Questions about the login screen, specifically customizing/troubleshooting it.

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157
votes
39answers
449k views

How to fix “The system is running in low-graphics mode” error?

Note: This is an attempt to create a canonical question that covers all instances of "low-graphics mode" error that occurs to a user, including but not limited to installation of wrong ...
111
votes
26answers
158k views

Ubuntu gets stuck in a login loop

My problem: As you can guess my Ubuntu is stuck in a login loop when trying to enter my desktop. When I login, the screen gets black and soon after that the login screen comes back. I'm a Ubuntu ...
61
votes
16answers
37k views

How do I disable the drum beat sound on the login screen?

I would have expected System ▸ Administration ▸ Login Screen ▸ Play login sound to control this, but unchecking it does not prevent the drum beat sound from playing.
58
votes
2answers
76k views

What's the difference between GDM and LightDM?

What is the difference between GDM and LightDM? How can one switch between them. I mean if I have selected LightDM during installation process, will I be able switch to GDM?
48
votes
8answers
63k views

How to enable numlock at boot time for login screen?

I am trying to force numlock to be on upon initial boot at the login screen on Ubuntu 12.04. The only solutions I have found so far switch numlock on only after initial login. I'm looking to force ...
25
votes
2answers
27k views

How can I make LightDM the default display manager?

I have LightDM installed and can start it with sudo start lightdm. But at boot, GDM is still the default. How can change this so LightDM is loaded automatically at boot instead of GDM?
24
votes
8answers
17k views

How can I change the login screen theme in GDM?

How can I change the Login screen theme? Is there a graphical way or no?
21
votes
6answers
35k views

Cannot login to my user account

I upgraded my ubuntu from 11.04 to 11.10 via mounting the latest alternate CD image released on Oct. 13 as the final standard version and running the cdromupgrade prompt successfully, with full latest ...
21
votes
2answers
478 views

Before you login you must answer me these questions 3?

I have two kids that love Ubuntu so much so that they are not doing their Math homework. So in the spirit of Monty Python, I would like to present them with something like: "Stop. Who would cross ...
21
votes
5answers
5k views

How can I take a screenshot of the login screen?

How can I take a screenshot of the login screen? I do not want to recreate my Ubuntu installation in a virtual machine.
18
votes
2answers
24k views

Will Ubuntu 11.04 use GNOME 3?

Will Ubuntu 11.04 use Gnome 3? If so, what differences for end-user is going to be? I know that there won't be Gnome shell, but what about the login screen? Will Ubuntu continue using that old (GNOME ...
14
votes
7answers
13k views

Hibernate missing in login screen

Re-enabling hibernation by adding a rule to policy kit added the option to hibernate to the desktop session as expected, but not for the login screen. How can I enable hibernation right from the ...
13
votes
6answers
9k views

Force gdm login screen to the primary monitor

I have two monitors attached to my video card. Primary monitor has a resolution equal to 1280x1024 and the second has 1920x1200. My gdm login screen always appears on the second monitor even if it is ...
13
votes
0answers
6k views

How do I disable the startup sound in Ubuntu 12.04 login-screen? [duplicate]

Possible Duplicate: How to disable login sound? I would like to know how to disable the startup sound in Ubuntu 12.04 login-screen; that is, the sound produced at the login-screen before ...
12
votes
4answers
2k views

How do I go back to KDE splash / login after installing XFCE?

I started with Ubuntu Karmic, and wanted to try KDE. So I installed kubuntu-desktop. Then I wanted to see how XFCE progressed, so I installed xfce4. I now have Kubuntu with an XFCE splash and login. ...
12
votes
8answers
35k views

Changing login screen wallpaper

I have been trying to change my login screen wallpaper to one of my own using ubuntu-tweak. The wallpapers are located in Ubuntu's default wallpaper folder and I have given all users read privileges ...
12
votes
1answer
257 views

Can I set a default “About Me” photo?

Is there a way to set a default "About Me" photo so that all users created in the future start off with the same user image on the login screen?
11
votes
5answers
6k views

rotated monitor. login screen needs rotation

I rotated my screen, an once I login, it works fine. but, the greeter (login) screen hasn't got the message that things are rotated 90 degrees. How can i change the rotation of the login screen? ...
11
votes
8answers
41k views

after 12.04 upgrade: can't log in although password is correct

I upgraded from 10.10 to 12.04, and now can't log in any more. The password is correct- when I type in a wrong one, I am told it's incorrect, while the correct one is seemingly accepted, but then just ...
11
votes
2answers
23k views

Remote login with graphical display manager (GDM, LightDM)

Is it possible to remotely (via ssh) make a login to GDM? I'll explain a situation in which I'd need this: I'm on my laptop and connect to my desktop via ssh. I realize there are some updates ...
11
votes
1answer
1k views

How can I enable a face browser in LightDM?

Is there a way to enable face display in the default LightDM greeter in Oneiric? If not, is there another alternative greeter that supports faces? (I know I can switch back to gdm if necessary, but ...
10
votes
1answer
6k views

Personalize monitor position before login

I'm using multiple monitors. When logged in everything I fine. Left monitor is positioned left and right monitor is positioned right, but before I login the login screen positions them the other way ...
10
votes
1answer
2k views

How to disable num lock warning

In the log in (and lock) screen of Ubuntu 11.10 I get annoying warnings that my Num Lock is on. As it is (on my Desktop) totally irrelevant or Num Lock is enabled or not, is there a way to disable ...
10
votes
6answers
2k views

“Shut down” takes me to greeter now?

UPDATE - Removing my USB wifi dongle seems to cure the problem. So does disabling networking (but not disabling wifi alone). Now what? UPDATE 2 - The 'uptime' command says there are 2 users logged in. ...
9
votes
4answers
17k views

Ubuntu 13.10 - Black screen after logging in after installing nVidia drivers

I recently installed Ubuntu 13.10 in a dual-boot with Windows 7, so I'm still quite new to using Linux. Most things were working fine, and I could log in normally (apart from the first login after ...
9
votes
4answers
482 views

How can I disable passwordless login?

I set my account to be allowed to log in without a password. I only wanted this temporarily, but I can't seem to change it back to how it was before. How can I make it so that my password is ...
9
votes
3answers
749 views

How can I display a message on the login screen?

In some circumstances it would be valuable for me to be presented with a short, text notification prior to logging in, so that I have the option to decide not to log in after seeing the message. Is ...
8
votes
9answers
19k views

Desktop login fails, terminal works

I have a freshly setup 12.04 LTS pc system (120 GB SSD, 1 TB HDD, 16 GiB RAM); since a few days, I can't login to the graphical desktop anymore: there is very short flashing shell window which ...
8
votes
5answers
10k views

Is there a way to change user picture in Xubuntu, and actually display it on login?

I am aware that the way to change user picture, is creating a .face file on /home... The thing is, this only works when one checks the users and groups on System directory... When it's time to login, ...
8
votes
10answers
41k views

Login screen loops unless you login as Guest [duplicate]

I am running a VMWare Player with a Ubuntu 12.04 LTS Precise Pangloin as Guest on my Windows 7. Sometimes I get the shutdown blue screen error in Windows, this time it happened when I was running the ...
8
votes
1answer
2k views

How can I set the clock to 24 hour mode? [closed]

How can I set the clock to global (24h time) in Maverick instead of am/pm? Including the login screen? I mean there's no option to do that in rclick clock > preferences or in system > admin > time ...
8
votes
5answers
16k views

How to restore Ubuntu login screen after lubuntu install?

I have Ubuntu 13.10 installed. I then installed lubuntu 13.10 (sudo apt-get install lubuntu-desktop) too. As a result the login screen has changed and I can no longer get an on screen keyboard. How ...
8
votes
2answers
116 views

How do I add or manipulate Application/System Indicators in the login screen?

I would like to remove several of the Indicators that usually appear in the upper-right-hand side of the login screen. In particular, I would like to remove the accessibility, keyboard layout, power, ...
8
votes
6answers
11k views

How do I prevent being kicked back to the login screen every time?

Just finished upgrading from Ubuntu 13.04 to 13.10. Everything works fine. After the installations, I restart to finish the installations. In the log in screen, I put my password and then it goes back ...
8
votes
1answer
975 views

Multimonitor in login screen vs. lock screen

I have a multiple monitor setup with two screens. The login screen uses dual monitor mode (as seen on the first picture), but the lock screen (CTRL + ALT + L) uses only a single monitor and disables ...
7
votes
2answers
10k views

How to return the login screen to the default

I've been experimenting with various Desktop Environments, including LXDE, XFCE, KDE. I'm returning to Unity, and I would like my login screen back to the default for 12.04. I think that it changed ...
7
votes
3answers
22k views

“Failed to start session” after interrupted upgrade to 14.04

While upgrading to 14.04 using sudo do-release-upgrade my network connection was interrupted and several packages failed to upgrade. Running do-release-upgrade again reported No new releases found ...
7
votes
2answers
847 views

Can I move the password field to the center of the login screen?

I am using Ubuntu 11.10 ( I reverted back from 12.04 to 11.10 because of stability issues). I would like to know is it possible to change the location of the password field in the login screen ?
7
votes
3answers
4k views

How can I require users to also enter their usernames upon login?

Good day, Does anyone know how to modify the login screen so that users are required to type their username along with their password? I'm running Ubuntu 12.04 with all default settings
7
votes
2answers
12k views

How can I change the keyboard layout in the login screen? [duplicate]

I have different users on the machine who use different keyboard layouts. In 11.04, you could change the keyboard layout on the login screen (and it would remember it per user). How can I do this in ...
7
votes
1answer
10k views

Disable auto-login from the CLI

After successfully installing Ubuntu and logging in to the Unity desktop, I followed the prompts to enable the proprietary display drivers. After rebooting, the Unity desktop is now entirely ...
7
votes
2answers
6k views

Is it possible to use the 'unity-greeter' for LightDM on Xubuntu 11.10?

I was wondering if there is a way to use the 'unity-greeter' instead of 'lightdm-gtk-greeter' for LightDM on Xubuntu Oneiric. I tried installing the unity-greeter package and changing the ...
7
votes
1answer
947 views

Run conky over LightDM

Is it possible to have my conky gadgets run over my lightDM login screen? If so, how would I go about this? I saw someone doing it with XDM under debian in this screenshot from a thread on the ...
7
votes
1answer
223 views

Entirely disable suspension (at kernel level? - has to be independent of used DE and login state!)

Once again I need a workaround to deal with my almost broken notebook graphics card: It does not wake up after suspending! The Ubuntu 14.10 system is waking up, but the display stays off, so I have ...
7
votes
3answers
6k views

LightDM is running but does not display on login

LightDM is installed and running by default as a part of the Beta release. Yet, LightDM is not displayed at login time, rather a primitive, GDM like manager is the one we find at login time. I tried ...
6
votes
3answers
323 views

How can I make the login screen appear instead of logging me in automatically?

My ubuntu logs me directly into my desktop, but is not showing the login screen. I have 14.04 LTS so I want to select KDE, but my system boots to the desktop directly. Any way to go to the login ...
6
votes
3answers
10k views

Light Display Manager as login account [closed]

yesterday I installed Ubuntu 13.10, and since I rebooted my laptop, there is a user account called Light Display Manager as available option on my login screen. A password is needed for login, but I ...
6
votes
2answers
679 views

Is there a way to replace kdm with gdm?

Well i tried kubuntu not long ago , didnt liked it and purged it from my system, except one thing, I still have the kde login screen, is there anyway to get my gnome login screen back?
6
votes
2answers
949 views

Is there a way to take a screenshot of your log-in screen on startup?

I have a bug on my auto-log-in which is only shown When I log in the first time. There for I need a way to take a screenshot of my log-in screen when I start up. I know about this question, but the ...
6
votes
2answers
7k views

Caught in loop when trying to login after upgrade from 14.10 to 15.04

After an otherwise uneventful upgrade from 14.10 to 15.04 I cannot login. When I provide my password the screen flickers briefly and I am back at the login screen. I have checked permissions on ...