Is there any way to change the appearance of the Lock Screen on Ubuntu 13.10 (unity)? At current its simply a black screen with a tiny clock on the upper right corner. I would like to change this to another image or maybe even change the position and size of the clock if possible. Note: I would like to change the look of the screen when its in the &quot;locked&quot; state as I already have my login screen set how I want, but now I want to adjust the look and feel of the screens while they are locked (pre-password prompt). Im looking for a &quot;locked&quot; screen more akin to what is seen in Gnome3 and Mint with a large clock and other things displayed. Also, that answer only applies to GDM, not LightDM, which handles the lock screen now.
124101
Is there any way to make the login screen from a locked session (either by using Ctrl+Alt+L or from a screen timeout) look like the login screen when you're starting a new session? I hate that everything on the lock screen aside from the password input is black.
21063
I was installing ubuntu-Gnome 16.04 on my Asus ROG GL522VW laptop with an nvidia GTX 960m graphics card, and stumbled upon a problem.  After installation, I don't even get to the login screen. Instead my screen just freezes. I had this problem before, and got my answer in this post:   So I booted with nouveau.modeset=0, and everything boots just fine. But after I use additional drivers to install the NVIDIA binary driver - version 361.42 from nvidia-361 (proprietary, tested), I only get a black screen when I try to boot regardless of whether nouveau.modeset=0 is set or not.  While the screen is black, when I try to access the command line with ctrl + alt + f1 all I get is this: A start job is running for Hold until boot process finishes up (Xmin Xs/no limit) and no matter how much I will wait, it doesn't end and I have to reboot.  I followed the instructions in this post:   When I boot after reinstalling everything and choosing lightdm - it basically works but my login screen looks like a unity login screen, and when I insert my credentials it shows me a very bugged screen with all kinds of broken images with some of the things I had on my last boot, and after a few seconds my screen flashes on and off and it boots into my normal desktop, but still keeps spitting out system problem detected with only the option to close or report.  Also tried to install nvidia-355 and all kinds of versions, with no luck.  I wouldn't mind working with nouveau.modeset=0, but as far as I understand this disables my graphics card and doesn't utilize all of it's potential?  Any help or insight will be greatly appreciated. Sorry for the long post and if I should include more information please tell me what else I should include.  A huge thanks up front!  Edit: Reposted this question again and didn't know I can just edit the question to get it back up.  Edit2: Bumping again in a last effort to solve this issue  Please let me know if it is lacking information.
26447
I am setting up Ubuntu 12.04 with Gnome3 for a computer lab.  I don't want the users to be able to change the background of the computer.  Is there a way to prevent this? Or to revert the background back when the computer reboots?
19535
I need to remove the annoying new "locking" screen that shows a giant clock: I can't remove it with just moving the mouse (as with any other desktop environment), the animation is slow, and it isn't asking me for a password!  I managed to disable it, just to discover that now I can't lock my screen on purpose, so I can't go away from the computer.  Just to clarify, I want to:   After some time the screen could go black, but if I move the mouse or press any key then I can use it directly (like a normal screensaver). If I press super-L then it is locked, and I must type the password to unlock (like a normal lock screen).   I found several "solutions", but none seems to work:
69051
KDE and XFCE4 has a program to adjust the screen brightness automatically in battery mode to a preset value. How can i set the same with Unity ( or Gnome3 )?
96498
I am building a Custom ISO of Ubuntu 18.04 LTS using CUBIC and I'd like to change the default background and lock screen image.  I added the backgrounds in /usr/share/backgrounds, changed the background in /usr/share/gnome-background-properties/ubuntu-wallpapers.xml file, but it does not seems to affect new users (for example the OEM user).  Also, I did not find any way to change the lock screen image.
28533
A few days ago I turn on my computer and when Linux started, the icons on the desktop look black, I tried reinstalling the desktop, the gnome-shell, updating but nothing happens. I attached a picture with the problem.
118219
When I lock my computer, the first monitor shows "Press CTRL + ALT + DELETE to unlock", and the secondary monitor is just black. But in some office I saw the second monitor showing the desktop background.  How can I accomplish this?
87494
How can I change the Ubuntu 20.04 login screen theme or background?  In the previous version 19.10, I can change it from the CSS file under Yaru theme but now there is no CSS file.
102893
After the screen saver activates, or after I manually lock the screen via Ctrl+Alt+L, I see a blank black screen with just the date / time in the upper right corner. A few seconds after that, my HP flat screen monitor(s) lose the video signal and display ugly hopping "No Input Signal" boxes.  I'd like to keep the blank black screen (It's less distracting, consumes about as much power, and allows me to unlock faster, as the monitors don't have to re-sync), so Ubuntu should keep driving the video output while the screen is locked.  How can I configure this? I'm using Ubuntu 14.04.3 LTS with the Gnome Classic Fall-back. Graphics card is NVIDIA with the open source Nouveau driver, but I also see this with an external HP NL571AA USB graphics adapter.
90351
I installed Ubuntu Studio 15.10 and upon that:  sudo apt-get install ubuntu-desktop   Now on the login screen, I have the default brownish Ubuntu default background.   I tried this as root:  sudo xhost +SI:localuser:lightdm sudo su lightdm -s /bin/bash gsettings set com.canonical.unity-greeter background /usr/share/backgrounds/Tranquil_by_Pat_David.jpg   But this didn't change anything. Also starting the unity-control-center as user lightdm and changing the background there had no effect. I also checked the rights of /usr/share/backgrounds/Tranquil_by_Pat_David.jpg which are globally readable.
89080
I've installed Ubuntu 18.04, and everything worked excellent until I decided to try Unity desktop. Bottom line - I've uninstalled unity desktop completely. But! I have some stuff that didn't recover to previous state. First is the login screen that have changed, and I want to bring back the gnome native login screen.  Second is the Lock screen (that is shown on wake up). Before unity it was the gnome's one, that you can change it's background in the background properties.  After unity it changed to annoying login form that doesn't work if the keyboard layout is not english, and you just can't switch between layouts in this form and all the window around it. So if before sleep I was using hebrew or russian layout, on wake up I just cant log back in, and I have to restart the pc.  How can I switch back to normal gnome stuff? Thanks!
69473
I would like to modify unity to not show the launcher (left side bar) at all. I'm not looking for any solution that would let the launcher be in some cases visible. I really want it to completly disappear. It's a gift for my fiance and I want to achieve the highest possible Woman Acceptance Factor for her linux laptop which is running a docky dock with fancy icons that make it look like being from that known and fruity company.  Any hints about which packages and which source files I should study?   I'm hoping it to be as easy as commenting out the line with "unity.launcher.show()" and recompiling :-)  Thank you!
6538
I've just installed Ubuntu 18.04 and I want to disable the lock screen.   I don't want to see it at all, neither on power-on nor after suspension.    I tried:      Settings -> Privacy -> Screen Lock -> and changed 'Automatic Screen Lock' to 'Off'.   The lock screen still appears after suspension. Any suggestions?
38096
There is no "Lock" option showing up in the user menu, and the standard shortcuts (Ctrl+L or Ctrl+Alt+L) don't do anything.  I'm running Fedora 19 with Gnome Shell 3.8.3, and XDM 1.1.11.  I'm using XDM because of broken XDMCP support in GDM - but before I upgraded to Fedora 19, I did have the lock option, even when using XDM.     I've posted an answer reflecting the results of my own research. It basically says that it's not possible to have screen-lock integrated into Gnome 3.8 without running GDM.      I really hope there's a better answer available though - so please add your own answer if there's any way to do this that I overlooked.
23183
I am running Ubuntu Gnome 16.10 (64bit). Gnome-shell version 3.20.4.   When I start my computer, I eventually see GDM3 offering a login prompt, as expected.   After I login, my monitors flash a little (like they're unplugged and then replugged in), and then I am brought to the gnome 3 desktop.   However, if I hit  CTRL + ALT + F1, I am brought back to GDM3, offering a login prompt.   If I then hit CTRL + ALT + F2,  I am brought back to my Gnome 3 desktop.  So it seems like GDM3 continues to run in TTY1 while the desktop runs in TTY2.   Questions   Is this how things are supposed to work? I thought the desktop was supposed to use the same TTY (or whatever you call it) as the display manager.  Am I using more graphical resources by having things setup this way? Is there a way to have GDM3 pass off the display to Gnome Desktop after I login? Is there any advantage do doing #3?
41519
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 format. This cannot stand. Yet after diligent searching, I am unable to find a solution.   Is this configurable in KDE?