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Questions tagged [login-screen]

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

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480
votes
47answers
939k views

Ubuntu gets stuck in a login loop

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've read that the problem might be caused by ...
290
votes
44answers
901k 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 ...
114
votes
15answers
62k 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.
101
votes
10answers
161k 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 ...
101
votes
1answer
139k 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?
40
votes
7answers
84k views

How do I change the login screen in Ubuntu 16.04+?

The recipies for changing one's login screen in 14.04 [EDIT or in 15.04, 15.10] don't work in 16.04. The "custom" background shows for a split second and then fades to the Ubuntu one. So, how do I ...
38
votes
2answers
56k 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?
32
votes
15answers
120k 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 ...
31
votes
7answers
9k 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.
30
votes
2answers
26k views

Personalize monitor position before login

I'm using multiple monitors. When logged in everything is fine: The left monitor is positioned to the left and the right monitor is positioned to the right, but before I log in, the login-screen ...
29
votes
7answers
48k 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?
25
votes
0answers
21k views

Ubuntu 18.04 stuck at purple screen after login [closed]

Sometimes, when logging in after rebooting or when switching between users, after typing the password and confirming, I get stuck at a purple screen. Sometimes I can escape it with ctrl+alt+F3 ...
24
votes
5answers
29k 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 ...
24
votes
10answers
127k views

ubuntu 14.04 login loop problem

My Ubuntu 14.04 is stuck when trying to login my desktop. The screen goes black and soon after that the login screen comes back. I followed all steps in Ubuntu gets stuck in a login loop but the ...
23
votes
9answers
10k views

Accidentally modified .bashrc and now I cant login despite entering password correctly

I messed up bigtime with the bashrc file. I was installing Gurobi and I had to set path variables in the bashrc file. So, I replaced all the text in bashrc with the path variables and saved the bashrc ...
23
votes
6answers
52k 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 ...
22
votes
2answers
529 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 ...
22
votes
2answers
50k 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 ...
22
votes
3answers
9k views

I consistently get two login screens

I consistently get two login screens! I enter credentials correctly and am immediately presented with a second login screen (no errors). Authenticating against the second screen completes a ...
20
votes
7answers
24k views

rotated monitor. login screen needs rotation

I rotated my screen, and 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? ...
19
votes
2answers
8k views

No symbol table. Press any key to continue

Whenever I boot Ubuntu 16.10, just before the Plymouth screen, I'm seeing this message: No symbol table found. Press any key to continue... and it remains there for a minute or so before showing me ...
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 ...
18
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. ...
17
votes
6answers
18k 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 ...
16
votes
1answer
2k views

“Authentication is required to update SMART data from” in 16.04

I upgraded to 16.04 [Ubuntu Gnome]. I am using a Lenovo Y700 with a GTX960M. After suspend or closing the lid I ended locked outside the login after that message appeared. It happened twice today, I ...
15
votes
4answers
6k views

Ubuntu 15.10 randomly crashing back to login screen

fresh install of Ubuntu 15.10 here. Everything works fine, but I'm getting random crashes back to the login screen. I pasted my syslog here: http://paste.ubuntu.com/12989589/ Edit: Confirmed bug on ...
14
votes
3answers
52k 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 ...
14
votes
8answers
85k views

After Upgrade from 14.04 to 16.04 login screen runs in a loop while console login works

I am on a DELL Precision 5510 Ubuntu Edition with Ubuntu 14.04 as default installation. Today I upgraded from 14.04. to 16.04 as shown here The upgrade went without any error messages. However, after ...
14
votes
7answers
8k views

Login screen password language

I have ubuntu 12.04, and 2 languages on my keyboard. Every time the screen goes black it requires my password, which is in English. But the language set is the one I have used last. How can I make it ...
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 the ...
12
votes
7answers
53k 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 ...
12
votes
4answers
351 views

Set a password, yet it logs in without one

My account is an administrator; I'm using Ubuntu 14.04LTS. I've set a password and set automatic login to OFF, yet when I wake up from suspension or reboot if I just press Enter or type in anything ...
12
votes
1answer
298 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?
12
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 ...
11
votes
9answers
33k 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 ...
11
votes
2answers
17k 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 ...
11
votes
4answers
17k views

Is there an alternative to Windows Hello for linux

I purchased an alienware 15 r3 which comes with windows hello enabled which means all hardware included. I have installed Ubuntu 16.04 and couldn't find any package that can substitute for windows ...
11
votes
3answers
39k views

Disable sleep mode after 5 minutes

I have Ubuntu 14.04 installed on my laptop. When I have my laptop plugged in to my tv to watch a movie, the screen goes black after exactly 5 minutes. I have to move the mouse, to see I'm at the login ...
11
votes
2answers
2k 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, ...
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
10answers
74k 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 ...
10
votes
2answers
8k views

Cannot change login screen background in 18.10

I changed both the desktop and login screen background photos. However,only desktop photo is changed. The one on the login screen is still the purple Ubuntu one. Is this a bug?
10
votes
3answers
9k 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
10
votes
4answers
18k 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 ...
10
votes
3answers
7k 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 ...
10
votes
2answers
1k views

Can sign in to xfce but not to Ubuntu Desktop environment after update

I recently updated my Ubuntu 14.04 installation and upon rebooting I am no longer able to sign into the Ubuntu Desktop environment. I've tried several approaches such as: renaming .Xauthority and ...
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
5answers
14k 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, ...
9
votes
2answers
20k views

Unity greeter does not display custom wallpaper

I am using Ubuntu 14.04 LTS 64 bit . I know this question has popped up many times but I want to make it very clear that none of the posts helped me a bit. my Problem: I am unable to get my custom ...
9
votes
1answer
11k views

How do I change login screen purple color to another one or image (if possible) on Ubuntu 17.10? [duplicate]

I want to know if it is possible to change the login screen background to an image, or if not, how to change the color from the default.