KDE 4.1 beta 1 plasma crashes on startup

[Rodney Gedda]

Binary package hint: kdebase-workspace

Running Kubuntu Hardy.

Just upgraded to the new KDE 4.1 beta 1 packages and now I can't get a KDE 4.x desktop as plasma crashes right after login. I can log in but there's no kickoff, applets, etc, just a black screen with a mouse cursor. Can only launch apps with krunner (alt-F2).

Here's the back trace....

Application: Plasma Workspace (plasma), signal SIGSEGV
[Thread debugging using libthread_db enabled]
[New Thread 0xb5633720 (LWP 6424)]
[New Thread 0xb2c4fb90 (LWP 6436)]
[New Thread 0xb3c2eb90 (LWP 6425)]
[KCrash handler]
#6 0xb76f7f14 in QObject::connect () from /usr/lib/libQtCore.so.4
#7 0xb2f50c15 in SystemTrayWidget::x11Event (this=0x81d9170,
    event=0xbfc34a68)
    at /build/buildd/kdebase-workspace-4.0.80/plasma/applets/systemtray/systemtraywidget.cpp:92
#8 0xb6d2ed92 in QApplication::x11ProcessEvent () from /usr/lib/libQtGui.so.4
#9 0xb6d583ba in ?? () from /usr/lib/libQtGui.so.4
#10 0xb5aa0bf8 in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
#11 0xb5aa3e5e in ?? () from /usr/lib/libglib-2.0.so.0
#12 0xb5aa43ac in g_main_context_iteration () from /usr/lib/libglib-2.0.so.0
#13 0xb770ff98 in QEventDispatcherGlib::processEvents ()
   from /usr/lib/libQtCore.so.4
#14 0xb6d581b5 in ?? () from /usr/lib/libQtGui.so.4
#15 0xb76e392d in QEventLoop::processEvents () from /usr/lib/libQtCore.so.4
#16 0xb76e3abd in QEventLoop::exec () from /usr/lib/libQtCore.so.4
#17 0xb76e5d3d in QCoreApplication::exec () from /usr/lib/libQtCore.so.4
#18 0xb6cc4567 in QApplication::exec () from /usr/lib/libQtGui.so.4
#19 0xb7fc0456 in kdemain (argc=1, argv=0xbfc34ea4)
    at /build/buildd/kdebase-workspace-4.0.80/plasma/plasma/main.cpp:54
#20 0x08048582 in main (argc=1852731235, argv=0x746365)
    at /build/buildd/kdebase-workspace-4.0.80/obj-i486-linux-gnu/plasma/plasma/plasma-qgv_dummy.cpp:3
#0 0xffffe410 in __kernel_vsyscall ()

Hope this helps. Will definitely need to resolve before these much anticipated packages are announced to Kubuntu users.

[Rodney Gedda (rodney-gedda)]

Removing the existing ~/.kde4/share/config/plasma-appletsrc file seems to eliminate the problem.

A new file will be created and KDE 4.1 beta 1 will start properly.

This bug has been reported upstream:

http://bugs.kde.org/show_bug.cgi?id=163142

[Jonathan Thomas (echidnaman)]

Ah, right. I remember this bug... Systrays in smaller-than-normal panels would cause plasma to crash.
This was fixed in Beta 2, by the way.

[Benny (bm-cage)]

I have the same type of bug, but in Kubuntu current.
changed some plasma settings, did update as the notifier asked it, then did reload as notifier told me to do, now after login no plasma, only a black screen and backtrace as in attachment

[Jamie (solowinter)]

A friend of mine is having the same problem in Kubuntu 8.10. Once she logs in, plasma crashes and leaves her with a black screen. Unfortunately I don't have more details.