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Questions tagged [gdm]

GNOME Display Manager (GDM) is a program which provides Ubuntu GNOME's graphical login screen.

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How do you change Ubuntu 21.04 lock screen image?

After searching, I couldn't figure out how to effectively change the lock screen image. From the search results I have found, I think that I have to extract the .gresource from /usr/share/gnome-shell/...
R1D3R175's user avatar
-1 votes
1 answer
2k views

Not able to change the login screen background ubuntu 20.04

I am not able to change the background at my login screen. tried the gnome extension way. Not working even after i already change it there, the background is still the default one. Used ubuntu tweak ...
Yusof Khan's user avatar
2 votes
1 answer
303 views

How to disable Livepatch window on boot?

I am working on a AWS instance running Ubuntu 20.04 LTS. My display manager is gdm3. When I access the instance via xrdp, I see this window: I'd like to disable this popup via a bash command. How do ...
Foo's user avatar
  • 147
1 vote
1 answer
516 views

20.04 GNOME Desktop would not load after login

Sometimes my desktop would be stuck loading after I log in. I'd get an entirely purple screen with a functional mouse pointer but nothing else. Usually the rest of the desktop would load in normally ...
Tyler Tian's user avatar
1 vote
0 answers
165 views

Ubuntu 20.04 broken gdm on wake up from suspend mode

I'm using a desktop with Ubuntu 20.04 and a Nvidia RTX 2070 with driver "nvidia-driver-470". Sometimes when SO goes to suspend mode, on wake up GDM come back broken like this image. So I ...
Kauan Mocelin's user avatar
3 votes
1 answer
5k views

How to change Ubuntu 21.04 Orange color? It persists even after changing GTK theme

I use gnome 3.38.5 on ubuntu 21.04. My tweaks setting: basically i wanna change all the orange colour on ubuntu. for example the border of this research form or those of the monitor preview on the ...
dev-perri's user avatar
1 vote
0 answers
96 views

How to modify the gdm3 greeter's texts?

I'd like to change, for example, the "Sorry, that didn't work" to something else. Are the texts of the gdm3 greeter available and modifiable somewhere in the system? I am aware that this ...
jolammi's user avatar
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151 views

Authetication fail on GDM

Sorry to Disturb you We started having some issue during the authetication phase in ubuntu 18.04, mainly, but not limited to, trying to login after a locked session- We are using an LPAD ...
JORKS's user avatar
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1 answer
1k views

Touchscreen stops working

I am working with some Ubuntu systems to control some smart home things. I run Ubuntu on a industrial PC with an industrial touchscreen display. Everything was working fine. Since some time ago the ...
Kevin Jedynak's user avatar
1 vote
1 answer
79 views

Login Loop and strange PWD

I'm getting the infinite log in loop on Ubuntu for just one of my user accounts - I've tried all of the recommended solutions (modifying .Xauthority, /temp/ and using lightdm) Strangely when I ctrl+...
deep_bleu's user avatar
0 votes
1 answer
314 views

Gnome Shell running, with no one logged into it?

Ubuntu 18.04, logged out of GUI, accessed system via webmin and see an awful lot of memory being consumed by Gnome. Shouldn't this end when all users are logged out of the GUI? Can I kill all this ...
alabamatoy's user avatar
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181 views

Login screen remains grey after successful login

I'm using Gnome vanilla. Many times, after I login, instead of getting the normal Gnome shell desktop I get a grey screen. It's like the GDM greeter but without any controls whatsoever. When this ...
To Do's user avatar
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Got an unexpected dock

I installed lightdm on my ubuntu 20.04 , and then I switched back to gdm3. user login page is changed But the desktop environment is not changed yet , and I am facing many problems in it. I am totally ...
Manav Joshi's user avatar
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0 answers
883 views

Can not access tty terminal

My HP Probook has problems with Display manager. Basically, for now I can not access even login page (While I am on login page, I can access tty isn't it ? But it is unreachable for now). I do not ...
shzetb's user avatar
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2 votes
0 answers
452 views

GDM 3 - How to deactivate session choice?

When I enter my password in GDM 3, I can choose the session I want (Gnome, KDE, and whatever is installed). I have set a default session and I would like my users not to be able to use another one ...
Thomas B's user avatar
0 votes
1 answer
444 views

Device won't go to login screen after removing gdm3

My Lenovo Legion laptop has Ubuntu 20.04 on it. My initial problem was that, when I boot up the laptop after it goes to sleep, the screen will remain black and I have to reboot to log in again. I saw ...
Ahmad Hussian's user avatar
2 votes
0 answers
269 views

Freeze after waking up from suspend and entering password prompt, after updating to 21.04

I recently updated to 21.04, suspend and wake up worked fine before. After the update I noticed that after waking up from suspend and pressing enter to open the password prompt, the screen freezes. I ...
enveeed's user avatar
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2 votes
0 answers
2k views

Connect to Ubuntu 20.04 via VNC before login (with GDM3)

Good day, I need to be able to connect via vnc to an Ubuntu 20.04 client, log out via it and log back in. My problem: VNC can not connect when I am in the login screen. I know this is a general ...
D1Ck3n's user avatar
  • 21
1 vote
1 answer
513 views

lockscreen not available Ubuntu 20.04.2

My look screen is not working or even "not presented". After reboot I can unlock the device but after that I cant lock it anymore Super + L not working gnome-screensaver-command -l not ...
Wulf's user avatar
  • 123
1 vote
0 answers
173 views

Plymouth glitch when I power off PC

So, I use 21.04 and when I power off PC then I can see that keyboard is off, but Plymouth is frozen, then in about 15 seconds PC gets off as well. I looked at logs and find 2 errors, is there any way ...
Igor Foxly's user avatar
2 votes
0 answers
4k views

gdm3 doesn't start during boot ("session never registered")

I have Linux syg-5 5.4.0-73-generic #82-Ubuntu SMP Wed Apr 14 17:39:42 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux with Ubuntu 20.04 and Gnome. When I logged out today, my machine crashed for some reason,...
grssnbchr's user avatar
  • 165
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1 answer
160 views

Ubuntu server 18 problem with display manager - can't see GDM properly

Lenovo sr650 server with 2 graphical adapters : Matrox Electronics Systems Ltd. MGA G200e NVIDIA Corporation GV100GL [Tesla V100 PCIe 32GB] After installing GDM - can't see it properly . Please ...
Jeka Feigelman's user avatar
1 vote
0 answers
428 views

How do I enable mirror (clone) display mode on login screen? (gdm3)

My monitor is often turned off when I log in (I use the TV instead). I usually use screen mirroring (cloning) when logged in. But on the login screen, the mirroring doesn't work. Thus in my TV, I don'...
whyer's user avatar
  • 519
2 votes
0 answers
685 views

GDM3 Crashes system when external monitor connected with Wayland

I installed Ubuntu 21.04 today and would like to use it with my external monitor. However, I have discovered that connecting the monitor before startup made the system hang at the purple login screen. ...
Kemal Hasan's user avatar
0 votes
1 answer
2k views

Set the login screen to a different fixed refresh rate?

I am using Ubuntu 21.04 with a 144 Hz monitor. I wonder if there is a way to set the login screen to 144 Hz? This would probably avoid to switching the refresh rate at session startup (screen going ...
char8_t's user avatar
  • 103
1 vote
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469 views

boot stuck at /dev/sda clean XXX/XXX files, XXX/XXX blocks [20.04]

Been running 20.04 nicely for ~6 months. Laptop was sluggish today so did a reboot and now stuck at the titular screen. /dev/sda7: clean, nnnnn/nnnnn files, nnnn/nnnnnblocks Similar questions here ...
Robert Hickman's user avatar
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214 views

What versions of GDM are used in Ubuntu 20.04 and 20.10?

What versions of GDM are used in Ubuntu 20.04 and 20.10? I found the version history of GDM: https://help.gnome.org/admin/gdm/ I need this to submit a bug on GDM's bugtracker
Artem's user avatar
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92 views

Troubleshooting Ubuntu 20.10 freezing except for the mouse

I know there are a lot of questions online asking about this topic but most of them look for quick fixes and while they do usually work I am looking for a deeper fix that would prevent this problem ...
Fateh A.'s user avatar
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Customizing theme - where is the purple background set?

I've customized my GDM theme and Gnome Shell theme in Ubuntu 20.04 (using Yaru as the base). To do this I have modified both /usr/share/gnome-shell/gnome-shell-theme.gresource and the files in /usr/...
Enterprise's user avatar
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637 views

How to customise GDM?

I found this article, but there is no such setting in Ubuntu 20.04 am I right?
szutsmester's user avatar
4 votes
2 answers
2k views

How to disable fingerprint in GDM?

I use fingerprint with success and it is integrated well, however for decryption it is not helpful during initial login. So I want to disable for GDM login. However I can not find a clear description ...
Thomas's user avatar
  • 370
1 vote
1 answer
2k views

Fast bootup, but slow login from GDM prompt to desktop

Specs Ubuntu version: 20.10 (groovy) Storage: SATA SSD RAM: 8 GB DDR3 CPU: AMD A8-4500M APU GPU: AMD Radeon HD 7640G Problem Bootup is quite fast at 14 seconds as reported by systemd-analyze. But ...
Pavin Joseph's user avatar
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1 answer
3k views

Black screen with blinking cursor when booting!

I installed ubuntu 20.04.2 LTS. After installing, I restarted and everything was working fine. Today when I tried to boot up ubuntu again, I was met with a black screen and a blinking cursor. running ...
JustHere DoingNothing's user avatar
1 vote
0 answers
201 views

How to disable the "screen locking disabled" notification in gnome 3.38?

This message pops up after every login, this started happening when I removed the desktop icons gnome extension - DING https://extensions.gnome.org/extension/2087/desktop-icons-ng-ding/ (I'm using ...
Ari157's user avatar
  • 111
1 vote
0 answers
132 views

Ubuntu 20.04 LTS - Why am I only in one group?

I am experiencing the same problem as noted at: Why my linux account only belongs to one group? I am running 20.04 and GDM. I've also: Followed every suggestion I could find related to disabling ...
Norm's user avatar
  • 11
0 votes
0 answers
178 views

Computer does not complete boot cycle

Version is Linux dad 5.8.0-44-generic #50~20.04.1-Ubuntu SMP Wed Feb 10 21:07:30 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux I've got a newer system76 which will complete grub and the initial boot menus, ...
Charles Green's user avatar
0 votes
0 answers
155 views

Login Screen: Disable the password visibility toggling button

I have a default 20.04 Ubuntu install and the login screen has a password-visibility toggling button (an eye). I wish to disable this button and make the password always invisible. How can I do this? ...
Pedro Rolo's user avatar
  • 1,336
1 vote
0 answers
246 views

Machine starts to blank screen with blinking underscore every time, even after restarting gdm3

I have a Dell Precision 7540 with Ubuntu 20.04. I came into a problem where my machine would boot and get to a screen with a blinking underscore. This occurred after I closed my laptop, it had a blank ...
ztkpat001's user avatar
1 vote
0 answers
751 views

Display Managers gdm3, xdm not working after upgrade to 20.04; lightdm stuck in login loop, only LXDE working [duplicate]

I just upgraded to Ubuntu 20.04. But I'm now stuck with problems with display managers. GDM3 (preferred DM for me) and xdm are just stuck at a black screen (with a blinking cursor/underscore). Next ...
Averis007's user avatar
1 vote
0 answers
349 views

UBUNTU: clean, 958917/30883840 files, 22643659/123523840 blocks [duplicate]

I have an issue with Ubuntu 18.04. I was preparing a presentation and I had to force the shut down since the screen was blocked. When I rebooted this was the message (on black screen), no more. I have ...
DDS's user avatar
  • 11
1 vote
1 answer
642 views

Trying to install GNOME on Ubuntu on remote server

Im a fairy new user at Linux. I have Ubuntu 18.04 on a host at paperspace. I'm following this guide: https://www.teknotut.com/en/install-vnc-server-with-gnome-display-on-ubuntu-18-04/ Beside that I ...
Powermongur's user avatar
1 vote
0 answers
624 views

ubuntu 20.04 missing /usr/sbin/gdm3 and /lib/systemd/system/gdm.service

This is a followup to my earlier posting on this site. I have two different Dell machines running 20.04. Both worked fine, and then, for no apparent reason, when I rebooted, I could not get to ...
Leo Simon's user avatar
  • 1,539
4 votes
0 answers
2k views

System-wide x11vnc for GDM on 20.04

I'm trying to setup system-wide x11vnc so even if no users are logged in, I can remotely connect and start a Gnome session. I followed this tutorial on the Arch Linux wiki as it seemed to mirror ...
Mattias B.'s user avatar
0 votes
1 answer
3k views

Black Screen after login (Ubuntu 20.04)

Problem: After typing in my credentials I am greeted by a black screen with a cursor. My desktop environment does not load. How can I resolve this issue and get my desktop environment to load? System: ...
PavelNikov's user avatar
2 votes
0 answers
2k views

Run two gnome sessions simultaneously on a single desktop, isolating one from another

This is to expand on Is it possible to have different desktop sessions each with different settings? First off I know how to run two desktops by running something like xinit /usr/bin/xfce4-session -- :...
galets's user avatar
  • 634
1 vote
0 answers
106 views

Screen lock disables color correction profile

I calibrated my monitor using a colorimeter and the color tab in Gnome settings. The color on the screen looks good until the screen turns off (automatically after some time). When the screen starts ...
Benjamin's user avatar
2 votes
1 answer
2k views

Failed to start Light Display Manager on boot for Ubuntu 20

tl;dr; Light Service DM is not starting. I have tried fixing it via GDM3, was unable to do so due to broken packages. I think that somehow NVIDIA is involved, but I am not sure. Where to start from ...
zwep's user avatar
  • 165
0 votes
0 answers
33 views

how to report problem on ubuntu Wiki page? why there is lightdm and not gdm?

I wanted to ask why is there (here https://help.ubuntu.com/community/SoundTroubleshootingProcedure) in Step 1 lightdm package installed? I believe Ubuntu does not use lightdm but gdm, right? I cannot ...
crysman's user avatar
  • 508
1 vote
0 answers
124 views

GNOME desktop manager no longer opening, drop to console login screen

I'm running ubuntu 18.04 on a Dell 5540. Everything was working fine until I rebooted a couple of days ago and was dumped into a console login screen. Looking at the current syslog I find ...
Leo Simon's user avatar
  • 1,539
0 votes
0 answers
102 views

If password fails, make GDM switch bach to the User list in 5 seconds

If the user enters an incorrect password on GDM in Ubuntu 20.04, the password box is redisplayed along with the error message, "Sorry that didn't work. Please try again." If you do not ...
Enterprise's user avatar
  • 12.5k

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