Questions tagged [lightdm]

LightDM is a lightweight X11 display manager. It can use different greeters in the style of different desktop environments.

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Prevent lightdm from turning off screen when locking session

I am running Xubuntu 18.04. When I lock the session, the screen gets turned off instantly. I am using stock lightdm as display manager and lightlocker for locking the session. From my viewpoint the ...
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Lightdm multiseat problem on debian

I have a problem with multiseat and lightdm, problem is somehow with systemd and dbus, but if I have all setup correctly and setup dbus with allow setting for everything, I always get permission ...
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systemd-logind: `Image lacks .osrel section, refusing` in journalctl

Here's the output of journalctl -b -u systemd-logind.service -- Logs begin at Wed 2019-05-15 12:38:02 CEST, end at Sat 2019-06-08 18:04:57 CEST. -- Jun 08 17:04:33 ArchLinux systemd[1]: Starting ...
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Keyboard layout on LightDm

I'm trying to configure the keyboard layout to azerty (french keyboard) in lightdm. My tty and my desktop are already in azerty. I have a /etc/X11/xorg.conf.d/20-keyboard.conf with : Section "...
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Unable to wake up after locking screen

Just installed Xubuntu 19.04. When I try to lock my screen it does some weird and crashes. Screen turns off and I have to turn the system off manually. Tried xscreensaver and it works just fine, but I ...
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Arch - Gnome won't boot after disabling lightdm and enabling gdm

I was trying to find a way to lock my screen in Gnome, so I followed this forum, but when I rebooted Arch, I am stuck with a black screen and a cursor that doesn't move as shown here.
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lightdm and ldap authentication: how to display connectivity issues

I use LightDM als my display manager, entering user credentials via its greeter login. The system's PAM authenticates against a LDAP server. Unfortunately, the network is unreliable hence the LDAP ...
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Logged out when switching tty

I ugraded my Debian from Stretch to Buster. Now each time I switch the tty (by Ctrl-Alt-FX) from my graphical instance (F7) to something else (e.g. F1) and back, I have to login again. It seems that ...
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Debian 9 MATE start lightdm on system boot after disabling

Some many months ago I disabled the automatic start of lightdm. I can start from the commandline without issue but I want now to set it as the default again. What configuration file did I change?
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220 views

Change lightdm keyboard layout US to Portuguese Arch Linux

I'm installing Arch Linux, but I have a problem with the installation of my display manager, lightdm. When I install and enable lightdm, I think the keyboard layout changes from Portuguese to US. ...
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Centos 7: Fails login with fluxbox and lightdm

On my Centos7 vm I have installed fluxbox and lightdm. But when I set the password correctly it still fails to login. Originally I had a the following .xinitrc: exec /usr/bin/startfluxbox But with ...
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Problem with mouse area not reaching lower section

Under Debian 9.3 and 9.8 with OPENBOX and LIGHTDM. I have a problem with the mouse pointer on screen. Depending on the orientation, there is a section on screen that the mouse pointer doesn’t go. BUT, ...
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334 views

Deepin White screen

I installed deepin on Arch (fresh install) and it just isn't working, I can't log in, when I start the lightdm.service, it just shows blank white screen. I haven't enable the service yet. I was just ...
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Error in io.elementary.greeter

I am using archlinux. When using io.elementary.greeter with lightdm the screen remained black. You can start the virtual terminal, but it will be returned to the black screen immediately. As I saw ...
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Linux kernal 4.19.0-kali1-amd64 Black screen error on sleep [duplicate]

I am facing this error after I have upgraded my Kali Linux to the latest version that is (4.19.0-kali1-amd64). uname -a 4.19.0-kali1-amd64 #1 SMP Debian 4.19.13-1kali1 (2019-01-03) x86_64 GNU/Linux ...
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How can I stop LightDM from crashing when unlocking if a DisplayPort monitor is disconnected?

I've an Intel NUC6i3SYH running Debian GNU/Linux with LightDM 1.26.0-3, LightDM GTK+ Greeter 2.0.6-1 and Light Locker 1.8.0-3. When I lock my session, disconnect the DisplayPort cable from my monitor ...
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103 views

How do I use ssh-agent as a wrapper program?

I'm trying to start awesome windows manager as a subprocess of ssh-agent. It worked when I used startx (ssh-agent startx). But now I'm trying to make it work under lightdm. lightdm starts /usr/bin/...
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Lightdm login messages

I'm using lightdm as display manager in Raspbian GNU/Linux 9 (stretch), and I'm missing the login info messages, like "incorrect password, try again". More precisely: upon boot or logout, if I ...
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Dual Boot Win10/Linux Mint hangs on boot, Light Display fails to load

Recently I had issues with my dual boot Linux Mint/Windows 10 instillation. It wouldn't boot. My computer would turn on and it said Error: Unknown Filesystem. Then put me at a Grub Recovery prompt. ...
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Lightdm fails to start xsession

I switched from xfce4 to i3 a while ago. The first go through, everything worked fine. I then had to reinstall i3 for some reason, and I can no longer enter i3 through lightdm-gtk-greeter. I have to ...
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39 views

lightdm config damaged

I accidentally erased the plymouth package which removed many more packages. The system would still boot but the console hung. I added the packages lightdm and lightdm-gtk-greeter, and now I do get a ...
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1answer
328 views

How to change cursor size in LightDM+GTK

I am using the GTK greeter for LightDM but the cursor looks very tiny on my laptop's 1080 display. I have already set the DPI setting and some text looks big, but the center input is still small and ...
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223 views

What does `lightdm --session-child 12 19` mean?

What does lightdm --session-child 12 19 mean in the following output? Why does lightdm fork a process to execute the above command? I don't find --session-child in lightdm manpage. Thanks. $ pstree ...
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Pam.d three files lightdm, lightdm-greater, lightdm-auth

What are the differences in the three files located in /etc/pam.d /etc/pam.d/lightdm-greeter /etc/pam.d/lightdm-auth /etc/pam.d/lightdm I assume they each serve a different role, what do they do?
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337 views

X11 ignores preferred mode

Problem I'm transitioning the configuration of my multihead monitors from using some rather ugly scripts to /etc/X11/xorg.conf.d/10-monitor.conf. My layout has two monitors of 1920x1200, one rotated ...
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250 views

lightdm does not show users which have no shadow password

I have switched my virtual machine, to use a ldap server for authentication with sssd. I assumed with this setup I will not need to use local passwords anymore, as i can login with ldap authentication....
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My Debian install gives me black screen on start up - it's a quick fix but it happens every time

My issue is a bit strange. I am running Debian GNU/Linux Testing Buster, and I'm very happy with it. However, it has one minor but persistent issue that I can't seem to figure out. Each and every time ...
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1answer
864 views

XFCE/LightDM: Tearing-Fix vs. No Desktop After Logging in

I have Manjaro/XFCE/LightDM and a GeForce GT 710 and I followed this guide to get rid of tearing. I added those three lines to my X-configuration. After I log in in the greeter the screen only shows ...
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1k views

Stuck in a login-loop in lightdm and gdm, but not with xfce and other systems

The interesting part is I found that I was able to login with xfce but not with either lightdm or gdm. (I am using Ubuntu 16.04)
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Do changes in live usb persist linux once installed?

Once installed I am unable to access wifi nor get graphics to work without nomodeset However booting from live-usb everything works perfectly. So I have enabled the nvidia-drivers during live cd in ...
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464 views

LightDM GTK+ greeter doesn't use the right cursor theme

I'm trying to define Suru++ as the cursor theme for LightDM GTK+ greeter on Debian stretch. This is supposedly done by adding Suru++ to the list of alternatives for x-cursor-theme, and choosing it as ...
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133 views

Change gdm to lightdm

I am following the instruction here to create a fake screen. However, I have gdm installed on my CentOS Linux server. Do you think I can still go with the instructions? Should I install lightdm? Will ...
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301 views

Lightdm fails to start after system update

I use Debian 9 with Xfce, amd64. After updating from 4.9.0-6 to 4.9.0-7 the lightdm service fails to start. lightdm.log complains about: Loading users from org.freedesktop.Accounts User /org/...
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81 views

Can't log out of X!

I have a fresh install of Ubuntu 16.04 and have come across an odd problem (two, really, but I don't think they're related). I'm using lightdm. After logging in, X starts as normal, but when I try ...
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lightdm and xfce - password prompt invisible after locking

just updated from LinuxMint 18.3 to 19.0, found a weird problem in locking and unlocking screen. Closing the laptop lid puts the computer to suspend, but when opening it, the password prompt for ...
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243 views

How can I get monitor resolution without lightdm service?

In a desktop application, I need to detect monitor resolution from time to time. The code is like: Display *d; Screen *s; d = XOpenDisplay(":0"); if (NULL == d) { g_print("XOpenDisplay failed\n");...
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491 views

How to stop Gnome Keyring from asking for Login password, like it used to?

Previously, Gnome Keyring only asked for the Default Keyring password when I attempted to launch Chrome. I tried playing around with settings in Seahorse to see if there was a work around for this, ...
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4k views

How to execute command before user login on linux

That's a question I've seen several time for several Linux flavours, so let's try to be exhaustive. What is the method to execute script/command/program before and after user login into its desktop ...
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dropbox service fails or succedes depending on time spent at the login screen

I think I've been doing more than a dozen system reboots in the last few minutes to check this strange behavior. It seems that the service of dropbox succedes or fails in running at startup depending ...
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1answer
2k views

Cannot change default display manager on Mint 19 Beta

On Linux Mint 18.3, when I used to install mdm, the command sudo apt install mdm would open a prompt such as: and I would choose the default display manager. Running sudo dpkg-reconfigure mdm would ...
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Ubuntu 16.04 LTS mouse/keyboard doesn't work at login screen and then freeze

There are many questions like this one, but mine seems to be unique. I have a HiDPI display on a System76 laptop, and running uname -a gives Linux Ulfhednar 4.13.0-43-generic #48~16.04.1-Ubuntu SMP ...
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493 views

Parrot OS: “Failed to start Light Display Manager”

i have recently installed Parrot OS on virtualBox, the installation was successful but as the system started booting, it stopped showing "Failed to start Light Display Manager". here is the systemctl ...
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298 views

Lightdm locking session on suspend when it should not

For some reason whenever the computer suspends it locks the session and I have to log back in. I'm trying to configure my own lockscreen so this is undesired. Lightlocker is installed but disabled. ...
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270 views

How to change LightDM's background without using sudo and without specifying an image on /home?

I have a script that I use to change my wallpaper. I'd like it to change the background presented by LightDM when I turn the computer on too, however: 1) Using an image on /home means that LightDM ...
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Debian: transition from plymouth to lightdm without console text at boot time

I am using plymouth for boot splash and lightdm as display manager on a Debian 9 (stretch) box. My aim is to have a smooth graphical transition from plymouth to lightdm with no console text in between....
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When I log in, it hangs until crng init done

When I log in with LightDM on my laptop running Debian Unstable, it recently started to hang for around 2 minutes until journalctl shows the message kernel: random: crng init done. When I press random ...
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Debian stuck in login loop and constantly crashing when trying to start lightdm after upgrade

My problem seems to be quite specific. I couldn't find a case that seemed similar enough so if You guys find one I'd be glad if you could point me to it or give me instructions on what things I could ...
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1answer
171 views

.xsession exec not recognise $HOME or arguments?

The basic scenario is that I'm sharing my dot files across multiple machines and want to have my session definitons synced as well. Since I use different laptops and monitors with significantly ...
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1answer
335 views

How to set random wallpaper image on light-locker?

I'm using light-locker as my lockscreen for my Arch Linux pc. Every time the lockscreen comes up there is this black white background image of a shoe store (seems to be the default). I really dislike ...
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1answer
256 views

Password for user is not asked anymore [closed]

I am using Debian Stretch with lightdm. Suddenly, I am no longer asked for a password when I log in. As soon as I fill in my username and press tab, the password field is removed and I can log in ...