I replace the lockscreen with the one on Elementary Luna (Pantheon-Greeter). Thank You!! Edit: Can anyone do it and confirm it works completely?
3
votes
0answers
38 views

Unlocking at the lock screen fails

I have encountered a strange issue with my Ubuntu 15.10 install: Usually, I lock my desktop with Ctrl+Alt+L when I leave my computer, and when I come back, I enter my password and can continue working....
50
votes
1answer
1k views

How do I stop the constant requests for a password?

I am 70 years old and losing my memory. The only other person here is my wife, who I trust with everything. I have Ubuntu set to automatically log me in when I boot the system. I need to stop the ...
1
vote
1answer
125 views

unable to set lock screen in ubuntu 16.04?

I am using dconf-editor to change my lock screen , but it always falls back to default one. I'd tried every method that's possible using dconf-editor, but unable to do so . what's the possible way to ...
6
votes
5answers
3k views

After locking the screen in Ubuntu 14.04, password is not accepted, How can it be fixed?

I'm running Ubuntu 14.04 fully updated on my laptop. Since the last update every time I lock the screen (when leaving my room for example) - when I get back and input my password, it is not accepted ...
1
vote
1answer
198 views

Ubuntu 16.04 lock screen without dimming/turning off

I'm using an HP laptop with an external screen connected through an HDMI cable, and the lid closed. Every time I lock the screen, it dims and then cuts signal to the screen, leaving it in a blue ...
0
votes
1answer
56 views

How to prevent Xubuntu from suspend?

Apparently, Xubuntu is totally unable to wake up. So when it goes to sleep, for whatever reason, you lose all usaved work. No Ctrl+Alt+F1, nothing. It is there, the machine is on, but the only thing ...
4
votes
3answers
867 views

Is there any way to make Ubuntu not to suspend while a download in progress?

Is there any way? How to script in /usr/lib/pm-utils/sleep.d to check ${downspeed eth0}, ${upspeed wlan0}, ${upspeed eth0} and ${downspeed wlan0} and to set the system not to suspend while a ...
2
votes
1answer
72 views

Smart lock like on Android?

Is it possible to configure either LightDM or GDM to automatically log in when my laptop is connected to a certain WiFi? Or even better, to check my location regardless of what WiFi I use?
0
votes
0answers
30 views

xfce lock screen opens with any password

I have Xubuntu with xfce4 installed. I have recently noticed that no matter what password i enter, i can go pass the login and lockscreen as if i entered the right password. Note that the keyring and ...
1
vote
0answers
24 views

Disable numlock warning on lock screen for notebook

I own a notebook with separate number pad on the keyboard and running 16.04. On the login screen/lock screen, I see a grey warning triangle in the password input field telling me that NUM-Lock is on. ...
0
votes
0answers
13 views

How to stop screen from sleeping after I lock my session? [duplicate]

First time posting here, so here goes ... I have Ubuntu 14.04 LTS and the issue I am having is that I want to prevent my screens from fading to black and powering down when I lock my session. ...
0
votes
0answers
110 views

Ubuntu 14.04 prevent screen turning off in lock screen

Every time when I am in lock screen, the screen will automatically turn off. I have tried to change the setting in Brightness and lock turn screen off when inactive to never. It will not turn off my ...
1
vote
1answer
286 views

Ubuntu 16.04 LTS black screen after suspension on Dell [duplicate]

I have a Dell Inspiron 15R with Intel® Ivybridge Mobile Graphics. I upgraded to Ubuntu vanilla and the latest version (16.04) few days back. Each time I close the laptop lid with the power source ...
1
vote
1answer
43 views

Ubuntu Touch - Screen lock activating while transferring files

Yesterday I added a few songs/albums from my laptop to my Ubuntu tablet. The process was very easy and it was a pleasure to be able to do something so easy. However, after I had connected the tablet ...
2
votes
1answer
63 views

How to display KDE lock screen time in 24-hour format

Running Kubuntu with the Plasma desktop, 16.04. I have my desktop configured to 24-hour time, which is what I vastly prefer. But when the lock screen comes on, it shows me the detested AM/PM ...
1
vote
0answers
25 views

How to switch to external display when screen is locked

When the laptop is sleeping and connected to the docking station (lid closed), I click the dock's external power button. From the physical indication lights I see that the laptop awakens but see ...
1
vote
1answer
41 views

Ubuntu Touch - Screen locking fade issue

On my Ubuntu phone, I have set my screen lock to come on after a minute of none use. This is in the Settings > Security & Privacy > Locking & Unlocking. The lock does come on as requested ...
5
votes
1answer
703 views

Enable [Fn]+[cursor arrows] on lock/login screen to change volume and brightness

Having a new Acer Aspire E17 E5-773G with Ubuntu 16.04 on it, I experience that the keyboard combinations to adjust volume (Fn + ↑/↓) and brightness (Fn + ←/→) do not work on the login screen or lock ...
0
votes
0answers
25 views

How can I temporarily disable my screen lock settings during video playback?

I use my laptop to watch movies (crazy, I know), sometimes in a browser (Firefox) and sometimes in Totem. Either way, while I'm watching, the screen dims and eventually locks, per my Brightness and ...
2
votes
1answer
64 views

i3wm screen locking security issue

I am using i3-wm on Ubuntu 16.04. I am locking the screen using dm-tool lock, and it looks good, but I noticed you can circumvent the lock screen by switching a TTY (Ctrl+Alt+F1) and then switching ...
5
votes
4answers
16k views

How do I disable automatic screen locking in Xubuntu?

After about 10 minutes, Xubuntu 14.04 goes to sleep all by itself. I've set up the shuffle on the music player and it only gets through 3 songs before I have to sign in again. There is no screensaver ...
8
votes
2answers
102 views

Is the lock screen secure?

I have a fully encrypted drive so I know when my laptop is turned off that nobody can access my data but what about when the screen is locked with my root password? It is often impractical to turn ...
4
votes
3answers
545 views

Is the lock screen secure enough to prevent “Mallory” from accessing the encrypted drive?

I use truecrypt to encrypt one of my drives and I would want to leave the computer running processes that use information of that drive while I'm not home, I've tried suspending it but everything ...
5
votes
1answer
212 views

How to add shutdown option to the Ubuntu lock screen?

Some times I want to just shut the computer down rather than to enter the password and continue. Even if that would be someone else willing to shut my computer down while I'm away he should better be ...
0
votes
1answer
123 views

ubuntu 16.04 dconf locks don't seem to work

I looked at dconf and locks and I came up with this script to try to enforce screen locking. It doesn't work. I used to have this working under debian but can't seem to get it to work under ubuntu. ...
1
vote
2answers
468 views

Why do some shortcuts no longer work when using an alternate keyboard layout?

I have recently switched to the Colemak keyboard layout and the Ctrl+Alt+L key combination no longer locks the screen. I have checked the keyboard shortcuts menu and it is still set correctly. I ...
1
vote
0answers
25 views

stop using internet when screen blanks

Related: When my screen is locked, will running processes/internet connection be halted? This is related, but exactly the opposite is desired. I recently installed the (really terrific) Radio Tray, ...
0
votes
0answers
20 views

Ubuntu Touch - Tablet screen lock issue

Recently (within the last few day) I have noticed that the lock screen on my Ubuntu tablet is not activating. I have it set to one minute and then lock. Before it was locking all OK and even fading ...
0
votes
4answers
398 views

Lockscreen access denied (AD auth via sssd)

On xenial, the lock screen doesn't work for me. Whether I enter the correct password or not, it won't let me in. However, if I click on the menu at the top right corner of the screen and choose "...
0
votes
0answers
68 views

How can I get rid of the second lock-screen in Ubuntu 16.04?

Since my upgrade to 16.04 I am presented with a second lock-screen which I would like to get rid of. The steps to reproduce are as follows: Close the lid of my laptop Laptop turns into standby Open ...
0
votes
0answers
62 views

Screen re activated imidiatlly after idle

After upgrading to Ubuntu Gnome 16.04 LTS, the screen power saver started to malfunction. When the desktop is idle, it turn off the screen as usual, but a second later it turns the screen back on. ...
0
votes
0answers
107 views

change the Ubuntu MATE lock screen theme

I would like to change the theme of my Ubuntu MATE lock screen (by lock screen I mean when you lock the account and then move the mouse to shut off the screen saver there is a window that comes up to ...
0
votes
0answers
35 views

Lockscreen Gone

Currently I am running Ubuntu 15.10 Wily with the Gnome 3 desktop environment. Every time that I set a background for my lock screen it disappears on reboot. I am using the same folder for my ...
0
votes
0answers
28 views

How to set which programs can override screen off/lock?

First, I do not want to disable completly screensaver/lock like asked here How do I disable the screensaver/lock?. I want to disable it just when certain program is running and is not minimized (the ...
0
votes
0answers
46 views

How to trigger lock-screen on visiting a website?

The website in question is my Google Drive. I have many confidential data in my Google Drive. And my google account is signed in on my laptop. Also I tend to leave it unattended at times. I want to ...