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

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181
votes
32answers
309k 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 ...
0
votes
0answers
32 views

Cannot login as administrator after reinstalling Ubuntu 12.04 LTS

After reinstall Ubuntu 12.04 LTS on a laptop, a new problem arose: can no login as administrator. When trying to log in, Ubuntu just do not let enter, no errors, but can enter only as a guest. ...
1
vote
1answer
37 views

System Shutdown

After a recent update (not sure which/when) the login screen no longer has the cogwheel for shutdown. How do I restore it? I have three systems, only one (Toshiba laptop) has this issue.
0
votes
0answers
12 views

stuck in a login loop scree

My Ubuntu 16.04 is stuck in a login loop screen. When I login with virtual terminal by pressing CTL+Alt+ F3 I get to a point where I can in put my user name but cant enter password the cursor keep ...
0
votes
1answer
43 views

Unable to login to Gnome (-> login loop), only Unity login possible

I have a problem basically exactly the same as this one. What did I do? I wanted to try out GNOME and installed it according to this guide: sudo apt-get install gnome-shell sudo apt-get install ...
0
votes
1answer
24 views

Unable to login in Virtual Machine in ubuntu 15.10

I am using Virtual Machine Manager in Ubuntu 15.10. When I try to login after giving correct username and password the system is showing again the login screen. I can not use hot key because whenever ...
0
votes
0answers
14 views

KDE doesn't load on Kubuntu

I installed Kubuntu on flashdrive. After loading finishes and KDE doesn't start - I have blank screen. I don't even see a login screen. Alt+Shift+F1 goes to terminal. It worked previously but before ...
0
votes
1answer
114 views

14.04 Login Loop

I know there are already several questions about this problem. However, I did not find a solution using the answer already provided. I just installed Ubuntu 14.04 LTS dual-boot alongside Windows 8. ...
-1
votes
3answers
2k views

How to get Ubuntu to ask for my password at login screen again?

I used to have a password prompt but then I, from somewhere in User Accounts, unchecked "Require a password for login." Now, I want Ubuntu to prompt for a password again at login screen, mainly ...
2
votes
1answer
109 views

Restore Ubuntu 16.04 Login Screen

I installed Ubuntu Kylin Theme but I want to restore the original login in screen for ubuntu, I tried to uninstall the theme, purge and reinstall the lightdm and also change the default to gdm with ...
0
votes
3answers
48 views

Is it possible to login as root in this situation?

The Ubuntu server has been not used for about three months and it works not well. When I try to run it the start process stuck on "stopping system V runlevel compatibility". I searched this forum and ...
1
vote
0answers
28 views

ubuntu lockscreen issue

When I do Super + L in Ubuntu it locks the screen and original lock screen with white dots appears. Then after 30 seconds the screen goes black and when wake it up again lightdm greeter is shown ...
2
votes
0answers
50 views

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

The recipe for changing one's login screen in 14.04 doesn't work in 16.04. The "custom" background shows for a split second and then fades to the Ubuntu one. So, how do I change the login screen ...
0
votes
0answers
37 views

How do I get past my login screen?

When I boot up Ubuntu 16.04 LTS, I get shown my login screen. When I put in my password and press enter, I get a black screen that shows some letters for about half a second, then I am looped back to ...
2
votes
1answer
34 views

What is this second login screen?

Before being presented with the actual login screen, I am presented with another additional login screen. What is this second login screen? Actual login screen: Additional login screen: ...
1
vote
0answers
26 views

Change top bar and font scaling on login screen 16.04

How can I apply font scaling (or just change font size) and top bar scaling at the login screen? I've customized my settings so the to bar is thinner and text is smaller and I don't like that the ...
0
votes
1answer
4k views

Log in fails and returns to log in screen

I am running a very nearly fresh Gnome version of 12.10, with no particular tweaks or customisation. I performed an upgrade yesterday using sudo apt-get update; sudo apt-get upgrade which completed ...
0
votes
0answers
58 views

Ubuntu 16.04 Stuck at Boot loop after latest June 29 2016 update

Ubuntu 16.04 is stuck at boot loop. I have tried all forum thread about the discussion and none of the solution offered didn't solved the issue with the system. I have tried tty1 login and login ...
2
votes
0answers
28 views

Separate wallpaper for login screen and desktop? (16.04 LTS) [duplicate]

I've tried searching for an answer to this with no luck. I had a go at the method detailed here but as soon as I log out the new wallpaper is there for a brief second before it changes back to my ...
1
vote
0answers
20 views

login page going into loop in 14.04

I am only able to login into guest account. I tried ctrl + Alt + F1 , and got the terminal login. But its not accepting my credentials, the correct one. I am not able to sudo , Please suggest me ...
0
votes
0answers
21 views

Autologin with NFC

I would like to use NFC to login to Ubuntu. Here are the steps and my system is password protected. The user logs in for the day and place NFC card on reader. When user leaves they lock the ...
3
votes
0answers
40 views

Installed GNOME 3 ppa on Ubuntu 16.04 now cannot log-in to Ubuntu 16.04 anymore

I am running (or was) Ubuntu 16.04 and wanted to try out GNOME. I think I might have messed things up here by adding the GNOME 3 ppa. What I intended to do was get it so that when I restart, I would ...
0
votes
1answer
33 views

Ubuntu Windows10 dual boot problem

I had Ubuntu 15.04 and Windows 10. Both used to work well. I mainly used Ubuntu. I remember last time I booted into Windows 10 was a few months ago and there was no problem. A few days ago I upgraded ...
0
votes
1answer
177 views

Hide TTY1 login when using no “quiet splash” as GRUB_CMDLINE_LINUX_DEFAULT

I want to see the boot messages when starting Ubuntu, so I edited /etc/default/grub and removed the `quiet splash setting: GRUB_CMDLINE_LINUX_DEFAULT="" But now after those messages and before ...
4
votes
2answers
8k 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 ...
3
votes
4answers
11k views

Blank screen after entering password on login screen after clonezilla restore

I get a blank screen after entering my login password at the ubuntu login screen. And after a short while the login screen is restored. Any further attempts result in a similar cycle as before. This ...
0
votes
0answers
56 views

14.04 login-loop after installing NVIDIA driver .run file

So I have a Dell Inspiron 15 7559 (NVIDIA GeForce GTX 960M) running Windows 10 and Ubuntu 14.04 LTS. I was able to install Ubuntu from a live USB after having added the kernel parameters: quiet ...
9
votes
6answers
9k 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 ...
6
votes
5answers
3k views

After locking the screen in Ubuntu 14.04, password is not accepted, How can it be fixed?

I'm running Ubuntu 14.04 fully updated on my laptop. Since the last update every time I lock the screen (when leaving my room for example) - when I get back and input my password, it is not accepted ...
1
vote
0answers
39 views

Can't log into Ubuntu, takes me right back to login screen. Also computer runs in abnormally low resolution, possible graphics card issues

I feel like my problem will be best explained if I just tell you guys what happens. The short version: Upon boot, I get the /dev/sda message, font changes, then a messed up loading screen, an orange ...
1
vote
2answers
2k views

Can't log in Ubuntu 16.04 using Nvidia proprietary driver

I've recently upgraded from ubuntu 15.10 to 16.04. Here him my laptop details: Acer Inspire V nitro 17 Nvidia GeForce 860M RAM 6Gb As I was using nvidia driver on 15.10, after the upgrade I ...
0
votes
0answers
76 views

Critical freeze on login in ubuntu 16.04

Using an up-to-date Ubuntu GNOME 16.04 system on a msi cx70 sometimes on login screen I can have a freeze. After this I can only reboot machine or call console (ctrl-alt-f1). What can I do to fix or ...
0
votes
0answers
37 views

Make Lubuntu's login screen solid color

Since i3 appears to inherit the wallpaper from Lubuntu (16.04)'s login screen, I figure I need to change the latter. I followed these instructions, but to no effect. Not only do I not get the blue ...
0
votes
1answer
206 views

Ubuntu 14.04 login loop Unity terminated with status 1

I have ubuntu 14.04 and am stuck in a login loop problem despite trying the common answers to the multitude of questions on the site ,none have worked. I can't figure out what's wrong and would be ...
2
votes
0answers
43 views

Ubuntu Server 16.04 Login Username Field

I have already searched and was unable to find any documentation on this issue. I have freshly installed Ubuntu Server 16.04 on a machine that seems to have been built around 2009-2011. I used a ...
3
votes
1answer
3k views

Ubuntu 16.04 flickering and disappearing screen - tried everything!

Video https://youtu.be/W7hm5Iorw8s with the problem. Running Skylake/Nvidia gtx 950 on a clean install. I'm no expert at all and I haven't got a clue what to do. I've tried various things but nothing ...
0
votes
0answers
6 views

Login screen still of the previous one

I first installed ubuntu mate. Then switched to ubuntu 15.04. But the login screen still appears to be of mate. Plz tell me how to change it. And by login screen, i mean the screen where we type ...
5
votes
1answer
778 views

Enable [Fn]+[cursor arrows] on lock/login screen to change volume and brightness

Having a new Acer Aspire E17 E5-773G with Ubuntu 16.04 on it, I experience that the keyboard combinations to adjust volume (Fn + ↑/↓) and brightness (Fn + ←/→) do not work on the login screen or lock ...
1
vote
0answers
34 views

Login cause loop with error

I'm using Ubuntu 14.04 with Oracle VM on a laptop : GS60 6QE. Use to have graphic problem with Ubuntu, but at least I can work. Suddenly I can't login normally. I'm on it for hours now ... If ...
1
vote
0answers
38 views

14.04 hangs after login, no desktop

Mouse is still responsive, guest account can login and I can still login to my account through tty1. I've tried reinstalling ubuntu-desktop but it didn't change anything. I'm not sure what other ...
17
votes
14answers
59k 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 ...
1
vote
3answers
2k views

Ubuntu not accepting correct password

Sir, I am entering the correct password in Ubuntu, but the screen just blinks and again shows me the same login screen. Guest session works properly. What should I do?
0
votes
0answers
86 views

Ubuntu stuck in 15.10 upgrade- unable to login in tty1

On way to upgradation from 14.10 to 15.10 , Ubuntu got stucked in a graphics less window. Then after restart can't login - showing login error in tty1. Tried several codes but login error. May be for ...
0
votes
0answers
53 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 ...
0
votes
0answers
27 views

howto resize the ubuntu logo in the login screen 12.04

how can i resize the area reserved for the Ubuntu logo in the login screen. I managed to change the logo and replace it with mine, except that mine is a squared image file with much bigger dimensions ...
0
votes
0answers
16 views

Keyboard works in bios but not Lubuntu

Works in bios, but not 14.04.4 login screen. Any ideas why? No installing other OSs please (looks at my dad) and I have a spare keyboard to use. It is a small netbook.
0
votes
2answers
708 views

Problems with login after startx command

I am running 14.04. after typing startx command i cannot login same account again. Login screen is repeatedly showing. I can login with guest section but i can not login to my another section . i ...
4
votes
3answers
5k 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
0answers
172 views

After login Desktop not showing 16.04

I am using ubuntu 16.04 and I have installed kali linux on top of that using katoolin, after restarting I can enter the password but desktop showing blank no icons. I used below command no use. Please ...
1
vote
1answer
157 views

Login Loop for Guest Account only on 16.04

I have some 40 Dell Latitude E6410s I maintain in my classroom for student use. I have successfully setup and used special 'guest' accounts so the directories are wiped between uses. This scheme ...