Here's the results of the logs for sddm:
ps -eaf | grep sddm
root 1497 1 0 17:59 ? 00:00:00 /usr/bin/sddm
root 1501 1497 0 17:59 tty1 00:00:00 /usr/libexec/Xorg -nolisten
tcp -auth /var/run/sddm/{a1d9270c-38d2-4241-8d36-caf7228d5813} -background
none -noreset -displayfd 16 -seat seat0 vt1
root 1640 1497 0 17:59 ? 00:00:00 /usr/libexec/sddm-helper
--socket /tmp/sddm-autheb500c3c-e0c2-4f60-a477-8589baccf976 --id 2 --start
/usr/bin/sddm-greeter --socket /tmp/sddm-:0-WzNaeg --theme
/usr/share/sddm/themes/01-breeze-fedora --user sddm --greeter
sddm 1641 1 0 17:59 ? 00:00:00 /usr/lib/systemd/systemd
--user
sddm 1643 1641 0 17:59 ? 00:00:00 (sd-pam)
sddm 1648 1641 0 17:59 ? 00:00:00 /usr/bin/pulseaudio
--daemonize=no
sddm 1649 1640 1 17:59 ? 00:00:00 /usr/bin/sddm-greeter
--socket /tmp/sddm-:0-WzNaeg --theme /usr/share/sddm/themes/01-breeze-fedora
sddm 1674 1641 0 17:59 ? 00:00:00 /usr/bin/dbus-daemon
--session --address=systemd: --nofork --nopidfile --systemd-activation
--syslog-only
sddm 1700 1648 0 17:59 ? 00:00:00
/usr/libexec/pulse/gconf-helper
sddm 1702 1641 0 17:59 ? 00:00:00 /usr/libexec/gconfd-2
testuser 1789 1740 0 18:00 tty2 00:00:00 grep --color=auto sddm
journalctl -b 0 | grep sddm
Aug 18 17:59:36 testlaptop.test.domail audit[1]: SERVICE_START pid=1 uid=0
auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0
msg='unit=sddm comm="systemd" exe="/usr/lib/systemd/systemd" hostname=?
addr=? terminal=? res=success'
Aug 18 17:59:38 testlaptop.test.domail audit[1640]: USER_AUTH pid=1640
uid=0 auid=4294967295 ses=4294967295
subj=system_u:system_r:xdm_t:s0-s0:c0.c1023 msg='op=PAM:authentication
grantors=pam_permit acct="sddm" exe="/usr/libexec/sddm-helper" hostname=?
addr=? terminal=? res=success'
Aug 18 17:59:38 testlaptop.test.domail audit[1640]: USER_ACCT pid=1640
uid=0 auid=4294967295 ses=4294967295
subj=system_u:system_r:xdm_t:s0-s0:c0.c1023 msg='op=PAM:accounting
grantors=pam_permit acct="sddm" exe="/usr/libexec/sddm-helper" hostname=?
addr=? terminal=? res=success'
Aug 18 17:59:38 testlaptop.test.domail audit[1640]: CRED_ACQ pid=1640 uid=0
auid=4294967295 ses=4294967295 subj=system_u:system_r:xdm_t:s0-s0:c0.c1023
msg='op=PAM:setcred grantors=pam_permit acct="sddm"
exe="/usr/libexec/sddm-helper" hostname=? addr=? terminal=? res=success'
Aug 18 17:59:38 testlaptop.test.domail sddm-helper[1640]:
pam_unix(sddm-greeter:session): session opened for user sddm by (uid=0)
Aug 18 17:59:38 testlaptop.test.domail systemd[1]: Created slice User Slice
of sddm.
Aug 18 17:59:38 testlaptop.test.domail systemd-logind[1254]: New session c1
of user sddm.
Aug 18 17:59:38 testlaptop.test.domail systemd[1]: Started Session c1 of
user sddm.
Aug 18 17:59:38 testlaptop.test.domail audit[1641]: USER_ACCT pid=1641
uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0
msg='op=PAM:accounting grantors=pam_unix,pam_localuser acct="sddm"
exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Aug 18 17:59:38 testlaptop.test.domail systemd[1641]:
pam_unix(systemd-user:session): session opened for user sddm by (uid=0)
Aug 18 17:59:38 testlaptop.test.domail audit[1641]: USER_START pid=1641
uid=0 auid=995 ses=1 subj=system_u:system_r:init_t:s0
msg='op=PAM:session_open
grantors=pam_selinux,pam_selinux,pam_loginuid,pam_keyinit,pam_limits,pam_systemd,pam_unix
acct="sddm" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=?
res=success'
Aug 18 17:59:38 testlaptop.test.domail audit[1640]: USER_START pid=1640
uid=0 auid=4294967295 ses=4294967295
subj=system_u:system_r:xdm_t:s0-s0:c0.c1023 msg='op=PAM:session_open
grantors=pam_unix,pam_systemd acct="sddm" exe="/usr/libexec/sddm-helper"
hostname=? addr=? terminal=:0 res=success'
Aug 18 17:59:39 testlaptop.test.domail sddm-greeter[1649]: Loading
file:///usr/share/sddm/themes/01-breeze-fedora/Main.qml...
Aug 18 17:59:39 testlaptop.test.domail sddm-greeter[1649]: QObject: Cannot
create children for a parent that is in a different thread.
Aug 18 17:59:39 testlaptop.test.domail sddm-greeter[1649]: QObject: Cannot
create children for a parent that is in a different thread.
Aug 18 17:59:39 testlaptop.test.domail sddm-greeter[1649]: QObject: Cannot
create children for a parent that is in a different thread.
Aug 18 17:59:39 testlaptop.test.domail sddm-greeter[1649]: QObject: Cannot
create children for a parent that is in a different thread.
Aug 18 17:59:39 testlaptop.test.domail sddm-greeter[1649]:
QObject::installEventFilter(): Cannot filter events for objects in a
different thread.
Aug 18 17:59:39 testlaptop.test.domail sddm-greeter[1649]: QObject: Cannot
create children for a parent that is in a different thread.
Aug 18 17:59:39 testlaptop.test.domail sddm-greeter[1649]: QObject: Cannot
create children for a parent that is in a different thread.
Aug 18 17:59:39 testlaptop.test.domail sddm-greeter[1649]:
QObject::installEventFilter(): Cannot filter events for objects in a
different thread.
Aug 18 17:59:39 testlaptop.test.domail sddm-greeter[1649]: Cannot watch
QRC-like path ":/icons/hicolor/index.theme"
Aug 18 17:59:39 testlaptop.test.domail dbus-daemon[1284]: [system]
Activating via systemd: service name='org.freedesktop.UPower'
unit='upower.service' requested by ':1.46' (uid=995 pid=1649
comm="/usr/bin/sddm-greeter --socket /tmp/sddm-:0-WzNaeg"
label="system_u:system_r:xdm_t:s0-s0:c0.c1023")
Everything appears fine with the nVidia settings app and the System
settings once KDE has loaded.
I'll try again with LightDM in a couple hours, my ravening horde is at the
babygates!
Thomas
On Fri, Aug 17, 2018 at 7:43 PM Tim via users <users@lists.fedoraproject.org>
wrote:
> Allegedly, on or about 15 August 2018, Thomas Letherby sent:
> > I tried with LightDM, which gave the same black screen, with the
> > following in /var/log/messages, not sure why it's trying to talk to
> > PulseAudio?
>
> I'm not sure what stage you're up to by then: Just getting the logon
> screen, or have logged in?
>
> If it's the login screen, it could be that they've designed it so that
> it can make use of audio (e.g. spoken prompts for the blind), and the
> sound system is started whether, or not, it's actually going to be
> used. And I've seen logon screens which play a little tune as they pop
> up (on other distros, where the sound actually was working at that
> stage).
>
> --
> [tim@localhost ~]$ uname -rsvp
> Linux 4.16.11-100.fc26.x86_64 #1 SMP Tue May 22 20:02:12 UTC 2018 x86_64
>
> Boilerplate: All mail to my mailbox is automatically deleted.
> There is no point trying to privately email me, I only get to see
> the messages posted to the mailing list.
>
> Windows tablets are more like suppositories.
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