Skip to main content
Share Your Experience: Take the 2024 Developer Survey

Questions tagged [sddm]

QML based X11 and Wayland display manager

Filter by
Sorted by
Tagged with
1 vote
0 answers
257 views

Ubuntu Studio 23.04 - Autologin doesn't work

Using the default login manager / greeter (sddm) which seems to support both X11 and Wayland. However i have to type my password at each startup, despite trying every way i can think of to get my ...
dolt's user avatar
  • 335
0 votes
0 answers
462 views

NVMe very slow speeds INTEL SSDPEKNW512G8L

need some help to identify why this disk is running so slow: sudo hdparm -tT /dev/sda /dev/sda: Timing cached reads: 1962 MB in 2.00 seconds = 982.96 MB/sec Timing buffered disk reads: 90 MB in ...
Jacek K's user avatar
  • 11
0 votes
0 answers
250 views

SDDM Numlock Non Functional

Having an issue in kubuntu 23.04 where even if i check the 'nublock on' box for boot, it does not apply the setting. Also, to get numlock to turn on, it must be pressed two times. I have confirmed ...
Tweak's user avatar
  • 11
0 votes
1 answer
350 views

on startup login screen has default wallpaper

I am on kubuntu 22.04 and when I start up my device, login screen shows the default login background not the one I set in settings. waking from sleep or locking screen shows correct login screen ...
Usermaxn's user avatar
  • 207
0 votes
1 answer
913 views

KDE Plasma, virtual keyboard on login

I see complaints online going back as far as 2009 about a large virtual keyboard that appears and covers the login prompt upon system boot. Boot. Login screen quickly disappears and is replaced by a ...
jamshark70's user avatar
0 votes
1 answer
34 views

I have trashed my system so only see a xfce dexktop session instead of kde [duplicate]

I managed to trash my Kubuntu system, by some silly apt removal and attempt to correct the mistake, so now at login all I get is a xfce session, which hangs after I enter my password. I can switch out ...
nobody special's user avatar
1 vote
0 answers
39 views

Kubuntu login prompt takes long to appear after waking laptop

I honestly can't verify whether the answer to this exists already, because the issue is very difficult to google. After several hours of searching, I have decided to post here. I have the issue that ...
eralus's user avatar
  • 11
2 votes
1 answer
1k views

How do I get the login SDDM to use large fonts on my hidpi display?

On Kubuntu 22.04, I've configured my desktop session to use a suitably large font with System Settings > Display and Monitor > Display Configuration > Global scale. But the SDDM remains ...
Alan De Smet's user avatar
0 votes
1 answer
1k views

SDDM (seems) Broken

on Kubuntu 2204, all recent patches in-place. KDE Plasma version: 5.24.6 KDE Framework: 5.92.0 Qt version: 5.13.3 Kernel version: 5.15.0-47-generic (64bit) Graphics platform: x11 Relative Humidity: 63%...
C.wunnfirr's user avatar
0 votes
2 answers
2k views

Ubuntu Studio: sddm greeter missing file - how to fix and how to switch sddm-greeter design

I just upgraded from Ubuntu Studio 20.04 to 22.04. When Ubuntu boots up the greeter screen seems very broken. No usernames appear, the background is grey and no text is displayed. Luckily I can still ...
AlexOnLinux's user avatar
1 vote
0 answers
130 views

SDDM freezes when trying to switch user after upgrade from focal to jammy

After kubuntu upgrade from focal to jammy when trying to switch user SDDM displays switch user screen but do not respond to keyboard or mouse, so it is impossible to switch. Before upgrade everything ...
vvch's user avatar
  • 111
0 votes
1 answer
6k views

sddm not starting - Failed to read display number from pipe

I have a problem that is driving me crazy and could not find a solution in the web jet, so I would appreciate if anyone can point me in the right direction. I have a laptop MSI prestige running ...
Tomás's user avatar
  • 1
0 votes
0 answers
2k views

How can I fix screen tearing and flickering issues with KDE Plasma and SDDM after switching from GNOME on Ubuntu 22.04?

I’m using a 2012 MacBook Air with an Intel i7-3667U processor and no dedicated GPU. I just reconfigured SDDM and went to use KDE, but I noticed that SDDM flickered white rapidly whenever at the login ...
ARS's user avatar
  • 21
0 votes
0 answers
94 views

Debian login on power up

How can I avoid this, and immediately boot into Lubuntu?
Olegator36's user avatar
0 votes
1 answer
430 views

sddm-greeter cpu usage, lxqt

I've got an annoying issue that I am trying to troubleshoot and could use some help! I have 10 lxqt VM's managed via proxmox on a rather old machine. The OS needs to be very light and low on resource ...
SVoyager's user avatar
1 vote
0 answers
2k views

X server not starting

Today, when I turned on my PC and logged in, plasma was not starting, so I decided to hit Ctrl+Alt+F2 to change to a terminal. Then I executed startx but it wasn't providing output. Then I tried to ...
Toaffle32's user avatar
0 votes
1 answer
188 views

Boot hangs after sddm removal

I recently installed sddm, but after trying and not liking it decided to uninstall it. However, on a restart, the system hangs before getting to a login screen. I can't access anything in the system ...
BonelessCurv's user avatar
0 votes
1 answer
574 views

I need to add Numlock=on in the [General] section of sddm configuration on Ubuntu Focal, where is sddm.conf?

I need to add Numlock=on in the [General] section of the sddm configuration, but I cannot find it : $ man sddm.conf | grep -1 sddm.conf NAME sddm.conf - sddm display manager configuration -- ...
SebMa's user avatar
  • 2,371
2 votes
0 answers
334 views

Active Directory SSSD - Change Password on GDM login Screen

Looking to see if I can expand the capabilities of the SSSD/AD system with GDM, or SDDM. We want users to be able to change their Active Directory password through our Ubuntu machines, if their ...
Michael Power's user avatar
0 votes
1 answer
138 views

No display when starting an additional X session

So I have this setup at home: +------------------+ +----------------+ | Secondary screen | | Primary screen | | 1280x1024 75Hz | | 1920x1200 60Hz | | (Rotated) | | | +--+---...
Chen Levy's user avatar
  • 121
0 votes
0 answers
282 views

Display manager SDDM doesn't make use of 3rd monitor

I have computer with 2 videocards and 3 monitors attached - 2 to one card and 1 to another one. I run Ubuntu Server with X and I want to use most lightweight display manager as possible. I’m trying to ...
Serg's user avatar
  • 804
3 votes
1 answer
2k views

Login Screen gets stuck after entering password on Kubuntu

On Kubuntu here. When I enter my password on the login screen and press enter, all the buttons slightly fade and the screen just gets stuck with only the mouse cursor really being able to move. ...
EyeScream's user avatar
0 votes
1 answer
365 views

Login Greeter takes 20~30 sec (after bootup apparently finished) to appear

I looked into this question among a few others (on and off SO) for a solution. The upvoted (but not accepted) answer to that question, suggests entropy might be a problem. I have infact from the ...
Duck Dodgers's user avatar
1 vote
1 answer
3k views

unable to kill user-session with loginctl

I'm running lubuntu 20.04 with sddm as display-manager. Whenever I logout over gui and login as a different user the user-session is not be killed (do not know if it is by-design). So loginctl shows ...
nobody's user avatar
  • 5,507
0 votes
1 answer
324 views

KDE with Ubuntu 20.04

I have installed kde on my Ubuntu installation trough sudo apt install kde-full, but I still have some question about updates, is there any issue removing Ubuntu desktop from it using sudo apt remove ...
user1213601's user avatar
0 votes
0 answers
129 views

I'm getting OEM logo after kubuntu logo on boot

I'm able to boot into the command line, but when I try to log into kde desktop I see kubuntu logo and the it goes away and the OEM logo appears and gets stuck. I have no clue what could be the issue I ...
عاطف's user avatar
1 vote
2 answers
534 views

How to highlight password field by default in SDDM (Lubuntu)?

I have installed Lubuntu 21.04. The sddm login page had the password field selected by default but after the update that's not the case. I have to manually select password field before typing it. Is ...
Colorizer's user avatar
0 votes
1 answer
3k views

How to enable trackpad tap to click in SDDM login page?

I'm using Lubuntu 21.04. I would like to enable tap to click in the SDDM login screen. Is there a way to enable it?
Colorizer's user avatar
2 votes
1 answer
2k views

Unable to login !!! "Enter" key not working?

Ok hi there,I have been using Ubuntu Gnome 20.04 and I have insalled the KDE plasma environment on Ubuntu from help of the reference taken from You tube.Now after it had installed and restarts I get ...
RAHUL DHANOLA's user avatar
0 votes
1 answer
3k views

Use Wayland session with Lubuntu 21.04 on Raspberry Pi 4B

I'm on a quest to find the best possible configuration for our Raspberry Pi 4B used almost exclusively to watch internet video streams. So far, I've tried getting the most out of Raspbian/Raspberry Pi ...
Itamar Bitton's user avatar
0 votes
1 answer
1k views

Kubuntu 20.04 keeps perform black screen with NVIDIA

I have been trying Ubuntu 20.04 for two weeks. It worked well with NVIDIA graphic card. Then I tried to install Plasma Desktop. If I choose "gdm3" on installation, everything goes well. ...
deeptionary's user avatar
0 votes
0 answers
188 views

Custom install with ZFS Root for Neon (newer Plasma w/20.04 base), SDDM not starting up

So following these instructions to install Ubuntu 20.04 onto ZFS Root, I got KDE Neon installed (neon-desktop virtual package). Everything seems good, except when I boot up there's no GUI login. I ...
Drizzt321's user avatar
  • 101
0 votes
1 answer
3k views

LUbuntu 20.04 and tmporary user like guest?

How can I enable a restricted user where everything is reset after logout? Note: User is used for web-browsing so security is definitely a topic for me. In case user accesses maicious sites everything ...
ssssstut's user avatar
  • 679
0 votes
0 answers
328 views

Kubuntu 20.04 lost sddm display

I've avoided posting this question for a month while I tried to find out on my own what had gone wrong, but now there is no other recourse. After running Kubuntu 20.04 for about a year on a desktop (...
Jess H. Brewer's user avatar
1 vote
1 answer
191 views

Bash script not running when I boot my laptop

I am new to Linux and I've set it up just how I want it. However, when I am using my laptop at home, login screen appears on both laptop and external screen. I want it to appear just on my external ...
kosingas's user avatar
1 vote
1 answer
2k views

Lubuntu 20_04 GUI does not start, only terminal

Lubuntu 20 04 boots either in a "text mode" and says [ok] for Finished hold until boot process finishes up Started OpenBSD Secure Shell Server Finished Terminate Plymouth Boot Screen Or it ...
Timo's user avatar
  • 237
4 votes
1 answer
5k views

Can not login to SDDM using fingerprint on Kubuntu 20.10

Recently I've bought Lenovo ThinkPad X1 Carbon Gen8. Everything seems fine except one thing - I can't fully configure fingerprint reader. I've followed guide https://askubuntu.com/a/1082465/249099 and ...
Dmitrii Vinokurov's user avatar
1 vote
1 answer
941 views

Remembering Screen Brightness at Display Manager/Startup

With using linux on and off on different PC's through the years, one issue I have not been able to solve is the brightness setting during boot sitting at the Display Manager. I am running KDE version ...
Kayracer's user avatar
7 votes
3 answers
3k views

No more 'switch user' from sddm

I've searched extensively and there are many mentions of this problem but it seems only a few disparate users have had it over the last few months. But the 3 Kubuntu systems I upgraded to 20.10 all ...
dargaud's user avatar
  • 948
0 votes
0 answers
2k views

KDE Plasma login service failed - login loop in SDDM

When I log in to my laptop with Kubuntu 20.10, I enter the password and wait for the desktop window to load but it does not show and it returns me to the initial login window. I ran the test several ...
Diego Aaron's user avatar
0 votes
1 answer
110 views

System will not boot after sudo update and upgrade on 20.04 kubuntu

I am using kubuntu and used ubuntu studio add-on to get low latency kernel. After doing a sudo update and upgrade, the system stopped booting to the login screen. I am able to switch to tty2 and login ...
samperk1's user avatar
3 votes
1 answer
2k views

What is the difference between GNOME desktop and Ubuntu in SDDM?

I installed Kubuntu on my machine, and then decided to try the regular GNOME desktop. Thus I installed ubuntu-gnome-desktop and logged in from the welcome screen running SDDM. This has been a ...
Diego-MX's user avatar
  • 608
17 votes
4 answers
18k views

sddm blocks screen with on-screen keyboard in Ubuntu 20.04

I have recently installed KDE 5 (kde-plasma-desktop) on Ubuntu 20.04, and as part of the installation, it asked me to switch the login screen manager to sddm. When sddm starts (either on boot, or ...
dave559's user avatar
  • 368
1 vote
0 answers
1k views

Sddm login screen blank but active

I'm using KDE plasma with lightdm. I can boot my laptop without any problems. However, I can't change my login screen this way. So, my question is: Why am I getting a black screen at the login if I ...
Stockfish's user avatar
0 votes
1 answer
4k views

How to change SDDM login screen after sleep?

I tried looking at this question but it doesn't address my problem: How to change login screen sddm on KDE Plasma 5 I'm able to install new SDDM login screens (I'm using Kubuntu 20.04) using the ...
Norbert-op's user avatar
1 vote
0 answers
79 views

Java Shutdown hooks on Lubuntu 20.04

I am using the following systemd service to shutdown a Java program gracefully when shutting down a PC running Lubuntu 20.04.1. The script in /usr/local/bin/pre-shutdown searches for all running Java ...
Florian Cramer's user avatar
1 vote
0 answers
856 views

Failed to start lightdm (stuck on bootloop)

Currently I was using kde on ubuntu. But after trying to install cinnamon and lightdm, I can't start my OS. It is stucked on boot logo. And it's showing, "failed to start lightdm". I tried ...
Santo Shakil's user avatar
16 votes
3 answers
10k views

How do I set a picture for my user on the login screen in Lubuntu 20.04?

I would like to display an image of my choice instead of the grey icon above my username on the login screen: No doubt there is a setting for this somewhere, but I have failed to find it so far. How ...
Zanna's user avatar
  • 70.7k
4 votes
0 answers
1k views

KDE login screen of wrong monitor

I have Kubuntu 20.04 LTS version. I have two monitors connected to my PC - primary one via HDMI and secondary via DisplayPort. Both have the same resolution. When I get the KDE login screen (sddm i ...
matej's user avatar
  • 371
1 vote
1 answer
2k views

Every time restart Lubuntu terminal unable to init server, cannot open display

I did something related to ssh or display setting which I don't understand, now every time I restart the Lubuntu, terminal cannot open graphical application: chen@jesuslovesme:~$ gedit Unable to init ...
John Paul Qiang Chen's user avatar