Blackscreen at login & Can't change login theme, Permission denied

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1

Hello,

When i start up my laptop Dell Precision 5530, i don’t see a login screen i just see black screen and i usually just type my password and it let me login but if i make mistake then i need to restart laptop to blindly login.

When i ran updates it automatically changed my theme from Breeze to Breath2 and i can’t change it back, it gives me permission denied error.

DBus Backend error: service start org.kde.kcontrol.kcmsddm failed: Failed to execute program org.kde.kcontrol.kcmsddm: Permission denied"

Screenshot_20210406_102554
Screenshot_20210406_1025541131×655 153 KB

I have NVIDIA-SMI 465.19.01 driver installed with this GitHub - Frogging-Family/nvidia-all: Nvidia driver 460 to 396 series AIO installer

This is my sddm.conf file from /etc and i haven’t changed anything from that file.

[Autologin]
Relogin=false
Session=plasma

[General]
HaltCommand=/usr/bin/systemctl poweroff
InputMethod=
Numlock=none
RebootCommand=/usr/bin/systemctl reboot

[Theme]
Current=breath2
CursorTheme=breeze_cursors
DisableAvatarsThreshold=7
EnableAvatars=true
FacesDir=/usr/share/sddm/faces
ThemeDir=/usr/share/sddm/themes

[Users]
DefaultPath=/usr/local/sbin:/usr/local/bin:/usr/bin
HideShells=
HideUsers=
MaximumUid=60000
MinimumUid=1000
RememberLastSession=true
RememberLastUser=true
ReuseSession=false

[Wayland]
EnableHiDPI=false
SessionCommand=/usr/share/sddm/scripts/wayland-session
SessionDir=/usr/share/wayland-sessions
SessionLogFile=.local/share/sddm/wayland-session.log

[X11]
DisplayCommand=/usr/share/sddm/scripts/Xsetup
DisplayStopCommand=/usr/share/sddm/scripts/Xstop
EnableHiDPI=false
MinimumVT=1
ServerArguments=-nolisten tcp
ServerPath=/usr/bin/X
SessionCommand=/usr/share/sddm/scripts/Xsession
SessionDir=/usr/share/xsessions
SessionLogFile=.local/share/sddm/xorg-session.log
UserAuthFile=.Xauthority
XauthPath=/usr/bin/xauth
XephyrPath=/usr/bin/Xephyr

If you need more information and this is my first post here so if i am missing something then just ask it away.

Thanks in advance!

2

Can anyone help me out? if you need more information then just ask.

3

Hi, welcome to the Manjaro community. It looks to me like you have a polkit issue, and at a guess this may be down to an incomplete update or filesystem error after your last update. I would try the following in this order:

  1. Log out of GUI, switch to tty2 with Ctrl+Alt+F2, log in and run sudo pacman -Syyu to force database refresh and update, to make sure system is fully updated.
  2. I assume your filesystem is being checked on boot either with fsck mkinitcpio hook, or systemd (please let me know if unsure how to check). You may still have a corrupted configuration file somewhere though, so it is probably worth making a new user to see if the issue persists there.

You can also check to see that your polkit service is active for your user(s) using ps aux | grep polkit.

4

Hallo Summrum,

Thanks for the warm welcome!

I logged in to tty2 and refreshed & updated everything, there ware a lot of updates.
I restarted my laptop and went again to tty2 to create a second user and restarted my laptop again.

When the laptop was booted it was blackscreen at login usually i just type password and i am in but now there are 2 users and entering my password was not working because you have to select a user and i cant see anything so i just went to tty2 and deleted the user.
With that i could login again by typing my password at the blackscreen(loginscreen).

Here is the result of polkit:

[jawido@JPC-5530 ~/]$ ps aux | grep polkit
polkitd 853 0.0 0.1 2983448 24288 ? Ssl 10:03 0:00 /usr/lib/polkit-1/polkitd --no-debug
jawido 2011 0.0 0.2 430488 47872 ? Sl 10:03 0:00 /usr/lib/polkit-kde-authentication-agent-1
jawido 52636 0.0 0.0 6428 2292 pts/1 S+ 10:12 0:00 grep --colour=auto polkit

Anything else i can try? the problem is still there