Re: [gentoo-user] Login manager occasionally fails to show

[Michael <confabulate@kintzios.com>]

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On Sunday 2 February 2025 11:09:09 Greenwich Mean Time Markus Gustafsson 
wrote:
> This is my /var/log/sddm.log from an unsuccessful upstart:
> > [11:57:20.087] (II) DAEMON: Initializing...
> > [11:57:20.090] (II) DAEMON: Starting...
> > [11:57:20.090] (II) DAEMON: Logind interface found
> > [11:57:20.091] (II) DAEMON: Adding new display...
> > [11:57:20.091] (II) DAEMON: Loaded empty theme configuration
> > [11:57:20.092] (II) DAEMON: Xauthority path: "/run/sddm/xauth_LWFoRx"
> > [11:57:20.092] (II) DAEMON: Using VT 7
> > [11:57:20.092] (II) DAEMON: Display server starting...
> > [11:57:20.092] (II) DAEMON: Writing cookie to "/run/sddm/xauth_LWFoRx"
> > [11:57:20.092] (II) DAEMON: Running: /usr/bin/X -nolisten tcp -background
> > none -seat seat0 vt7 -auth /run/sddm/xauth_LWFoRx -noreset -displayfd 16
> > [11:57:21.377] (II) DAEMON: Setting default cursor
> > [11:57:21.394] (II) DAEMON: Running display setup script 
> > "/usr/share/sddm/scripts/Xsetup" [11:57:21.395] (II) DAEMON: Display
> > server started.
> > [11:57:21.395] (II) DAEMON: Socket server starting...
> > [11:57:21.395] (II) DAEMON: Socket server started.
> > [11:57:21.395] (II) DAEMON: Loaded empty theme configuration
> > [11:57:21.396] (II) DAEMON: Greeter starting...
> > [11:57:21.406] (II) HELPER: [PAM] Starting...
> > [11:57:21.406] (II) HELPER: [PAM] Authenticating...
> > [11:57:21.406] (II) HELPER: [PAM] returning.
> > [11:57:21.425] (II) HELPER: Writing cookie to "/tmp/xauth_ocMfUA"
> > [11:57:21.425] (II) HELPER: Starting X11 session: ""
> > "/usr/bin/sddm-greeter-qt6 --socket /tmp/sddm-:0-lMuEWF" [11:57:21.426]
> > (II) DAEMON: Greeter session started successfully
> > [11:57:21.468] (II) DAEMON: Message received from greeter: Connect
> 
> I think it looks pretty much the same as for a successful one...

There's more happening after this stage with a successful login.

The daemon will register a login received from the greeter and the helper will 
negotiate authentication for the desktop session with PAM, then the helper 
will launch a X11 or Wayland desktop session.  However, if you have no GUI 
display coming up to enter your password, the process will stop where you have 
arrived at above.

Have you set up your haveged service to start at boot?

I don't know if enabling any crypto co-processors available on the MoBo or CPU 
in the BIOS and in your kernel may make a difference.  My SDDM problem was 
related to having enough entropy available when SDDM was launching too soon in 
the boot up process.


> I peeked into ~/.local/share/sddm/wayland-session.log as well, but I got the
> impression that this starts getting written later (after having logged in)?

Yes, this would take place once a desktop session has been set up.  I can't 
recall if you may see some errors in there in cases when SDDM does not 
shutdown and crashes.

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