How to install pi-greeter on top of lightdm and avoid X11

[robertoj]

Hello,

 

I am trying to have a graphical login screen for my orange pi zero 3 with ili9488 LCD screen. A problem I have is that X11 can't start with the LCD driver... so I need to stay 100% wayland.

 

I was able to compile and run labwc with these instructions: https://forum.armbian.com/topic/53797-labwc-wayland-crashes-on-exit/#findComment-223267

 

Labwc runs well on a HDMI screen and in the small ili9488 screen

 

Next, I found this graphical login, which is made to install on top of lightdm: https://github.com/raspberrypi-ui/pi-greeter/tree/master

 

Compilation rerequisites: sudo apt install gobject-introspection libgtk-3-dev liblightdm-gobject-dev libgtk-layer-shell-dev

 

Lightdm requirement: sudo apt install accountsservice

 

Compile it:

$ autogen.sh

$ ./configure

$ make

$ sudo make install

 

There are some hints to post-install in the debian package postint:

$ update-alternatives --install /usr/share/xgreeters/lightdm-greeter.desktop lightdm-greeter /usr/share/xgreeters/pi-greeter.desktop 70

In lightdm.conf: greeter-session=pi-greeter

 

I check the lightdm configuration:

$ update-alternatives --display lightdm-greeter
lightdm-greeter - auto mode
  link best version is /usr/local/share/xgreeters/pi-greeter.desktop
  link currently points to /usr/local/share/xgreeters/pi-greeter.desktop
  link lightdm-greeter is /usr/share/xgreeters/lightdm-greeter.desktop
/usr/local/share/xgreeters/pi-greeter.desktop - priority 70
/usr/share/xgreeters/lightdm-gtk-greeter.desktop - priority 60

 

Then I erase the link to lightdm-gtk: sudo rm /usr/share/xgreeters/lightdm-gtk-greeter.desktop

 

When I try to start lightdm with sudo systemctl start lightdm, fails with:

Job for lightdm.service failed because the control process exited with error code.

 

In journalctl logs, $ journalctl -xeu lightdm.service I see

 

Aug 09 09:18:19 orangepizero3 systemd[1]: lightdm.service: Main process exited, code=exited, status=1/FAILURE
░░ Subject: Unit process exited
░░ Defined-By: systemd
░░ Support: https://www.debian.org/support
░░ 
░░ An ExecStart= process belonging to unit lightdm.service has exited.
░░ 
░░ The process' exit code is 'exited' and its exit status is 1.
Aug 09 09:18:19 orangepizero3 systemd[1]: lightdm.service: Failed with result 'exit-code'.
░░ Subject: Unit failed
░░ Defined-By: systemd
░░ Support: https://www.debian.org/support
░░ 
░░ The unit lightdm.service has entered the 'failed' state with result 'exit-code'.
Aug 09 09:18:19 orangepizero3 systemd[1]: Failed to start lightdm.service - Light Display Manager.
░░ Subject: A start job for unit lightdm.service has failed
░░ Defined-By: systemd
░░ Support: https://www.debian.org/support
░░ 
░░ A start job for unit lightdm.service has finished with a failure.
░░ 
░░ The job identifier is 6519 and the job result is failed.

 

 

Does anybody have experience in installing pi-greet, or another greeter that would work in wayland? I need it to be efficient

 

THANK YOU!

Edited Saturday at 07:00 PM by robertoj

[robertoj]

I get this warning because I removed lightdm-gtk-greeter.desktop... what should I do to not expect the file?

 

roberto@orangepizero3:~$ update-alternatives --display lightdm-greeter
update-alternatives: warning: alternative /usr/share/xgreeters/lightdm-gtk-greeter.desktop (part of link group lightdm-greeter) doesn't exist; removing from list of alternatives
lightdm-greeter - auto mode
  link best version is /usr/local/share/xgreeters/pi-greeter.desktop
  link currently points to /usr/local/share/xgreeters/pi-greeter.desktop
  link lightdm-greeter is /usr/share/xgreeters/lightdm-greeter.desktop
/usr/local/share/xgreeters/pi-greeter.desktop - priority 70

 

 

After some research of greeters, I see that the default greeter is compatible with wayland

https://github.com/Xubuntu/lightdm-gtk-greeter

I have been working as if lightdm requires X11 (which I need to avoid), and so I wanted to used pi-greeter

 

Does anybody have lightdm+gtkgreeter in a pure wayland setup? No X11

Edited Sunday at 09:45 PM by robertoj