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

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1
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0answers
4 views

Challenge-response local user login

Is it possible in Ubuntu, or in any Debian based distro, to use Digital Signatures with a Challenge-response setting for local user login(I don't mean ssh), instead of a password ? Storing the key on ...
111
votes
26answers
157k 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 ...
0
votes
1answer
5k views

Login loop, can only login as Guest. Ubuntu 12.04

My computer wont allow me to login unless its as guest. I have pressed ctrl+alt+f1 and can login using my administrator account there, but not in the normal interface. I have done updates and ...
0
votes
1answer
16 views

How to reinstall Ubuntu 14.04's default login screen [duplicate]

I was playing around with the different Window Managers and I ended up uninstalling the default login screen (I think) How can I reinstall that without reinstalling the whole distro?
0
votes
0answers
12 views

hanging at login screen and during working

I have ubuntu 15.4 and I have problem at login After typing my password the laptop hangs about 5 minutes at login screen then shows the desktop . And during working it hangs 5 to 10 minutes and ...
3
votes
5answers
6k 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 login ...
0
votes
0answers
54 views

One time loop on re-login after locking ubuntu 14.04?

When I lock/sleep my computer (laptop running Ubuntu 14.04) this works fine but when I go to re-login and enter my password I get a loop back to the login screen. After I enter my password a second ...
2
votes
1answer
39 views

Can't log in in Ubuntu 14.04 after install realtek drivers

Environment Ubuntu 14.04 Kernel 3.16.0-46-generic I had a problem with wifi network and I try to install drivers from github rtlwifi_new and then I had a huger problem, because now I can not log ...
9
votes
3answers
747 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 ...
2
votes
2answers
612 views

My ubuntu system is asking login again and again when i even entered the correct login details?

I am using Ubuntu 12.04 in Dell desktop. I am unable to login into my desktop. when i enter my login details its just coming again to login page without entering into my dashboard? Please help me...
0
votes
0answers
20 views

I start off in TTY7, but end up in TTY2, how come?

When I start my machine, I first see that I am in TTY1, and then the mouse appears and I am in TTY7. It's a little odd, but doesn't bother me too much. However, and I think that this only happens ...
1
vote
3answers
62 views

ubuntu will not let me set login page background

I want to change the background image of my Ubuntu (14.04) login screen, but Ubuntu doesn't display the changes. I tried changing the background in dconf-editor which resulted in there being no ...
2
votes
0answers
1k views

How can I use the recovery console to start a session step by step? [closed]

If you select "Recovery Console" at the GDM login screen, you are presented with a terminal screen in the top corner of the screen and the usual GDM background. I'm trying to diagnose a problem which ...
0
votes
0answers
27 views

I can't access my login screen. After the splash screen, my screen turns white

After my splash screen, the display shows 'starting version 219' and my entire screen goes white and no login screen appears. I'm able to access tty. When I tried to start lightdm from there I got: ...
0
votes
0answers
28 views

Login screen password incorrect

Since the last ubuntu update I cannot login anymore, each time I have a "password incorrect". I open a terminal and updated my password with passwd user, the password works fine in a shell, but still ...
0
votes
0answers
25 views

Nvidia driver causing login loop

I have a Lenovo y50 with an integrated GPU as well as an Nvidia 860m. Lspci says that I am using the integrated card but it uses the Nvidia for 3D. Looking at other threads I have tried to install ...
0
votes
0answers
133 views

Ubuntu 14.04.2 login screen loop back

I have a login screen loop back problem, when I punch my password I get back to the login screen again. I have tried to login with LightDM CI screen by Ctrl+Alt+F3 but there when i put in the username ...
0
votes
0answers
23 views

How to translate missing parts of danish language in kubuntu

fellow ubuntu users. I will start by saying that i love KDE, especially the new 5.3 - looks & works amazing! But there are many untranslated words, that shows up in English - and that irritates ...
1
vote
2answers
20 views

Ubuntu Screen rotation of 90° after successful login

As mentioned above, my screen loves to rotate 90 degrees after login. Standard Ubuntu installed. This input turns it normal again: felix@felix-LIFEBOOK-T4220:~$ xrandr --output LVDS1 --rotate normal ...
2
votes
2answers
443 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 ...
1
vote
1answer
40 views

Admin Account Missing after 'shutdown now' Exit

So, I have been learning PostgreSQL and messing around with creating DB's, users, and switching between both with Konsole. Last night, I shut down the computer with the command 'shutdown now'. After a ...
1
vote
0answers
19 views

Webkit-greeter only changes after a restart, not when logging out or locking computer

On Ubuntu 14.04, I installed the lightdm-webkit-greeter using sudo apt-get install lightdm-webkit-greeter then, I did the following to get the greeter I wanted: cd /usr/share/lightdm-webkit/themes/ ...
0
votes
0answers
26 views

No dash, login loop [duplicate]

I am running Ubuntu 15.04. I get to the login page, type in my password (Unity is visible at this point), I then go to a blank page with my wallpaper and my cursor. After about 5-10 seconds the screen ...
1
vote
0answers
53 views

Log in with password not working(Lubuntu-15.04)

I have enabled the Password:asked on login from the users and groups available in the system tools. But however it's not working for me. When I login to lubuntu it automatically goes to the session ...
0
votes
0answers
58 views

Cinnamon on Ubuntu 14.04 - black screen after logging

I use Cinnamon with Ubuntu more than a year, but yesterday new error came: A few seconds after I started Ubuntu and logged in my profile with Cinnamon, it loads just a black screen, and then a logon ...
0
votes
0answers
11 views

Timekpr preventing shutdown

Recently Timekpr, a parental time restriction program has been installed on my computer. While i can shutdown while logged in, when i try to shutdown from the login screen after being kicked out, ...
0
votes
0answers
77 views

Ubuntu freezes, CPU soft lockup, intermittent screen artifacting

I am relatively new to Ubuntu and I am having a few issues, regarding the software or my computer I don't know. A little bit of background - I am dual booting windows 8.1 and Ubuntu 14.04.2 and I ...
-1
votes
3answers
182 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 ...
0
votes
0answers
22 views

Login Loop Revisited Ubuntu 14.04

Ubuntu 14.04 I7 Toshiba Qosmio I know many of you have already answered people's questions about the login loop, but I am still stuck in this mode: When I try to login with my username and password ...
0
votes
1answer
153 views

Cannot login into Ubuntu 14.04.2 LTS Username tty1 screen

Got an error about missing /tmp. I choose the option to fix the problems. That did not work and now everytime I boot, it takes me to Ubuntu 14.04.2 LTS [username]-ThinkPad-T440s tty1 ...
0
votes
1answer
101 views

14.04 couldn't log in

I couldn't log in to my user account. When I tried it the screen returned to the log in screen. I am able to log in using ctrol alt f1 or an new created account, but not my own. Also rm /.Xautority ...
0
votes
0answers
49 views

Ubuntu 14.04 log in fails and returns to log in screen, and runs in a very low resolution

After installing a recent update (Can't tell you any details since I can't access anything), I can no longer log in on Ubuntu 14.04. I just get booted back to the login screen after a second or two ...
0
votes
0answers
31 views

Change log-in screen

I wanna change my log-in screen to something that I can personalise to my own liking. I'm on Ubuntu 15.04 Vivid Velvet recently updated from 14.04. Before 14.04 I ran linux mint on my laptop and in ...
155
votes
39answers
448k 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 ...
1
vote
5answers
3k views

ubuntu 14.04 login loop problem

My Ubuntu 14.04 is stuck, when trying to login my desktop. Means the screen gets black and soon after that the login screen comes back. I followed all steps in Ubuntu gets stuck in a Login Loop Even ...
2
votes
0answers
27 views

Udev rules for USB mounting and Low Graphics Mode error

I have a file containing the content bellow KERNEL!="sd[a-z][0-9]", GOTO="media_by_label_auto_mount_end" # Import FS infos IMPORT{program}="/sbin/blkid -o udev -p %N" # Get a label if present, ...
0
votes
1answer
39 views

All flavor of Ubuntu 15.04 goes to sleep on login screen?

After boot and the login screen is showing up, my laptop immediately goes into sleep even when I'm typing my password. I have used Ubuntu since 2010 on this machine, this is the first version that ...
0
votes
1answer
49 views

Another password prompt when waking from suspend

After upgrade to ubuntu 15.04, I have to enter password for twice to unlock my system when it wakes up from suspend. The first password prompt looks weird, I've never seen it before and have no idea ...
0
votes
0answers
19 views

Login screen does not fill monitor

For some reason, my login screen does not fill up my entire monitor. After I enter my password, the screen goes all glitchy and weird for a few seconds, then it logs me in and everything is normal. ...
0
votes
1answer
20 views

14.04 USBs powered off at login screen

I'm using Ubuntu 14.04 LTS with a Dell normal desktop PC. I've been suffering this issue from the very beggining. Randomly, the USBs ports seem disconnected/powered off at the login screen, before ...
0
votes
1answer
17 views

Are there still issues with re-logging after desktop lock in Ubuntu 15.04?

Following my previous question in the subject and since no solution has been found: I was wondering if there are any users of Ubuntu 15.04 which are experiencing this issue?
0
votes
3answers
60 views

My linux won't let me get in as user or even as a guest in login screen

I opened my computer and it was good and all , but then when my desktop was supposed to appear , there was some kind of log in window that has 2 options, to log in as my user name or as a guest. The ...
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.
0
votes
0answers
88 views

Ubuntu 14.10 Login Background Error

I wanted to try and change the background of the system at the login screen, so I searched the web for where it was. I found that it was a file called warty-final-ubuntu.png. I replaced it with a .png ...
0
votes
0answers
133 views

infinite loop at login screen on Ubuntu 14.04.2

My laptop always opens without requiring password, but login screen came out when i was trying to open my laptop. My password was 100% sure true, but i could not login, first black screen appeared and ...
0
votes
1answer
52 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
1answer
66 views

How can I change the date format in the Lubuntu login screen?

I'd like to set a different format for the long date string I get at the top of the login screen in Lubuntu (15.04). How do I do that?
0
votes
0answers
105 views

Ubuntu Studio Upgrade to 15.04 Degrades Login Screen Format

I upgraded Ubuntu Studio to 15.04 from 14.10 this week. At login (the greeter?) the screen[1] is uniformly grey. There is no login dialog. Before the upgrade, the dialog appeared on the login screen. ...
0
votes
1answer
53 views

Cannot login from lock screen

On a new 14.04 setup I am having an issue where I cannot login from the lock screen. When my screen locks, the only way I can login is by selecting to login as a different user, which takes me back ...
0
votes
1answer
52 views

Why does the screen go dead until I press escape every time I boot up?

I have Ubuntu Studio 14.04, it is the only operating system on my machine. Every time I boot up, the BIOS loads, and then the screen goes dead and will stay that way unless I press ESC, in which case ...