Failed to start Light Display Manager

[thesnowphox]

Happy late Easter everybody

I’m facing a slight issue. Whenever I try to boot from the linux-lts kernel my system doesn’t start the x-server. I always get the following message: [FAILED] Failed to start Light Display Manager

Surprisingly everything works well on the normal kernel…

Here’s my x-org log: https://dpaste.com/BS9U9G8GB

Any help would be appreciated…

Thanks

[thesnowphox]

Update: Just booted my system with the lts-kernel out of curiosity… and it worked this time…
It’s seems like it’s a mixed bag… sometimes it works and then other times it throws the above mentioned error…

Hope that future updates will fix this issue

[jonathon]

Some additional pointers:

@thesnowphox

[FAILED] Failed to start Light Display Manager

journalctl -u lightdm may show more/other information.

[   390.174] (WW) Warning, couldn't open module intel
[   390.174] (EE) Failed to load module "intel" (module does not exist, 0)

Perhaps try removing xf86-video-intel if it is installed.

[FAQ] Computer doesn’t boot, boots to a black screen, or stops at a message

While there are many potential reasons why your installation doesn’t boot to a desktop, the primary reason is that the graphics drivers haven’t loaded correctly so your login/display manager (DM) doesn’t start. This is why you get a “black screen” or stuck at an [ OK ] Started some service message. The normal reason for this is that you have the incorrect driver version for the kernel. This can happens when the mirror you are updating from is not fully synchronised, or times out, and so y…

[thesnowphox]

Thanks for replying!

I don’t have the xf86-video-intel installed as it caused problems in the past.
As for the journalctl log - here you go: https://dpaste.com/87JKH7LZN

Could this weird behavior be tied to the recent mesa update? Saw a lot of posts where people encountered the same problem

Thanks again!

[ricklinux]

Do you have logind-check-graphical=true inside of lightdm.conf? This might help from it happening.

[jonathon]

@thesnowphox

As for the journalctl log

Hm. Not much in there except that it fails to start. Check the logs under /var/log/lightdm/ .

[thesnowphox]

Hmm… I never changed anything in that config file except the session greeter. Mine is set to lightdm-mini-greeter.

[thesnowphox]

Looks fine to me… There aren’t any errors in that file…

Anyways, thank you for your help : )

[jonathon]

@thesnowphox

There aren’t any errors

OK, time for the Arch wiki:

https://wiki.archlinux.org/index.php/LightDM#Troubleshooting

[thesnowphox]

Thank you. I will take a look at it tomorrow

[thesnowphox]

Hi again,

I tried your solution yesterday and it seems that this setting fixed my issue.

Thanks for your time and help

[thesnowphox]

Sorry to reopen this…

After some time my initial solution stopped working. I just can’t wrap my head around why this is still happening.

I looked into the X.org log file and the only thing that makes sense to me is the last couple of lines…

(EE) no screens found (EE)

Do I have to specify my screen in the lightdm config?

Thanks everybody for your help

[jonathon]

Assuming this still holds:

@thesnowphox

Whenever I try to boot from the linux-lts kernel my system doesn’t start the x-server

@thesnowphox

everything works well on the normal kernel

Then why are you not just using the normal kernel?

[manuel]

If the problem persists, might be worth trying another display manager, e.g. sddm as a workaround.

[supermarille]

Hello.
I happen to have the exact same issues.

1. booting never reaches login
2. I opened tty2 and logged in there
3. systemctl list-units --failed gives

lightdm.service loaded failed failed Light Display Manager

3. systemctl status lightdm gives
   
   

(I’m sorry for the pictures, as the issue is that I can’t run a graphical interface on the machine)

4. After lots of researching on the internet, I check out /var/log/Xorg.0.log :
   

   

5. I give a look at xorg conf file cat /etc/X11/xorg.cong which gives the following

Section "ServerLayout"
EndSection%

Is that supposed to be this empty ?

6. lightdm --show-config:
   

   

7. As suggested by manuel before, I installed sddm, but it’s also not working
   

   

Did anyone managed to resolve such an issue ? Ultimate solution would be to make a fresh install but I really don’t feel like it, and it would not be an answer to understanding what’s happening.

[marteng69]

Welcome to the forum, @supermarille!
Please do not necrobump such old threads. Just open a new one in the future instead.

5. I give a look at xorg conf file cat /etc/X11/xorg.cong which gives the following

Section "ServerLayout"
EndSection%

Is there really a % behind EndSection?
If yes, delete it. The output in /var/log/Xorg.0.log says that there is a error in that line of the conf-file

Is that supposed to be this empty ?

I do not even have that file on my systems and they all run fine.

[ricklinux]

@marteng69

cat /etc/X11/xorg.cong

Typo?

Should be cat /etc/X11/xorg.conf

Edit: I don’t have this file either with amd graphics.

[supermarille]

Thank you for your answer ! I’m sorry for using this old topic, as it is not resolved I was afraid of creating a duplicate. Should I stop replying here and start a new one now ?

I tried removing the %, but it didn’t change anything.
So I tried to make it an empty file, out of curiosity, then I ran startx. This ended up with a primitive layout, not really what was expected, see below

Removing the file gives the same result.

According to lspci I have an Intel Corporation HD Graphics 620.

[ricklinux]

Is your system up to date?

[supermarille]

yes it is up to date, updating was the first thing I tried. uname -a gives
Linux biumachine 6.3.2-arch1-1 #1 SMP PREEMPT_DYNAMIC Thu, 11 May 2023 16:40:42 +0000 x86_64 GNU/Linux