> I installed the drivers using the below. Problem is the same, black screen on boot, but you can shift to another terminal and startx. The nVidia control panel shows the driver loaded and reports OK.
I've got exactly the same problem. I'm on F27. I have had a black sddm
screen for 5 weeks (started July 7th 2018) but startx works from a
terminal.
Also on DELL computer but on a Precision 7810 tower. Also with nvidia drivers.
Here is an error I found in journalctl (full log below):
Aug 11 21:03:25 gamma sddm-greeter[2143]: Failed to create OpenGL
context for format QSurfaceFormat(version 2.0, options
QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24,
redBufferSize -1, greenBufferSize -1, blueBufferSize -1,
alphaBufferSize -1, stencilBufferSize 8, sam
F
Aug 11 21:03:23 gamma sddm-helper[2135]:
pam_unix(sddm-greeter:session): session opened for user sddm by
(uid=0)
Aug 11 21:03:23 gamma systemd[1]: Created slice User Slice of sddm.
Aug 11 21:03:23 gamma systemd[1]: Starting User Manager for UID 991...
Aug 11 21:03:23 gamma systemd-logind[1582]: New session c1 of user sddm.
Aug 11 21:03:23 gamma systemd[1]: Started Session c1 of user sddm.
Aug 11 21:03:23 gamma audit[2136]: USER_ACCT pid=2136 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 11 21:03:23 gamma audit[2136]: USER_ROLE_CHANGE pid=2136 uid=0
auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0
msg='pam: default-context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
selected-context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023
Aug 11 21:03:23 gamma systemd[2136]: pam_unix(systemd-user:session):
session opened for user sddm by (uid=0)
Aug 11 21:03:23 gamma audit[2136]: USER_START pid=2136 uid=0 auid=991
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
Aug 11 21:03:23 gamma systemd[2136]: Reached target Timers.
Aug 11 21:03:23 gamma systemd[2136]: Reached target Paths.
Aug 11 21:03:23 gamma systemd[2136]: Starting D-Bus User Message Bus Socket.
Aug 11 21:03:23 gamma systemd[2136]: Listening on D-Bus User Message Bus Socket.
Aug 11 21:03:23 gamma systemd[2136]: Reached target Sockets.
Aug 11 21:03:23 gamma systemd[2136]: Reached target Basic System.
Aug 11 21:03:23 gamma audit[1]: SERVICE_START pid=1 uid=0
auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0
msg='unit=user@991 comm="systemd" exe="/usr/lib/systemd/systemd"
hostname=? addr=? terminal=? res=success'
Aug 11 21:03:23 gamma systemd[2136]: Reached target Default.
Aug 11 21:03:23 gamma systemd[2136]: Startup finished in 48ms.
Aug 11 21:03:23 gamma systemd[1]: Started User Manager for UID 991.
Aug 11 21:03:23 gamma audit[2135]: USER_START pid=2135 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 11 21:03:24 gamma audit[2143]: AVC avc: denied { map } for
pid=2143 comm="sddm-greeter" path="/dev/nvidiactl" dev="devtmpfs"
ino=40248 scontext=system_u:system_r:xdm_t:s0-s0:c0.c1023
tcontext=system_u:object_r:xserver_misc_device_t:s0 tclass=chr_file
permissive=0
Aug 11 21:03:24 gamma sddm-greeter[2143]: QGLXContext: Failed to
create dummy context
Aug 11 21:03:24 gamma sddm-greeter[2143]: Loading
file:///usr/share/sddm/themes/breeze/Main.qml...
Aug 11 21:03:24 gamma sddm-greeter[2143]: QObject: Cannot create
children for a parent that is in a different thread.
(Parent is
SDDM::GreeterApp(0x7ffd9a256a40), parent's thread is
QThread(0x559b5888be90), current thread is QThread(0x559b588f6730)
Aug 11 21:03:24 gamma sddm-greeter[2143]: QObject: Cannot create
children for a parent that is in a different thread.
(Parent is
SDDM::GreeterApp(0x7ffd9a256a40), parent's thread is
QThread(0x559b5888be90), current thread is QThread(0x559b588f6730)
Aug 11 21:03:24 gamma sddm-greeter[2143]: QObject: Cannot create
children for a parent that is in a different thread.
(Parent is
SDDM::GreeterApp(0x7ffd9a256a40), parent's thread is
QThread(0x559b5888be90), current thread is QThread(0x559b588f6730)
Aug 11 21:03:24 gamma sddm-greeter[2143]: QObject: Cannot create
children for a parent that is in a different thread.
(Parent is
SDDM::GreeterApp(0x7ffd9a256a40), parent's thread is
QThread(0x559b5888be90), current thread is QThread(0x559b588f6730)
Aug 11 21:03:24 gamma sddm-greeter[2143]:
QObject::installEventFilter(): Cannot filter events for objects in a
different thread.
Aug 11 21:03:24 gamma sddm-greeter[2143]: QObject: Cannot create
children for a parent that is in a different thread.
(Parent is
SDDM::GreeterApp(0x7ffd9a256a40), parent's thread is
QThread(0x559b5888be90), current thread is QThread(0x559b588f6730)
Aug 11 21:03:24 gamma systemd[2136]: Started D-Bus User Message Bus.
Aug 11 21:03:24 gamma sddm-greeter[2143]: QObject: Cannot create
children for a parent that is in a different thread.
(Parent is
SDDM::GreeterApp(0x7ffd9a256a40), parent's thread is
QThread(0x559b5888be90), current thread is QThread(0x559b588f6730)
Aug 11 21:03:24 gamma sddm-greeter[2143]:
QObject::installEventFilter(): Cannot filter events for objects in a
different thread.
Aug 11 21:03:24 gamma sddm-greeter[2143]: Cannot watch QRC-like path
":/icons/hicolor/index.theme"
Aug 11 21:03:24 gamma dbus-daemon[1461]: [system] Activating via
systemd: service name='org.freedesktop.UDisks2' unit='udisks2.service'
requested by ':1.20' (uid=991 pid=2143 comm="/usr/bin/sddm-greeter
--socket /tmp/sddm-:0-DsEIlN"
label="system_u:system_r:xdm_t:s0-s0:c0.c1023")
Aug 11 21:03:24 gamma systemd[1]: Starting Disk Manager...
Aug 11 21:03:24 gamma udisksd[2150]: udisks daemon version 2.7.6 starting
Aug 11 21:03:24 gamma dbus-daemon[1461]: [system] Successfully
activated service 'org.freedesktop.UDisks2'
Aug 11 21:03:24 gamma audit[1]: SERVICE_START pid=1 uid=0
auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0
msg='unit=udisks2 comm="systemd" exe="/usr/lib/systemd/systemd"
hostname=? addr=? terminal=? res=success'
Aug 11 21:03:24 gamma systemd[1]: Started Disk Manager.
Aug 11 21:03:24 gamma udisksd[2150]: Acquired the name
org.freedesktop.UDisks2 on the system message bus
Aug 11 21:03:24 gamma dbus-daemon[1461]: [system] Activating via
systemd: service name='org.freedesktop.UPower' unit='upower.service'
requested by ':1.20' (uid=991 pid=2143 comm="/usr/bin/sddm-greeter
--socket /tmp/sddm-:0-DsEIlN"
label="system_u:system_r:xdm_t:s0-s0:c0.c1023")
Aug 11 21:03:24 gamma systemd[1]: Starting Daemon for power management...
Aug 11 21:03:24 gamma dbus-daemon[1461]: [system] Successfully
activated service 'org.freedesktop.UPower'
Aug 11 21:03:24 gamma systemd[1]: Started Daemon for power management.
Aug 11 21:03:24 gamma audit[1]: SERVICE_START pid=1 uid=0
auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0
msg='unit=upower comm="systemd" exe="/usr/lib/systemd/systemd"
hostname=? addr=? terminal=? res=success'
Aug 11 21:03:24 gamma sddm-greeter[2143]:
file:///usr/share/sddm/themes/breeze/components/VirtualKeyboard.qml:20:1:
module "QtQuick.VirtualKeyboard" is not installed
Aug 11 21:03:25 gamma sddm-greeter[2143]: QDBusConnection: name
'org.freedesktop.UDisks2' had owner '' but we thought it was ':1.21'
Aug 11 21:03:25 gamma sddm-greeter[2143]: Failed to create OpenGL
context for format QSurfaceFormat(version 2.0, options
QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24,
redBufferSize -1, greenBufferSize -1, blueBufferSize -1,
alphaBufferSize -1, stencilBufferSize 8, sam
Aug 11 21:03:25 gamma audit[2143]: ANOM_ABEND auid=4294967295 uid=991
gid=986 ses=4294967295 subj=system_u:system_r:xdm_t:s0-s0:c0.c1023
pid=2143 comm="sddm-greeter" exe="/usr/bin/sddm-greeter" sig=6 res=1
Aug 11 21:03:25 gamma systemd[1]: Created slice
system-systemd\x2dcoredump.slice.
Aug 11 21:03:25 gamma systemd[1]: Started Process Core Dump (PID 2190/UID 0).
Aug 11 21:03:25 gamma audit[1]: SERVICE_START pid=1 uid=0
auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0
msg='unit=systemd-coredump@0-2190-0 comm="systemd"
exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=?
res=success'
Aug 11 21:03:25 gamma sddm-helper[2135]:
pam_unix(sddm-greeter:session): session closed for user sddm
Aug 11 21:03:25 gamma audit[2135]: USER_END pid=2135 uid=0
auid=4294967295 ses=4294967295
subj=system_u:system_r:xdm_t:s0-s0:c0.c1023 msg='op=PAM:session_close
grantors=pam_unix,pam_systemd acct="sddm"
exe="/usr/libexec/sddm-helper" hostname=? addr=? terminal=:0
res=success'
Aug 11 21:03:25 gamma audit[2135]: CRED_DISP pid=2135 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=:0 res=success'
Aug 11 21:03:25 gamma sddm[1698]: Auth: sddm-helper exited with 6
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