Questions tagged [lightdm]

LightDM (Lightweight Display Manager) is a Display Manager for the X.org X server. It is the default X display manager of Ubuntu. LightDM starts an X session and presents the user with a graphical login screen, so the user does not have to issue commands such as `startx` to start the X server

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unity-greeter resolution will not change

i am using i3 and lightdm, which comes with the default unity-greeter. i have been battling for days now in trying to change the resolution of the greeter. It is stuck at 800x600px I have googled and ...
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Can't log back in to only my account after switching to another user in lightdm on xubuntu

My family has a shared computer were we all have accounts. This is an Xubuntu 20.04 system running lightdm as the user manager. For whatever reason, whenever I login to my account, then lock the ...
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Xfce not taking up full width of display on Xubuntu

I'm having this problem I can simply only describe visually, like so: Googling the error came to nothing. lightdm also exhibits this behavior but switches back and forth from this to the proper ...
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Can I use Wayland on my nVidia machine?

I have a laptop with an nVidia RTX 2080 and the 440.64 driver. I have both lightdm and gdm3 installed and am running Ubuntu 20.04 which means as of today I have just about the latest hardware, ...
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when using LightDM, who calls /usr/sbin/lightdm-session

I was wondering who actually calls /usr/sbin/lightdm-session during the startup proccess. It seems be hard-coded in LightDM somewhere to execute this script when a user log in and a new session is ...
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Can't type password in log in screen after installing lightdm. Switched to Xorg from Wayland

I had some trouble running team-viewer, so I followed this advice. I installed lightdm sudo apt-get install lightdm and changed the setting to 'lightdm'-Xorg. Previously it was Wayland I believe. ...
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Lockscreen issue after adding Xubuntu-desktop — can't log in

On top of Kubuntu 20.04, I installed Xubuntu-desktop from terminal. When prompted, I selected lightdm. I did not create a new user. Now, when the session locks after inactivity, sometimes I can't ...
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lock screen when screensaver is deactivated? gdm3

Is it possible to lock screen AFTER screensaver is deactivated in dgm3? I was using lightdm/light-locker what had this setting Ubuntu LTS 20.04 GNOME 3.36.2
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1answer
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Disable screen locking with xubuntu 20.04 and lightdm

I just installed Ubuntu 20.04 and then installed xubuntu-core. When prompted, I chose lightdm as my login manager. I then disabled everything I could find related to screen locking, but I still have ...
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Confgiuring Ubuntu 20.04 with LightDM - How to enable lock screen

I want to use lightdm on Ubuntu 20.04. After installing lightdm and logging in to the desktop environment, I get a message saying Screen Lock disabled Screen Locking requires the GNOME desktop ...
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gdm3 login loop, lightdm works in Ubuntu 20.04

A lot of people seem to have this issue, and many people have been able to fix it, but I have used every fix (besides reinstalling Ubuntu or creating a new user and moving stuff over) and have not ...
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1answer
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Ambidextrous mouse in greeter?

I'm currently running light-dm-greeter, and all is fine, except this computer is shared between left and right handed users. I cannot figure out how to configure light-dm-greeter to allow both left ...
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TurboVPN for ubuntu server and set the only avaibile desktop to be xfce4 for all users

I am setting up a new Ubuntu server for several users My target is everyone could connect it with the TurboVPN by the server IP when user login to it, it will show the login screen to users and enter ...
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1answer
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Xubuntu 20.04 LTS Cant Change Login-Screen Resolution (Thinkpad P50)

I recently got a ThinkpadP50 with a fresh Xubuntu 20.04 LTS install CPU: Intel i7-6820HQ (8) @ 3.600GHz GPU: NVIDIA Quadro M1000M, using nvidia-driver-440 However, I'm having an issue where my lock ...
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Can't lock screen with shortcut on Ubuntu 20.04 gnome

In shortcuts i have Super + L for locking screen. But on pressing it - nothing happens. In syslog: gsd-media-keys[1979]: Couldn't lock screen: Cannot invoke method; proxy is for the well-known name ...
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login stuck after removing mate-desktop on ubuntu 20.04

I just installed Ubuntu-mate-Desktop with this command sudo apt install ubuntu-mate-desktop) and removed it with this sudo apt remove -y ubuntu-mate-desktop mate-* ubuntu-mate-* plymouth-theme-...
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I can't first login to desktops installed with Tasksel and Lightdm- Ubuntu Server 20.4

First of all, I am new to Ubuntu. I have installed Ubuntu server 20.4. After the install it asks for a new password which I did. Changed to my new password and it is working since I have logged in a ...
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Apparmor is missing profile for LightDM. It renders aa-tools useless

I have tried to create a profile using sudo aa-grenprof and it has suddenly stopped working. It did not even show error message and I cannot find usefull information in the logs(syslog and auth.log). ...
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1answer
39 views

How to disable GUI and only use terminal?

My laptop is running very slow so I thought about disabling the GUI and some preferred me to use this command to disable GUI sudo service gdm stop But using this command i am not abled to type ...
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Ubuntu 20.04 (Gnome3 / LighDM) > lock screen on suspend

Hello :) It might be a [duplicate] but none of the answers I found work for me. brieucdug@sildenafil:~$ uname -a ; gnome-shell --version ; lightdm --version Linux sildenafil 5.4.0-31-generic #35-...
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Display manager not working

I recently restarted my computer and the Display Manager stopped working. I got the login screen and as soon as I tried to log in the screen went black. I went to reinstall gdm3 but that failed to ...
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Issues with Lightdm and gdm3 on ubuntu 20.04

I have been using ubuntu 20.04 since release, I started with gdm3 and then I got the infamous login loop error which I couldn't solve without switching to Lightdm. The issue is when I switch to ...
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Ubuntu 20.04 secondary display not getting past splash screen

I am on gnome, with the lightdm display manager, with an Nvidia graphics card, the latest 440 drivers from the PPA is installed, and the HDMI output is detected via xrandr as shown below: Screen 0: ...
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I compiled herbstluftwm via its git repo but I can't see it in lightdm?

Everything went successful. git clone https://github.com/herbstluftwm/herbstluftwm cd herbstluftwm mkdir -p build; cd build cmake .. make sudo make install
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I changed my display manger to lightdm but appearence didnt change.(ubuntu 18.04)

I followed https://linuxconfig.org/how-to-install-cinnamon-desktop-on-ubuntu-18-04-bionic-beaver-linux and changed my display manger but no change in appearence
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Login loop GUI three desktop environments

I just reinstalled Ubuntu 18.04 and initially had problems with no GUI. After some help, I got Gnome and lightDM but now I am stuck in a login loop. A while earlier I was able to login, but there ...
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How to eliminate lightdm/gdm and use startx to fire up MATE on Ubuntu Server 20.04 post shell login?

On Ubuntu Server 20.04 I've found that I'm having some trouble getting plain old startx to work for users after installing MATE desktop. GDM can start up fine as well as LightDM, but when I kill them ...
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lightdm changed default desktop enviourment and removed applications from menu

My PC(ubuntu 20.04) was working fine but today when I try to login I got into login loop and after some time I figured out that this is an issue with gdm3 then I installed lightdm and set it as ...
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Ubuntu 20.04 XDG_SEAT, XDG_VTNR, XDG_SESSION_ID env variables are not set

I set up and installed Ubuntu 20.04 using debootstrap method debootstrap --arch=amd64 --variant=buildd focal ./focal_amd64 http://archive.ubuntu.com/ubuntu/ then installed all the rest. It runs ...
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Reinstall a display manager [duplicate]

I've just been installing DDE on ubuntu and I accidentally chose lightdm over gdm3. What do I do?
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Is it possible that LightDM is broken?

I run Xubuntu 18.04, and I used to run LightDM as my desktop manager. Recently, though, it has stopped working. I log in, and it just refuses to load. I suspect this is because it never starts in the ...
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265 views

How to select lightdm greeter theme or appearance?

I'm testing Ubuntu 20.04 LTS with many desktop environments installed. Currently I have the following: $ dpkg -l | grep -i greet ii arctica-greeter 0.99....
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How to start Pantheon from GDM3

I have a laptop with Ubuntu 19.10 installed that I've been using for a while now. However I would love to use the Pantheon desktop which is found on elementary os. I installed all the necessary ...
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1answer
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Shortcuts inactive after login

I am on Ubuntu 18.04 with Unity (dual screen and nvidia-driver-435), and shortcuts configured in my settings (Settings > Devices > Keyboard > Launchers) as: F5 for "Launch terminal" F6 for "...
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Unable to logout from guest session on Xubuntu 20.04

I have Xubuntu 20.04 installed on a couple of my AMD64 machines, and in each case I've edited: /usr/share/lightdm/lightdm.conf.d/50-disable-guest.conf do that it now contains: [Seat:*] allow-guest=...
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Resume from suspend not working on a Macbook 5.3 (2009) and fresh installed 20.04

Neither lightdm, nor gdm3, not in any combination (nouveau/nvidia-340) is providing a working suspend on my Macbook pro (5,3) from 2009. The best that I can get is NVidia with gdm, where at least I ...
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5answers
9k views

Ubuntu 20.04 - Can’t log in after upgrade

I installed 20.04 (upgraded from 18.04) and cannot log in at all. I’ve tried changing my password using recovery mode, installing lightdm, and using Ctrl-Alt-F3. Strangely, when using Ctrl-Alt-F3, I ...
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1answer
101 views

X Display not usabled after installation on PC

I am setting up a PC with ubuntu. I have a problem with the graphical UI. The logon screen is displayed correctly. After logon another screen is displayed. But after half a second everything is ...
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1answer
169 views

Display won't turn off with inactivity

I am using Ubuntu Studio 18.04.4 TLS on a desktop tower and the display won't turn off when system is inactive. In fact, if I trigger the "screen off event" with sh -c "sleep 1 && xset dpms ...
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46 views

Failed to start GNOME display manager

I switched from gdm3 to lightdm but now I can’t boot Ubuntu-18.04.3. I get the message: Failed to start GNOME Display Manager in recovery mode Went into tty2, tried: sudo dpkg-reconfigure lightdm ...
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18 views

Unexpected switch to console mode when switching workspace

Around once an hour and completely randomly, when switching workspace by using Ctrl+Alt+Up or Ctrl+Alt+Down, my OS switches to console mode (full black screen + shell input that asks for my login and ...
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1answer
72 views

Black screen login loop when using GDM3

Problem Hello everyone! I am having a problem with my Ubuntu computer using GDM3. My machine gets to the GDM3 login screen just fine, but whenever I type in my password and hit the button to log in ...
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62 views

Is LightDM necessary after installing GDM3

Do I need to keep LightDM after installing GDM3. If not then will it effect any other programmes on removing. Please do not hesitate to ask any info or data needed regarding this problem. N.B.: I ...
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1answer
41 views

Light display manager not functioning after updates

I am sorry if this isn't in the right format or if this question was answered before. I have a Dell Latitude 7490 running Ubuntu 18.04 64bits. I was trying to install winehq to play league of legend ...
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problems after upgrading ubuntu to 20.04 [closed]

So the other day I decided to upgrade Ubuntu to its latest version. I rebooted the computer after the installation and that's when the problems started. At first it was the blank screen bug. It ...
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1answer
146 views

Trouble installing BleachBit

I have ubuntu 18.04 LTS and I'm wanting to get BleachBit and when I try through the command line, I get this error message: Preconfiguring packages ... (Reading database ... 168709 files and ...
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69 views

Ubuntu 19.10 LightDM - Purple Screen flashes after Login before desktop is shown

I'm using Ubuntu 19.10 with the LightDM login screen. It works fairly well, but after I login and before it shows the desktop, a purple screen flashes for a second. I've looked at this post, but it'...
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101 views

PCIe Bus Error and lightdm module uninstalled

Need a little help. I've Ubuntu 18.04 installed which had python 2.7 initially. Instead of updating I installed 3.6 separately without taking proper precautions and it wreaked havoc on my system. So i ...
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login loop - how to fix gdm3

I did something and messed up gdm3 because I have a login loop. I think it was related to installing vulcan drivers, which I removed since then. I checked permissions on .xauthority and /tmp - both ...
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Is there a way to install Unity 7 without the extra packages?

When I install a "Minimal" Ubuntu 19.10 installation, it excludes much of the packages that come with Unity 7. Some of them are: The productivity suite, photo/video editor, games, et cetera. What I ...

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