lightdm interview questions
Top lightdm frequently asked interview questions
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 an error depending on the graphics, here's my graphics card: ATI Radeon 7670M
Source: (StackOverflow)
I don't want to expose my wallpaper to other people who share my computer, is there a way I can disable this feature or work around it?
Source: (StackOverflow)
I recently added Cairo Dock to my GNOME Shell in 11.10. Cairo Dock is GREAT, but I'm left with one little problem that I'd like to fix: after installing Cairo Dock, LightDM includes two extraneous entries to non-working desktops. (The entries to working desktops remain unaffected, so I guess I could just ignore the extraneous entries, but...)
So I'd like to remove/edit the extraneous entries in LightDM. I've looked and looked for discussions on how to do so, but haven't had much luck.
Any suggestions on how to go about editing the login menu in 11.10?
Source: (StackOverflow)
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 drivers,
incorrect or invalid lightdm greeters, low disk space, incorrect
installation of graphics card like ATI and Nvidia, incorrect
configuration of xorg.conf file while setting up multiple monitors
among others.
If you are experiencing the "low-graphics mode" error when trying to
login but none of the following answers work for you, please do ask a
new question and then update the answers of this canonical question as
and when your new question gets answered.
When I try to boot into my computer, I am getting this error:
The system is running in low-graphics mode
Your screen, graphics cards, and input device settings could not be
detected correctly. You will need to configure these yourself.
How do I fix the failsafe X mode and login into my computer?
Answer index:
Source: (StackOverflow)
How do I disable the guest session in Ubuntu 11.10 or higher? I don't want people to be able to use my computer without using a password to log in!
Source: (StackOverflow)
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.
Source: (StackOverflow)
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?
Source: (StackOverflow)
When autologon is active, lightdm will start the Unity 3D session, not the 2D (or any other shell that I want to auto-login to).
Is there a way to start the shell I want automatically (autologon)?
Anyway, if autologon is disabled, the last used session is launched, and that's fine. I just want to choose which is default with autologon.
Source: (StackOverflow)
When there's trouble, it might be good to understand what happens under the covers to sign a user into a GUI session and get a Unity (or other window manager) to bring up a desktop.
Source: (StackOverflow)
I am learning about Graphical User Interfaces in Ubuntu and constantly come across different terms, which cause a lot of confusion for me. I have tried reading easy-to-understand tutorials about the relationship between the named packages, but I don't have a complete picture.
LightDM appears as a service on my installation and is a 'Window Manager', how is this related to Compiz, which is also a Window Manager but not a service? Is Metacity also a Window Manager?
Then there comes Gnome 3, Unity, Gnome Shell and Gnome - all of which seem to be different things. Please help me understand the relationship between all this terminology.
Source: (StackOverflow)
How do I hide a particular user from the login screen on a default install of 11.10 and higher? (ie. using Unity Greeter)?
Source: (StackOverflow)
I downloaded a couple greeters for LightDM, but I have not figured out how to enable them. Is there a way to switch greeter, either by graphical or command-line method?. I do not intend to change display manager, nor the background, but to change the layout and appearance of the login screen through a different "theme" (greeter is the name for LightDm themes). Thanks for your time.
Source: (StackOverflow)
The command sudo service gdm stop would successfully disable the X server in Ubuntu 11.04 temporarily.
However, this same command no longer works in Ubuntu 11.10, because "gdm" is an "unrecognized service" according to Terminal. How, then, do I disable the X server in Ubuntu 11.10?
Source: (StackOverflow)
Excuse me if this has been answered already, but I couldn't find any questions quite matching my issue.
On the odd occasion, usually after incorrectly restarting my computer, my login screen resolution is not the default 1440x900, but I think 1600x900. Now, I have this monitor that's really bad at handling resolutions it's not designed to handle, and will show a silly "wrong resolution" box jumping around the screen.
Is there any way to make the login screen load a 1440x900 resolution no matter what? I'm running Ubuntu 11.10 with Unity and LightDM.
Source: (StackOverflow)
I used to modify /etc/lightdm/lightdm.conf, adding the line greeter-show-manual-login=true, in order to allow login for hidden users and root.
Now I've just installed the new Ubuntu 14.04 and the file lightdm.conf is no longer located in /etc/lightdm. It's in /etc/init and has been totally modified.
How can I force lightdm login screen to show a field to input a login name?
Source: (StackOverflow)