KDE session display scrambled (was Re: sddm blank screen)

[Tobias C. Berner]

Moin moin

does it work properly if you start plasma desktop via startx instead of sddm?


mfg Tobias

On Sun, 15 Dec 2019 at 03:00, Graham Menhennitt
<graham at menhennitt.com.au> wrote:
>
> It turns out that the problem I described below was due to the wrong NVidia driver being loaded. It appears that I now need to use the -390 version rather than the default -440 version. So now sddm-greeter doesn't crash and I get the login screen correctly.
>
> But after I login, the screen goes crazy. I get a bunch of horizontal white lines appearing which make it seem like I'm looking out a window through venetian blinds. I can make out the icons for some of the programs that are running (Firefox etc.) but it's effective unusable.
>
> My video card is a GeForce GT 730. And I'm running 12-Stable on AMD64.
>
> Do I now need an Xorg.conf perhaps?
>
> Does anybody have any ideas, please?
>
> Thanks,
>
>     Graham
>
>
> On 11/12/19 10:28 pm, Graham Menhennitt wrote:
>
> Following up myself...
>
> Some time after the screen goes blank (about 10 seconds), I get a message logged:
>
>     pid 1178 (sddm-greeter), jid 0, uid 219: exited on signal 6 (core dumped)
>
> When I run lldb with sddm-greeter and the core file, I get the following stack backtrace. Does that help?
>
> In the meantime, I'll try building Qt with debug symbols.
>
> Thanks,
>
>     Graham
>
> * thread #1, name = 'sddm-greeter', stop reason = signal SIGABRT
>   * frame #0: 0x0000000801c3b86a libc.so.7`__sys_thr_kill at thr_kill.S:3
>     frame #1: 0x0000000801c39c94 libc.so.7`__raise(s=6) at raise.c:52:10
>     frame #2: 0x0000000801badf09 libc.so.7`abort at abort.c:67:8
>     frame #3: 0x0000000801655919 libQt5Core.so.5`___lldb_unnamed_symbol156$$libQt5Core.so.5 + 9
>     frame #4: 0x0000000801656f7e libQt5Core.so.5`QMessageLogger::fatal(char const*, ...) const + 202
>     frame #5: 0x0000000800527e99 libQt5Quick.so.5`QSGRenderLoop::handleContextCreationFailure(QQuickWindow*, bool) + 297
>     frame #6: 0x0000000800528539 libQt5Quick.so.5`___lldb_unnamed_symbol2048$$libQt5Quick.so.5 + 505
>     frame #7: 0x0000000800528cf8 libQt5Quick.so.5`___lldb_unnamed_symbol2049$$libQt5Quick.so.5 + 72
>     frame #8: 0x000000080104b21b libQt5Gui.so.5`QWindow::event(QEvent*) + 907
>     frame #9: 0x000000080059dd5e libQt5Quick.so.5`QQuickWindow::event(QEvent*) + 814
>     frame #10: 0x0000000801839842 libQt5Core.so.5`QCoreApplicationPrivate::notify_helper(QObject*, QEvent*) + 338
>     frame #11: 0x0000000801839362 libQt5Core.so.5`QCoreApplication::notifyInternal2(QObject*, QEvent*) + 210
>     frame #12: 0x000000080103ebcc libQt5Gui.so.5`QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) + 332
>     frame #13: 0x0000000801020afc libQt5Gui.so.5`QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 220
>     frame #14: 0x00000008055b58bf libQt5XcbQpa.so.5`___lldb_unnamed_symbol344$$libQt5XcbQpa.so.5 + 31
>     frame #15: 0x00000008029483c7 libglib-2.0.so.0`g_main_context_dispatch + 311
>     frame #16: 0x0000000802948753 libglib-2.0.so.0`___lldb_unnamed_symbol117$$libglib-2.0.so.0 + 515
>     frame #17: 0x0000000802948804 libglib-2.0.so.0`g_main_context_iteration + 100
>     frame #18: 0x0000000801891e06 libQt5Core.so.5`QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 102
>     frame #19: 0x0000000801834a0e libQt5Core.so.5`QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 494
>     frame #20: 0x0000000801839ace libQt5Core.so.5`QCoreApplication::exec() + 142
>     frame #21: 0x00000000002696a4 sddm-greeter`___lldb_unnamed_symbol211$$sddm-greeter + 996
>     frame #22: 0x000000000025510f sddm-greeter`___lldb_unnamed_symbol1$$sddm-greeter + 271
>
>
> On 11/12/19 6:39 pm, Graham Menhennitt wrote:
>
> Hello all,
>
> I'm running KDE on FreeBSD 12-Stable as of last week. I rebuilt all of my ports and now I can't get sddm to start properly. When it starts, my display switches to vt 9 and all I see is an empty screen. I've uninstalled, rebuilt, and reinstalled the port.
>
> If I stop sddm and run startx, I correctly get a few xterms so I think the X side of things is working correctly.
>
> Below is a session from sddm.log.
>
> Does anybody have any clues, please?
>
> Thanks in advance for any help,
>
>     Graham
>
>
> On starting with "service sddm onestart":
>
> [18:11:50.940] (II) DAEMON: No session manager found
>
> [18:11:50.940] (II) DAEMON: Adding new display on vt 9 ...
> [18:11:50.941] (II) DAEMON: Loading theme configuration from ""
> [18:11:50.941] (II) DAEMON: Display server starting...
> [18:11:50.941] (II) DAEMON: Running: /usr/local/bin/X -nolisten tcp -auth /var/run/sddm/{96b45809-91c0-4a86-8533-01e4ef2920f9} -background none -noreset -displayfd 11 -seat seat0 vt9
> [18:11:51.629] (II) DAEMON: Setting default cursor
> [18:11:51.631] (WW) DAEMON: Could not setup default cursor
> [18:11:51.631] (II) DAEMON: Running display setup script "/usr/local/share/sddm/scripts/Xsetup"
> [18:11:51.633] (II) DAEMON: Display server started.
> [18:11:51.633] (II) DAEMON: Socket server starting...
> [18:11:51.633] (II) DAEMON: Socket server started.
> [18:11:51.633] (II) DAEMON: Loading theme configuration from "/usr/local/share/sddm/themes/breeze/theme.conf"
> [18:11:51.633] (II) DAEMON: Greeter starting...
> [18:11:51.634] (II) DAEMON: Adding cookie to "/var/run/sddm/{96b45809-91c0-4a86-8533-01e4ef2920f9}"
> [18:11:51.637] (II) DAEMON: Starting...
> [18:11:51.641] (II) HELPER: [PAM] Starting...
> [18:11:51.641] (II) HELPER: [PAM] Authenticating...
> [18:11:51.641] (II) HELPER: [PAM] returning.
> [18:11:51.641] (II) HELPER: Starting: "/usr/local/share/sddm/scripts/Xsession /usr/local/bin/sddm-greeter --socket /tmp/sddm-:0-TFJyQI --theme /usr/local/share/sddm/themes/breeze"
> [18:11:51.643] (II) DAEMON: Greeter session started successfully
> [18:11:51.924] (II) DAEMON: Message received from greeter: Connect
> [18:12:00.558] (II) HELPER: [PAM] Closing session
> [18:12:00.558] (II) HELPER: [PAM] Ended.
> [18:12:00.559] (II) DAEMON: Auth: sddm-helper exited successfully
>
> [18:12:00.559] (II) DAEMON: Greeter stopped.
>
>
>
>
> And when I stop it using "service sddm stop":
>
> [18:22:58.038] (WW) DAEMON: Signal received: SIGTERM
> [18:22:58.038] (II) DAEMON: Socket server stopping...
> [18:22:58.038] (II) DAEMON: Socket server stopped.
> [18:22:58.039] (II) DAEMON: Display server stopping...
> [18:22:58.059] (II) DAEMON: Display server stopped.
> [18:22:58.059] (II) DAEMON: Running display stop script "/usr/local/share/sddm/scripts/Xstop"
>
>