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

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120
votes
37answers
331k 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 ...
55
votes
15answers
77k 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. Means the screen gets black and soon after that the login screen comes back. I'm a Ubuntu Newbie so if ...
35
votes
7answers
40k 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 ...
20
votes
6answers
28k 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 ...
7
votes
2answers
17k 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 ...
17
votes
2answers
17k 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?
21
votes
8answers
10k 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?
4
votes
10answers
25k views

Login screen loops unless you login as Guest

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 ...
3
votes
2answers
9k views

Login screen won't accept my password

I recently upgraded to 12.04 from 11.10 and since upgrading have been unable to login to my user profile. The upgrade went okay and I can login to a guest session fine but whenever I try to login to ...
3
votes
2answers
2k views

How do I set the login manager to enable `change languages` at login?

How can I recompile the source to force the option to allow changing languages and keyboard layouts at login?
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 ...
17
votes
3answers
4k 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 ...
9
votes
8answers
33k 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 ...
8
votes
5answers
18k 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 ...
2
votes
1answer
1k views

User Accounts not listed in System Settings User Accounts

I'm running 12.04 on PPC (IMAC G5) - but have a problem with creating/editing user accounts with the System Preferences User Accounts tool. All updates have been downloaded and installed. When I ...
50
votes
2answers
56k 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?
4
votes
6answers
15k views

Cannot login via Unity login screen after upgrade to 12.04

Logging in via the shell accessed through Ctrl+Alt-F1 and logging in as guest via the graphical user interface work 0O When I try to log into my standard user account via the graphical interface, the ...
7
votes
8answers
13k 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 ...
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
1answer
2k 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 ...
6
votes
6answers
8k 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 ...
6
votes
3answers
9k 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
1answer
1k views

Resolution of the login screen is wrong on a second monitor

Is it possible to do changes to the login screen in Ubuntu 11.10? I'm running with a laptop and an external screen and in boot and login they're mirrored and has a weird resolution. To clarify: I'm ...
2
votes
2answers
537 views

How to return the login screen of the original unity ubuntu?

I've installed the LightDM GTK+ Greeter 1.7.0 as below sudo add-apt-repository ppa:lightdm-gtk-greeter-team/stable sudo apt-get update sudo apt-get install lightdm-gtk-greeter ...
8
votes
5answers
8k 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, ...
7
votes
4answers
15k 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 ...
6
votes
3answers
3k 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
6
votes
2answers
7k 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 ...
4
votes
4answers
2k views

capture login screen-not sucssecful

I'm using Ubuntu 12.04 . If more information is needed, please tell me. I Tried some guides to cature my login screen: How can I take a screenshot of the login screen? ...
6
votes
1answer
380 views

How can I change another user's “About Me” photo?

Is there a way for a user with administrative privileges to change another user's "About Me" photo?
6
votes
3answers
18k views

How to change the screen resolution for the GDM login screen?

I use a login list with faces and the icons and text are tiny in GDM. Is there an easy way to change the resolution of the login screen? I'm currently using 10.04 Lucid.
5
votes
3answers
7k 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 ...
4
votes
2answers
4k views

Need restart lightdm at every startup - console login screen

Everytime I boot up my ubuntu 12.10, I get a black console screen. I need to login in tty, and restart lightdm : sudo service lightdm restart Then the GUI lightdm login screen appears as expected. ...
2
votes
2answers
3k views

Add terminal session with network to login in screen

I want to add a terminal Xsession to the log in drop down screen. Can anyone let me know how to do this? No desktop, load only terminal with network support. Booting in recovering from grub lets me ...
2
votes
0answers
900 views

Must login twice before entering Unity; first login screen has graphical anomalies [closed]

When booting my computer I am first presented with the regular lightdm login screen except there are some graphical anomalies in the top 5th of the screen. When I press a key on the keyboard the ...
0
votes
2answers
2k views

How To Change Login Screen Background On 11.10 [duplicate]

Possible Duplicate: How do I change the wallpaper in LightDM? How do i change the background of the login screen on 11.10 i have tried Simple-lightDM-Manager and now all i get is a black ...
5
votes
1answer
8k 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 ...
4
votes
3answers
3k views

Where is the login screen wallpaper located?

I want to know this because I like the picture used and I'd like to use it elsewhere. Where is the LightDM login screen wallpaper located in Ubuntu 11.10?
2
votes
1answer
635 views

Default login screen missing, how to revert?

I installed some KDE stuff by mistake. After removing it, my login screen now is quite different; has a white background and the user icons+input appear in the centre. [note that I have tried sudo ...
2
votes
0answers
6k views

How do I set automatic login in Ubuntu 12.10? [duplicate]

When I boot my computer, I already have to enter my password to decrypt my drive. So an additional password at the login screen (Light DM) would not be necessary. How do I enable automatic logging in ...
2
votes
0answers
1k views

How to disable sliding login screen in Gnome?

I am using Gnome 3.6 and I am quite annoyed by the login screen when my computer wakes up. The new implementation in Gnome includes two steps. First you have to hit Esc or click and drag upward ...
2
votes
1answer
254 views

How to input commands on the Live CD mode selection screen

http://www.ubuntugeek.com/how-to-fix-ubuntu-10-04-lts-lucid-blank-screen-at-startup.html I have the problem in the above answer page and to fix it I need to highlight Live Mode on the CD/USB and ...
1
vote
5answers
4k views

Ubuntu 12.04LTS stuck at login mouse and keyboard not responding

I have Ubuntu 12.04LTS installed on a dual-booted machine (i5 dual core 8G ram) and it's been working fine, but today for some reason when I logged out and tried to log back in it is stuck at the ...
1
vote
2answers
669 views

Login screen on my desktop error

When I log in my Ubuntu 13.04 account, my login screen still shows up as my desktop background, making my computer slow. Recently, I made some changes when I log in, such as removing both "Guest ...
1
vote
1answer
2k views

How do I get back the Unity login screen after installing gnome-core?

I installed gnome-core and now I have an ugly login screen. I want to reset or delete gnome-core and re-install the Unity login screen, or just switch back to LightDM. Is there any way to do it easily ...
6
votes
2answers
10k 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 ...
4
votes
3answers
2k views

How do you start-up in the login screen with Num Lock on? [duplicate]

Possible Duplicate: How to enable numlock at boot time for login screen? I use numbers in my password and would therefore like to start Ubuntu with Num-Lock enabled. This would also be ...
6
votes
4answers
1k 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? ...
6
votes
1answer
647 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 ...