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#1 2024-11-12 23:00:22

broms
Member
From: USA
Registered: 2016-07-07
Posts: 15

[Solved] Black Screen With Cursor After Login

starting today, I can no longer login to a desktop, all I get is a black screen and a cursor. Earlier I was using plasma and before that cinnamon.

I'm currently using light-dm (but have tried sddm with the same results) and can no longer log in to either desktop environment.

lightdm conf:

[LightDM]
log-directory=/var/log/lightdm
run-directory=/run/lightdm

[Seat:*]
pam-service=lightdm-autologin
pam-autologin-service=lightdm-autologin
pam-greeter-service=lightdm-greeter
-session=
session-wrapper=/etc/lightdm/Xsession
autologin-guest=false
autologin-user=<myuser>
autologin-user-timeout=0
autologin-in-background=false
autologin-session=

when I try to manually start plasma from an ssh connection I get a plasma loading screen then back to the black desktop with a cursor:

startplasma-wayland
Initializing  "/usr/lib/qt6/plugins/plasma/kcms/systemsettings/kcm_mouse.so"
kcm_mouse: Error on receiving device list from KWin.
Initializing  "/usr/lib/qt6/plugins/plasma/kcms/systemsettings/kcm_style.so"
/usr/bin/xrdb: Can't open display ''
/usr/bin/xsetroot:  unable to open display ''
Initializing  "/usr/lib/qt6/plugins/plasma/kcms/systemsettings/kcm_fonts.so"
org.kde.plasma.session: process job  "kcminit_startup" finished with exit code  0
kf.coreaddons: The plugin "/usr/lib/qt6/plugins/kaccounts/daemonplugins/gdrive.so" explicitly states an Id in the embedded metadata, which is different from the one derived from the filename The Id field from the KPlugin object in the metadata should be removed

(process:1237): dconf-WARNING **: 17:52:27.672: failed to commit changes to dconf: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not activate remote peer 'ca.desrt.dconf': unit failed

(process:1237): dconf-WARNING **: 17:52:27.673: failed to commit changes to dconf: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not activate remote peer 'ca.desrt.dconf': unit failed

(process:1237): dconf-WARNING **: 17:52:27.673: failed to commit changes to dconf: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not activate remote peer 'ca.desrt.dconf': unit failed

(process:1237): dconf-WARNING **: 17:52:27.673: failed to commit changes to dconf: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not activate remote peer 'ca.desrt.dconf': unit failed

(process:1237): dconf-WARNING **: 17:52:27.674: failed to commit changes to dconf: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not activate remote peer 'ca.desrt.dconf': unit failed

(process:1237): dconf-WARNING **: 17:52:27.674: failed to commit changes to dconf: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not activate remote peer 'ca.desrt.dconf': unit failed

(process:1237): dconf-WARNING **: 17:52:27.674: failed to commit changes to dconf: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not activate remote peer 'ca.desrt.dconf': unit failed

(process:1237): dconf-WARNING **: 17:52:27.715: failed to commit changes to dconf: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not activate remote peer 'ca.desrt.dconf': unit failed

(process:1237): dconf-WARNING **: 17:52:27.715: failed to commit changes to dconf: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not activate remote peer 'ca.desrt.dconf': unit failed

(process:1237): dconf-WARNING **: 17:52:27.715: failed to commit changes to dconf: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not activate remote peer 'ca.desrt.dconf': unit failed

(process:1237): dconf-WARNING **: 17:52:27.716: failed to commit changes to dconf: GDBus.Error:org.freedesktop.DBus.Error.NameHasNoOwner: Could not activate remote peer 'ca.desrt.dconf': unit failed
org.kde.colorcorrectlocationupdater: Geolocator stopped
org.kde.kameleon: found no RGB LED devices
colord: X11 not detect disabling
org.kde.libkbolt: Failed to connect to Bolt manager DBus interface:
org.kde.bolt.kded: Couldn't connect to Bolt DBus daemon
QDBusObjectPath: invalid path "/modules/plasma-session-shortcuts"
kf.dbusaddons: The kded module name "plasma-session-shortcuts" is invalid!
org.kde.plasma.printmanager.kded: unable to register service to dbus
QDBusObjectPath: invalid path "/modules/kded_plasma-welcome"
kf.dbusaddons: The kded module name "kded_plasma-welcome" is invalid!
kf.modemmanagerqt: Failed enumerating MM objects: "org.freedesktop.DBus.Error.NameHasNoOwner"
 "Could not activate remote peer 'org.freedesktop.ModemManager1': activation request failed: unknown unit"
kf.bluezqt: PendingCall Error: "The name is not activatable"
xsettingsd: Loaded 15 settings from /home/<myuser>/.config/xsettingsd/xsettingsd.conf
xsettingsd: Unable to open connection to X server
qt.qpa.wayland: eglSwapBuffers failed with 0x300d, surface: 0x0
qt.qpa.wayland: eglSwapBuffers failed with 0x300d, surface: 0x0

full output of journalctl -b: https://pastebin.com/ak5g8v1Z

kernel 6.11.6
plasma desktop 6.2.3-1
lightdm 1:1.32.0-6

Last edited by broms (2024-11-14 14:39:12)

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#2 2024-11-13 09:05:36

seth
Member
Registered: 2012-09-03
Posts: 58,995

Re: [Solved] Black Screen With Cursor After Login

Nov 12 17:25:16 <myhost> kwin_wayland[836]: No backend specified, automatically choosing drm

Can you log into an X11 session?

Nov 12 17:25:15 <myhost> dbus-broker-launch[798]: Ready
Nov 12 17:25:15 <myhost> dbus-broker[799]: A security policy denied org.freedesktop.systemd1 to receive method call /org/freedesktop/systemd1:org.freedesktop.systemd1.Manager.Subscribe from :1.2.
Nov 12 17:25:15 <myhost> dbus-broker[799]: A security policy denied org.freedesktop.systemd1 to receive method call /org/freedesktop/systemd1:org.freedesktop.systemd1.Manager.SetEnvironment from :1.2.
Nov 12 17:25:15 <myhost> dbus-broker-launch[798]: Updating activation environment failed.
Nov 12 17:25:16 <myhost> dbus-broker[799]: A security policy denied org.freedesktop.systemd1 to receive method call /org/freedesktop/systemd1:org.freedesktop.DBus.Properties.Get from :1.5.
Nov 12 17:25:16 <myhost> dbus-broker[799]: A security policy denied org.freedesktop.systemd1 to receive method call /org/freedesktop/systemd1:org.freedesktop.DBus.Properties.Get from :1.5.
Nov 12 17:25:16 <myhost> dbus-broker[799]: A security policy denied org.freedesktop.systemd1 to receive method call /org/freedesktop/systemd1:org.freedesktop.systemd1.Manager.SetEnvironment from :1.5.
Nov 12 17:25:16 <myhost> dbus-broker[799]: A security policy denied org.freedesktop.systemd1 to receive method call /org/freedesktop/systemd1:org.freedesktop.systemd1.Manager.SetEnvironment from :1.2.
Nov 12 17:25:16 <myhost> dbus-broker-launch[798]: Updating activation environment failed.
Nov 12 17:25:16 <myhost> dbus-broker[799]: A security policy denied org.freedesktop.systemd1 to receive method call /org/freedesktop/systemd1:org.freedesktop.DBus.Properties.Get from :1.5.
Nov 12 17:25:16 <myhost> dbus-broker[799]: A security policy denied org.freedesktop.systemd1 to receive method call /org/freedesktop/systemd1:org.freedesktop.systemd1.Manager.ResetFailed from :1.5.
Nov 12 17:25:16 <myhost> dbus-broker[799]: A security policy denied org.freedesktop.systemd1 to receive method call /org/freedesktop/systemd1:org.freedesktop.systemd1.Manager.Reload from :1.5.
Nov 12 17:25:16 <myhost> dbus-broker[799]: A security policy denied org.freedesktop.systemd1 to receive method call /org/freedesktop/systemd1:org.freedesktop.systemd1.Manager.LoadUnit from :1.2.
Nov 12 17:25:16 <myhost> dbus-broker[799]: A security policy denied org.freedesktop.systemd1 to receive method call /org/freedesktop/systemd1:org.freedesktop.systemd1.Manager.ListUnitFilesByPatterns from :1.5.
Nov 12 17:25:16 <myhost> dbus-broker[799]: A security policy denied org.kde.Startup to receive method call /Startup:org.kde.Startup.updateLaunchEnv from :1.7.
Nov 12 17:25:16 <myhost> dbus-broker[799]: A security policy denied org.kde.Startup to receive method call /Startup:org.kde.Startup.updateLaunchEnv from :1.7.
Nov 12 17:25:16 <myhost> dbus-broker[799]: A security policy denied org.kde.Startup to receive method call /Startup:org.kde.Startup.updateLaunchEnv from :1.7.
Nov 12 17:25:16 <myhost> dbus-broker[799]: A security policy denied org.freedesktop.systemd1 to receive method call /org/freedesktop/systemd1:org.freedesktop.systemd1.Manager.SetEnvironment from :1.7.
Nov 12 17:25:16 <myhost> dbus-broker[799]: A security policy denied org.freedesktop.systemd1 to receive method call /org/freedesktop/systemd1:org.freedesktop.systemd1.Manager.SetEnvironment from :1.2.
Nov 12 17:25:16 <myhost> dbus-broker-launch[798]: Updating activation environment failed.

Also skip the autologin?

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#3 2024-11-13 16:29:02

broms
Member
From: USA
Registered: 2016-07-07
Posts: 15

Re: [Solved] Black Screen With Cursor After Login

Choosing Plasma (X11) loads the same but then the cursor disappears and the screen is entirely black.

with this error:

Nov 13 11:03:55 <myhost> systemd[1]: Started Process Core Dump (PID 964/UID 0).
Nov 13 11:03:55 <myhost> systemd[1]: Started Pass systemd-coredump journal entries to relevant user for potential DrKonqi handling.
Nov 13 11:03:55 <myhost> kded6[868]: colord: Failed to register device: "device id 'xrandr-Samsung Electric Company-SAMSUNG' already exists"
Nov 13 11:03:55 <myhost> kded6[868]: colord: Found colord device "/org/freedesktop/ColorManager/devices/xrandr_Samsung_Electric_Company_SAMSUNG_<myuser>_1000"
Nov 13 11:03:55 <myhost> kded6[868]: colord: Found EDID profile for device "/org/freedesktop/ColorManager/profiles/icc_0edd9cb88ba6f5474ff509e12a72a2ca_<myuser>_1000" "HDMI-A-0"
Nov 13 11:03:55 <myhost> kded6[868]: colord: Device changed "/org/freedesktop/ColorManager/devices/xrandr_Samsung_Electric_Company_SAMSUNG_<myuser>_1000"
Nov 13 11:03:55 <myhost> kded6[868]: colord: profileDefault "/org/freedesktop/ColorManager/profiles/icc_0edd9cb88ba6f5474ff509e12a72a2ca_<myuser>_1000"
Nov 13 11:03:55 <myhost> kded6[868]: colord: Default Profile Filename "HDMI-A-0" "/home/<myuser>/.local/share/icc/edid-e614f07874a7f5462c362aa133638787.icc"
Nov 13 11:03:55 <myhost> kded6[868]: colord: Profile does not have any VCGT data, reseting "HDMI-A-0" "/home/<myuser>/.local/share/icc/edid-e614f07874a7f5462c362aa133638787.icc"
Nov 13 11:03:55 <myhost> kded6[868]: colord: Primary CRTC is at CRTC  0
Nov 13 11:03:55 <myhost> kded6[868]: colord: CRTC for CRTC  1  has no mode or no output, skipping
Nov 13 11:03:55 <myhost> kded6[868]: colord: CRTC for CRTC  2  has no mode or no output, skipping
Nov 13 11:03:55 <myhost> kded6[868]: colord: CRTC for CRTC  3  has no mode or no output, skipping
Nov 13 11:03:55 <myhost> kded6[868]: colord: Setting X atom (id: 0 ) "_ICC_PROFILE" on output: "HDMI-A-0"
Nov 13 11:03:55 <myhost> kded6[868]: colord: EDID ICC Profile already exists "/home/<myuser>/.local/share/icc/edid-e614f07874a7f5462c362aa133638787.icc"
Nov 13 11:03:55 <myhost> systemd-coredump[965]: [?] Process 960 (smartctl) of user 0 dumped core.

                                               Stack trace of thread 960:
                                               #0  0x0000777cbdca53f4 n/a (libc.so.6 + 0x963f4)
                                               #1  0x0000777cbdc4c120 raise (libc.so.6 + 0x3d120)
                                               #2  0x0000777cbdc334c3 abort (libc.so.6 + 0x244c3)
                                               #3  0x0000777cbdc34354 n/a (libc.so.6 + 0x25354)
                                               #4  0x0000777cbdcaf765 n/a (libc.so.6 + 0xa0765)
                                               #5  0x0000777cbdcb1c4c n/a (libc.so.6 + 0xa2c4c)
                                               #6  0x0000777cbdcb45ce __libc_free (libc.so.6 + 0xa55ce)
                                               #7  0x000055d4bb6d18d2 n/a (smartctl + 0x448d2)
                                               #8  0x0000777cbdc4e891 n/a (libc.so.6 + 0x3f891)
                                               #9  0x0000777cbdc4e95e exit (libc.so.6 + 0x3f95e)
                                               #10 0x0000777cbdc34e0f n/a (libc.so.6 + 0x25e0f)
                                               #11 0x0000777cbdc34ecc __libc_start_main (libc.so.6 + 0x25ecc)
                                               #12 0x000055d4bb699af5 n/a (smartctl + 0xcaf5)
                                               ELF object binary architecture: AMD x86-64
Nov 13 11:03:55 <myhost> systemd[1]: systemd-coredump@0-964-0.service: Deactivated successfully.

using Plasma (X11) post-login journalctl -b: https://pastebin.com/ykpqiUY8

startx over ssh also fails:

/usr/lib/Xorg.wrap: Only console users are allowed to run the X server
xinit: giving up
xinit: unable to connect to X server: Connection refused
xinit: server error
Couldn't get a file descriptor referring to the console.

removing all autologin lines from lightdm.conf results in the same black screeen + cursor when selecting Plasma (Wayland) and
still getting 

Nov 13 11:15:09 <myhost> dbus-broker[793]: A security policy denied org.freedesktop.systemd1 to receive method call /org/freedesktop/systemd1:org.freedesktop.systemd1.Manager.SetEnvironment from :1.2.
Nov 13 11:15:09 <myhost> dbus-broker-launch[791]: Updating activation environment failed.

no autologin, Plasma (Wayland): full journalctl -b: https://pastebin.com/Uhvm5xcZ

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#4 2024-11-13 21:47:36

seth
Member
Registered: 2012-09-03
Posts: 58,995

Re: [Solved] Black Screen With Cursor After Login

Sidebar, you've NM and networkd enabled => disable systemd-networkd.


The only trace of  a KDE session is

Nov 13 11:15:10 <myhost> kwin_wayland[816]: No backend specified, automatically choosing drm

Can you log into plasma w/ a fresh user?

pacman -Qikk plasma-workspace

(therere those ugly smartclt aborts, but I'm not sure what to make out of them…

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#5 2024-11-13 22:21:33

broms
Member
From: USA
Registered: 2016-07-07
Posts: 15

Re: [Solved] Black Screen With Cursor After Login

pacman -Qikk plasma-workspace
Name            : plasma-workspace
Version         : 6.2.3-1
Description     : KDE Plasma Workspace
Architecture    : x86_64
URL             : https://kde.org/plasma-desktop/
Licenses        : LGPL-2.0-or-later
Groups          : plasma
Provides        : None
Depends On      : accountsservice  appstream-qt  dbus  fontconfig  freetype2
                  gcc-libs  glibc  icu  kactivitymanagerd  karchive  kauth
                  kbookmarks  kcmutils  kcolorscheme  kcompletion  kconfig
                  kconfigwidgets  kcoreaddons  kcrash  kde-cli-tools
                  kdeclarative  kded  kdbusaddons  kglobalaccel  kguiaddons
                  kholidays  ki18n  kiconthemes  kidletime  kio  kio-extras
                  kio-fuse  kirigami  kirigami-addons  kitemmodels  kjobwidgets
                  knewstuff  knotifications  knotifyconfig  kpackage  kparts
                  kpipewire  krunner  kquickcharts  kscreenlocker  kservice
                  kstatusnotifieritem  ksvg  ksystemstats  ktexteditor
                  ktextwidgets  kunitconversion  kuserfeedback  kwallet
                  kwayland  kwidgetsaddons  kwin  kwindowsystem  kxmlgui
                  layer-shell-qt  libcanberra  libice  libkexiv2  libksysguard
                  libplasma  libqalculate  libsm  libx11  libxau  libxcb
                  libxcrypt  libxcursor  libxfixes  libxft  libxtst  milou
                  ocean-sound-theme  phonon-qt6  plasma-activities
                  plasma-activities-stats  plasma5support  prison  qt6-5compat
                  qt6-base  qt6-declarative  qt6-positioning  qt6-svg
                  qt6-tools  qt6-virtualkeyboard  qt6-wayland  sh  solid
                  systemd-libs  wayland  xcb-util  xcb-util-image
                  xorg-xmessage  xorg-xrdb  xorg-xsetroot  xorg-xwayland  zlib
                  plasma-integration
Optional Deps   : appmenu-gtk-module: global menu support for GTK2 and some GTK3
                  applications
                  baloo: Baloo search runner [installed]
                  discover: manage applications installation from the launcher
                  [installed]
                  gpsd: GPS based geolocation
                  kdepim-addons: displaying PIM events in the calendar
                  [installed]
                  kwayland-integration: Wayland integration for Qt5 applications
                  networkmanager-qt: IP based geolocation [installed]
                  plasma-workspace-wallpapers: additional wallpapers [installed]
                  plasma5-integration: use Plasma settings in Qt5 applications
                  xdg-desktop-portal-gtk: sync font settings to Flatpak apps
Required By     : kdeplasma-addons  plasma-browser-integration  plasma-desktop
                  plasma-nm  plasma-pa  plasma-vault  powerdevil
                  xdg-desktop-portal-kde
Optional For    : None
Conflicts With  : plasma-wayland-session
Replaces        : plasma-wayland-session
Installed Size  : 54.53 MiB
Packager        : Tomaz Canabrava <tcanabrava@archlinux.org>
Build Date      : Tue 05 Nov 2024 01:32:56 PM EST
Install Date    : Fri 08 Nov 2024 08:11:16 PM EST
Install Reason  : Explicitly installed
Install Script  : No
Validated By    : Signature

plasma-workspace: 6916 total files, 0 altered files

fresh user login results in the same black desktop with cursor.
journalctl -b: https://pastebin.com/CgpDMd0F

several hundred lines of this error:

Nov 13 17:09:52 <myhost> kwin_wayland[805]: No QSGTexture provided from updateSampledImage(). This is wrong.

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#6 2024-11-13 22:35:50

seth
Member
Registered: 2012-09-03
Posts: 58,995

Re: [Solved] Black Screen With Cursor After Login

Nov 13 17:09:40 <myhost> startplasma-wayland[765]: QIODevice::readLine (QFile, "/home/<mynewuser>/.config/kdedefaults/package"): device not open
Nov 13 17:09:40 <myhost> startplasma-wayland[765]: QPixmap: QGuiApplication must be created before calling defaultDepth().
Nov 13 17:09:40 <myhost> startplasma-wayland[765]: QPixmap: QGuiApplication must be created before calling defaultDepth().
…
Nov 13 17:09:52 <myhost> kwin_wayland[805]: No QSGTexture provided from updateSampledImage(). This is wrong.
Nov 13 17:09:52 <myhost> kwin_wayland[805]: No QSGTexture provided from updateSampledImage(). This is wrong.
Nov 13 17:09:52 <myhost> kwin_wayland[805]: No QSGTexture provided from updateSampledImage(). This is wrong.
…

Can you start a KDE/X11 session w/ the new user (and what does the journal look like)?
If not, can you switch to a different VT or ssh in and "DISPLAY=:0 startplasma-x11" there?

Sanity check: "black screen with cursor" refers to a mouse cursor or a blinking underscore?

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#7 2024-11-13 23:25:05

broms
Member
From: USA
Registered: 2016-07-07
Posts: 15

Re: [Solved] Black Screen With Cursor After Login

Signing in with the fresh user to plasma (x11) session resulted in the KDE welcome dialogs popping up. After progressing through them, I'm returned to the black screen with the mouse cursor. It's always a mouse cursor (I probably should have said pointer in my OP)--it's like the desktop is loaded but there's nothing there and no interactivity. When using wayland, hot corners work, so I'm able to add virtual desktops. With X11 I can do nothing.

journalctl -b: https://pastebin.com/cJEtHnKw

DISPLAY=:0 startplasma-x11

Authorization required, but no authorization protocol specified

$DISPLAY is not set or cannot connect to the X server.

and the black screen with mouse cursor remains.

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#8 2024-11-14 08:10:14

seth
Member
Registered: 2012-09-03
Posts: 58,995

Re: [Solved] Black Screen With Cursor After Login

Authorization required, but no authorization protocol specified

Did you log in as the same user that failed to run the GUI session?

Couldn't start kglobalaccel from org.kde.kglobalaccel.service: QDBusError("org.freedesktop.DBus.Error.ServiceUnknown", "The name is not activatable")

'key - *something* is broken on the installation.

sudo LC_ALL=C pacman -Qkk | grep -v ', 0 altered files' | grep -v backup

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#9 2024-11-14 14:38:37

broms
Member
From: USA
Registered: 2016-07-07
Posts: 15

Re: [Solved] Black Screen With Cursor After Login

Thank you so much.

I must have made breaking edits to the dbus session.conf file. I restored it from another installation and everything works as expected again.

Really appreciate your help.

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