I don't run haveged, but I think you might be on to something regarding the 
entropy... Googling around shows a lot of people having similar issues. I'm 
gonna try out haveged and see if it improved the situation.

On Sun, Feb 2, 2025, at 14:11, Michael wrote:
> 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.
> Attachments:
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