Bug 307048

Additional details:

kenorb    2173  0.0  2.1 1364812 83972 ?       Sl   13:42   0:03 /usr/bin/plasma-desktop
$ sudo strace -s0 -fp 2173
Process 2173 attached with 6 threads - interrupt to quit
[pid  2183] restart_syscall(<... resuming interrupted call ...> <unfinished ...>
[pid  2181] futex(0x7f1094616f54, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>
[pid  2177] restart_syscall(<... resuming interrupted call ...> <unfinished ...>
[pid  2176] restart_syscall(<... resuming interrupted call ...> <unfinished ...>
[pid  2174] select(5, [4], NULL, NULL, NULL <unfinished ...>
[pid  2173] restart_syscall(<... resuming interrupted call ...>) = 0
[pid  2173] write(3, ""..., 8)          = 8
[pid  2173] recvfrom(7, ""..., 4096, 0, NULL, NULL) = 4096
[pid  2173] recvfrom(7, ""..., 4096, 0, NULL, NULL) = 3392
[pid  2173] recvfrom(7, 0x19a36d4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
[pid  2173] poll([...], 11, 0)          = 2 ([...])
[pid  2173] read(3, ""..., 16)          = 8
[pid  2173] write(3, ""..., 8)          = 8
[pid  2173] write(3, ""..., 8)          = 8
[pid  2173] poll([...], 1, -1)          = 1 ([...])
[pid  2173] writev(7, [...], 3)         = 4
[pid  2173] poll([...], 1, -1)          = 1 ([...])
[pid  2173] recvfrom(7, ""..., 4096, 0, NULL, NULL) = 32
[pid  2173] recvfrom(7, 0x19a36d4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
[pid  2173] recvfrom(7, 0x19a36d4, 4096, 0, 0, 0) = -1 EAGAIN (Resource temporarily unavailable)
[pid  2173] sendmsg(5, {msg_name(0)=NULL, msg_iov(2)=[...], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 176
[pid  2173] poll([...], 1, 25000)       = 0 (Timeout)
[pid  2173] write(3, ""..., 8)          = 8
[pid  2173] sendmsg(5, {msg_name(0)=NULL, msg_iov(2)=[...], msg_controllen=0, msg_flags=0}, MSG_NOSIGNAL) = 176
[pid  2173] poll([...], 1, 25000)       = ? ERESTART_RESTARTBLOCK (To be restarted)

-HUP signal kill the process. When executing it manually, I've the following errors:
/usr/bin/plasma-desktop &

QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
QDBusConnection: session D-Bus connection created before QCoreApplication. Application may misbehave.
QDBusObjectPath: invalid path ""
plasma-desktop(7387)/libplasma Plasma::isPluginVersionCompatible: unversioned plugin detected, may result in instability 
plasma-desktop(7387)/libplasma Plasma::isPluginVersionCompatible: unversioned plugin detected, may result in instability 

plasma-desktop(7387)/libplasma Plasma::isPluginVersionCompatible: unversioned plugin detected, may result in instability 
plasma-desktop(7387)/libplasma Plasma::isPluginVersionCompatible: unversioned plugin detected, may result in instability 
plasma-desktop(7387)/libplasma Plasma::isPluginVersionCompatible: unversioned plugin detected, may result in instability 
plasma-desktop(7387)/libplasma Plasma::isPluginVersionCompatible: unversioned plugin detected, may result in instability 
plasma-desktop(7387)/libplasma Plasma::isPluginVersionCompatible: unversioned plugin detected, may result in instability 
plasma-desktop(7387)/kdecore (K*TimeZone*): KSystemTimeZones: ktimezoned initialize() D-Bus call failed:  "Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken." 
link XMLID_34_ hasn't been detected!
link XMLID_34_ hasn't been detected!
link XMLID_36_ hasn't been detected!
plasma-desktop(7387) MessageIndicator::adjustViewSize: No parentWidget for applet widget()! 
plasma-desktop(7387) MessageIndicator::adjustViewSize: No parentWidget for applet widget()! 
Connecting to deprecated signal QDBusConnectionInterface::serviceOwnerChanged(QString,QString,QString)
file:///usr/share/kde4/apps/plasma/plasmoids/notifier/contents/ui/devicenotifier.qml:166:5: QML QDeclarativeListView_QML_20: Possible anchor loop detected on vertical anchor.
QGraphicsScene::addItem: item has already been added to this scene
link XMLID_34_ hasn't been detected!
link XMLID_34_ hasn't been detected!
link XMLID_36_ hasn't been detected!
QGridLayoutEngine::addItem: Cell (0, 1) already taken
(process:7387): GLib-GIO-WARNING **: Received property menu with type s does not match expected type o in the expected interface

After 5 minutes it appeared, but the problem is the same.

New errors:
link XMLID_34_ hasn't been detected!
link XMLID_34_ hasn't been detected!
link XMLID_36_ hasn't been detected!
QGridLayoutEngine::addItem: Cell (0, 1) already taken

(process:7387): GLib-GIO-WARNING **: Received property menu with type s does not match expected type o in the expected interface
void DBusMenuImporter::slotGetLayoutFinished(QDBusPendingCallWatcher*): "No such interface `com.canonical.dbusmenu' on object at path /" 
X Error: BadWindow (invalid Window parameter) 3
  Major opcode: 20 (X_GetProperty)
  Resource id:  0x5600012

Errors follow-up:
link XMLID_34_ hasn't been detected!
link XMLID_34_ hasn't been detected!
link XMLID_36_ hasn't been detected!
QGridLayoutEngine::addItem: Cell (0, 1) already taken

(process:7387): GLib-GIO-WARNING **: Received property menu with type s does not match expected type o in the expected interface
void DBusMenuImporter::slotGetLayoutFinished(QDBusPendingCallWatcher*): "No such interface `com.canonical.dbusmenu' on object at path /" 
X Error: BadWindow (invalid Window parameter) 3
  Major opcode: 20 (X_GetProperty)
  Resource id:  0x5600012

Recent link with the similar problem which I found:
http://www.mail-archive.com/active@kde.org/msg00243.html

Related dbus bug:
https://bugs.freedesktop.org/show_bug.cgi?id=55136

Before I was using Unity, but it was even worse, it was freezing all the time, crashing, lots of missing options, just a nightmare. So KDE plasma is kind of relief for me, but it's still not perfect.

Current follow-up:
https://bugs.launchpad.net/ubuntu/+source/kde-baseapps/+bug/1053910

bug is marked as fixed in the downstream bug tracker