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

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0
votes
0answers
17 views

Cannot login user in visual screen but can login in terminal mode

Im trying to login through visual screen into my user, but it seens Ubuntu is not recognizing my password. I already change it throught root user from recovery mode, and I tested it in the alt+ctrl+f1 ...
0
votes
2answers
40 views

Ubuntu 14.04 won't let me login

Yesterday I was updating some applications. I come back later and I see a red stop sign on top of my screen that stated there was an error. It said that some of my packages needed some dependencies. I ...
21
votes
2answers
20k 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?
9
votes
6answers
22k 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 ...
0
votes
0answers
22 views

Very Novice - Can not login after upgraded from 12.10 to 14.04.1

So I opened the cmd prompt and have gotten as far as login to the computer's Directory, but it won't let me on to the desktop. Every time I try my password there it says it fails and to try it again. ...
0
votes
1answer
19 views

black screen startup. Try Ubuntu now asks for password

So I have a Toshiba Satellite laptop that I just tried to fully install Ubuntu 14.10 (I think, most recent) on. When I originally clicked Try, everything would load as expected. So I tried to ...
1
vote
1answer
903 views

Cant log in to gui ,X is broken

Note to others if you just want a summary of the problem skip down to summary. This first part is going to be slightly long and hopefully entertaining. As in, that is screwed up! but there might be ...
0
votes
0answers
12 views

How do I set the background for lightdm-kde-greeter

I'm running Gnome desktop in 12.04 and installed the lightdm-kde-greeter. But I'm not sure how to change the background. Google has been no help, as all the suggestions say to go to the System ...
0
votes
0answers
92 views

Ubuntu 14.10 Lightdm greeter resolution before login

There are various answers for changing the resolution of the Lightdm greeter before login by adding a root executable script to /etc/lightdm/lightdm.conf like this: [SeatDefaults] ...
1
vote
0answers
15 views

How can I use the default LightDM login screen with GNOME Shell? [duplicate]

I would like to keep the normal Unity log-in screen and everything. When I installed GNOME Shell, it seems to have replaced the log-in screen with the GNOME one. I like jumping between different ...
0
votes
1answer
38 views

Unity Greeter starts with a black output Screen

The unity greeter in my Ubuntu 14.04 laptop starts with a black output screen. When I say this I mean every error and output of the greeter is printed on the screen but the GUI is not visible. What I ...
3
votes
2answers
5k views

How does “Accounts Service” work with lightdm?

I have added two users using the command useradd but they do no show up in the lightdm/unity-greeter login screen. So there is no way to graphically login for them. It seems Accounts Service ...
0
votes
1answer
63 views

lightdm-gtk-greeter keeps loping into login screen

Since I had problems with unity-greeter I had installed lightdm-gtk-greeter and it keeps looping into the login screen. 14.04 ubuntu I have several solutions: removing .Xauthority file, reinstalling ...
1
vote
0answers
22 views

login screen problem related to user partition

Every time I switch on my pc, I see the screen message: user/local disk cannot be found please mount it manually or press 'S' to skip What I did was I created a /home partition and local/user ...
0
votes
0answers
114 views

Several attempts to customize GDM login screen in Ubuntu 14.04 LTS failed. What are the ways to customize it?

I installed GDM on Ubuntu and set it as default via sudo apt-get install gdm. It looks like this( I took screenshots but can't trace where was it saved as it was not available in default directory ...
1
vote
3answers
506 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 ...
1
vote
1answer
1k views

Disable second screen on the login screen but enable once login has completed

I currently run Ubuntu 13.04. I recently got a second screen for my computer and I have noticed because they are different resolutions (one is 4:3, one is 16:10) the login screen is duplicated and ...
0
votes
1answer
25 views

Garbled image after login

I have had for quite a long time this issue. The login wallpaper (in LightDM) is gone, and after I input the password the screen goes all garbled (see screenshot here) and it stays there for five ...
0
votes
0answers
8 views

Adding a 'help' button to the logon screen

I would like to add a custom 'help' button to the logon screen of Ubuntu 14.04. When this button is pressed, I want it to display a text box. And I only want the button to be present at the logon ...
0
votes
2answers
211 views

Ubuntu 14.10 black screen at login

I have a fresh install of Ubuntu 14.10 on my laptop Compaq 420, just a while ago. At login screen, it suddenly becomes black for a split second and then shows it again. Or sometimes, it appears after ...
0
votes
2answers
29 views

how to log on/off from ubuntu user to windows user without closing computer completely

i want to know if its possible to log on/off from ubuntu user to windows user without closing computer completely like when in windows win+l open user logon screen then you choose your win user then ...
1
vote
3answers
4k views

Xubuntu 13.04 X Login Loop

All of a sudden, I am no longer able to login to an X session in my Xubuntu 13.04 install. The graphical login accepts my password, the screen goes blank and then returns to the login prompt. A bit of ...
0
votes
2answers
98 views

How to fix Ubuntu 14.04 LTS login screen hangs with “logging in…”

Anyone have suggestions for this: I upgraded my Ubuntu system to 14.04, and the upgrade failed miserably. I was forced to restart the system in order to get to a login. After following several ...
1
vote
5answers
5k 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 ...
2
votes
1answer
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 ...
0
votes
0answers
21 views

lightDM GTK greeter won't log in unless root

I've been building an Ubuntu distro from the ground up, and I decided to use the LightDM GTK Greeter. Everything is going good, until I decide to log in to the non-root account. If I try to log in to ...
0
votes
1answer
42 views

Stuck in a user log-in loop on startup (fresh install)

So I wanted to set up my Lenovo Flex 2-15D to dual-boot Ubuntu alongside the pre-installed Windows 8.1. I installed the Universal USB Installer from pendrivelinux.com, created a USB stick loaded with ...
2
votes
2answers
5k 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 ...
1
vote
1answer
152 views

How to set GNOME as my default desktop environment?

I just downloaded GNOME-Shell. And at login screen it's give me to choose to set desktop environment, But I want to set GNOME as my default desktop environment. Although I tried the possible ...
0
votes
1answer
8 views

how to unlock screen when booted from usb?

i installed ubuntu 13.10 in the installation process i lost all data. i booted from the usb and took the help of testdisk. sudo apt-get install testdisk sudo testdisk After finding all the ...
0
votes
0answers
20 views

Progress bar in my login screen

I have a problem. After boot system, my login screen show a progress bar. If I do nothing is performed automatically login. Look: How to remove it?
0
votes
0answers
19 views

Ubuntu login page doesn't load

my Ubuntu 12.04 doesn't load the login page anymore. I'm using it in double partition with Win7 and after I select Ubuntu from the grub, it only appears the preliminary loading and then black screen. ...
0
votes
1answer
164 views

Ubuntu 14.04 desktop not loading after login

Turn on the PC, get normally to the login screen. But when I login, the desktop doesn't seem to load. I've waited half an hour but it still didn't load. I can get to the root by using the GRUB screen ...
0
votes
0answers
29 views

Keyboard and mouse unresponsive at login screen

Running Ubuntu 14.04 for a couple of weeks and now the keyboard and mouse has stopped working. Works well when booting, can access and change boot settings, but as soon as I reach the login screen it ...
0
votes
0answers
12 views

How to find what prevent my computer from unlocking?

When asking for my UNIX password at the login screen, entering the right password won't unlock it but it does the sound as if it's happy and don't give an error message. Here are the last things I ...
0
votes
0answers
18 views

Black screen after the purple load screen

I'm using ubuntu 12.04. I just restarted it, and it goes to the purple screen. What happens there is unusual, because it just stays purple for about 3-4 seconds, which never happens. Then, it shows ...
126
votes
37answers
364k 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 ...
0
votes
0answers
28 views

Cannot see login after upgrade to ubuntu12.04

I just upgraded my ubuntu from 11.10 to 12.04 and cannot login anymore. When the login screen should appear i can only see a pink screen with vertical lines, which get black or white when I move the ...
1
vote
1answer
57 views

How to edit the text that appears on the Unity login screen?

I was previously using Ubuntu 13.04 and had done PostgreSQL Advanced Server installation which edited my Unity login screen to include its title. I've since uninstalled that proprietary version of ...
0
votes
0answers
25 views

Login screen only appears every other startup

While doing some work on my system that involved working with filesystem groups, I accidently changed my user gid to another group. I've since changed it back, and on login everything seems fine so ...
1
vote
1answer
42 views

Login screen bumps back to login screen

Ubuntu froze, so I had to perform a hard-reboot. But then when I tried to login, all I see is a brief Nvidia splash screen and then it reloads the login screen. I'm completely locked out of Gnome ...
0
votes
1answer
2k views

Not loading desktop from login screen

I was using Ubuntu 12.10 for quite a long time. But from a few days back, I am unable to go to the desktop. The Ubuntu is loaded and the login screen is shown. Even after entering the password, the ...
0
votes
0answers
35 views

Ubuntu 14.04 boots to black screen [duplicate]

I have installed Ubuntu 14.04 LTE on my HP Pavilion desktop with Nvidia graphics card. When I switch on my computer, it seems to boot normally at first, until the Ubuntu “coloured dots” screen ...
0
votes
0answers
33 views

Can't access my desktop after power failure of update

I had a power failure while upgrading Ubuntu 13.10 to 14.10, and I got: Filesystem check or mount failed. A maintenance shell will now be started. CONTROL-D will terminate this shell and ...
0
votes
0answers
62 views

Changes Made in Dconf Editor don't take effect?

I am using Dconf to remove myself from the login screen by enabling disable-User-list in org.gnome.login-screen but that don't work. Also, I have tried changing the logo, no luck either. I have also ...
2
votes
2answers
1k 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 ...
0
votes
0answers
76 views

Upgrade from 12.04 to 14.04, re-activation of 3rd party sources, login doesn't show up

I've just upgraded from 12.04 to 14.04. It went all fine, also the restart. Then, I re-activated some third party packages sources, and I did some updates. Afterwards, ubuntu doesn't start. The screen ...
0
votes
0answers
160 views

Upgraded this morning, now stuck with no X login

So... have had a fully functional Ubuntu 14.04 system installed dual-boot with Win 7 on my Lenovo T530 ThinkPad for months... 12.10, 13.04 & 13.10 before that. Some hiccups with 14.04, but overall ...
0
votes
1answer
192 views

How to enable “Other” or “Manual” user login in ubuntu 14.04.1? [duplicate]

I found the other one with the lightdm thing but it doesnt work because its for 12.04! does anyone know how to enable the manual login like in XUbuntu where you can type in the user and the password? ...
3
votes
1answer
42 views

What file specifies the desktop environment for a user?

I'm having problems with Unity on a slow laptop, but it's configured to autologin so I never see the login screen. Also, the screen or display driver is messed up so I don't see the far right part of ...