Unable to boot after update and SDDM failed to start

Support
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1

Hello there, I am currently running manjaro KDE and I installed an update prompted by pamac on 1st Jan 2021. After installing the update I was welcomed by a black screen with an error message “Failed to start Simple Desktop Display Manager”. I was not able to login or enter any GUI interface.

Fortunately, I was able to login through tty. Through tty I ran systemctl start sddm and was welcomed by a login screen and after logging in I was able to use my laptop normally. startx through tty seems to work as well.

Now the problem is that I have to manually get into tty and start the sddm service. The service doesn’t start automatically on its own. I ran systemctl status sddm and it says Failed with result 'core-dump'I tried systemctl enable ... but it still didn’t work.

I am currently on 5.10.2-2-MANJARO. I have the following GPU drivers installed:

> 0000:01:00.0 (0300:10de:1f15) Display controller nVidia Corporation:
--------------------------------------------------------------------------------
                  NAME               VERSION          FREEDRIVER           TYPE
--------------------------------------------------------------------------------
video-hybrid-amd-nvidia-prime            2020.11.30               false            PCI
          video-nvidia            2020.11.30               false            PCI
           video-linux            2018.05.04                true            PCI
     video-modesetting            2020.01.13                true            PCI
            video-vesa            2017.03.12                true            PCI


> 0000:06:00.0 (0300:1002:1636) Display controller ATI Technologies Inc:
--------------------------------------------------------------------------------
                  NAME               VERSION          FREEDRIVER           TYPE
--------------------------------------------------------------------------------
video-hybrid-amd-nvidia-prime            2020.11.30               false            PCI
           video-linux            2018.05.04                true            PCI
     video-modesetting            2020.01.13                true            PCI
            video-vesa            2017.03.12                true            PCI

Please help me out here. Thanks.

2

What happens if you reinstall the old version?

wget http://mirror.easyname.at/manjaro/pool/overlay/sddm-0.19.0-2.2-x86_64.pkg.tar.zst
sudo pacman -U sddm-0.19.0-2.2-x86_64.pkg.tar.zst

Also what is the output of pacman -Q | grep nvidia

3

Hi @philm, thank you for getting back. The URL you provided gives me a 404 error.

Here’s the output of pacman -Q | grep nvidia:

lib32-nvidia-utils 455.45.01-3
linux510-nvidia 455.45.01-8
linux59-nvidia 455.45.01-6
mhwd-nvidia 455.45.01-3
mhwd-nvidia-340xx 340.108-1
mhwd-nvidia-390xx 390.138-1
nvidia-prime 1.0-4
nvidia-utils 455.45.01-2
4

Hello @Nibba2018 you could try to install from you cache
sudo pacman -U /var/cache/pacman/pkg/sddm-0.19.0-2.2-x86_64.pkg.tar.zst
or install downgrade to make it easy:
sudo pacman -S downgrade
sudo downgrade sddm
I hope you are having better luck than me, i was forced to reinstall.

5

Hey @Narzul, did so but it didn’t work :frowning:

6

What errors are you getting, is it the same as before??

7

Yeah they are the same :confused:

8