plasma crashed with SIGSEGV in QByteArray::replace() (after changing screen resolution)

[Tomas Van Verrewegen]

Binary package hint: kdebase-workspace

When I change screen resolution (via xrandr, krandrtray, or systemsettings) Plasma always crashes. After the crash it is impossible to relaunch Plasma, I have to restart kdm.

Console output when I launch plasma after such a crash:

sokopok@sokopok:~$ plasma
<unknown program name>(7777)/ checkComposite: Plasma has an argb visual 0x708d40 23068673
<unknown program name>(7777)/ checkComposite: Plasma is COMPOSITE-less on 0x707fd0
QLayout: Attempting to add QLayout "" to QWidget "", which already has a layout
plasma(7778) Solid::Control::ManagerBasePrivate::loadBackend: Backend loaded: "NetworkManager 0.7"
plasma(7778) NetworkManagerApplet::NetworkManagerApplet: 251
plasma(7778) NetworkManagerApplet::NetworkManagerApplet: true "" ""
plasma(7778) NetworkManagerSettings::NetworkManagerSettings: "org.freedesktop.NetworkManagerUserSettings" true
plasma(7778) NetworkManagerSettings::NetworkManagerSettings: "org.freedesktop.NetworkManagerSystemSettings" true
plasma(7778) NetworkManagerSettings::initConnections: "/org/freedesktop/NetworkManagerSettings/0"
plasma(7778) RemoteConnection::RemoteConnection: "802-3-ethernet"
"KConfigIni: In file /usr/share/kubuntu-default-settings/kde4-profile/default/share/config/kickoffrc, line 3: " Invalid entry (missing '=')
plasma(7778) KServiceFactory::findServiceByDesktopPath: "findServiceByDesktopPath: systemsettings not found"
plasma(7778) KServiceFactory::findServiceByDesktopPath: "findServiceByDesktopPath: /home/sokopok/.kde/share/apps/RecentDocuments/passwords.txt.desktop not found"
plasma(7778) KServiceFactory::findServiceByDesktopPath: "findServiceByDesktopPath: /home/sokopok/.kde/share/apps/RecentDocuments/282577.desktop not found"
plasma(7778) KServiceFactory::findServiceByDesktopPath: "findServiceByDesktopPath: /home/sokopok/.kde/share/apps/RecentDocuments/sokopok.desktop not found"
plasma(7778) KServiceFactory::findServiceByDesktopPath: "findServiceByDesktopPath: /home/sokopok/.kde/share/apps/RecentDocuments/Database.txt.desktop not found"
plasma(7778) KServiceFactory::findServiceByDesktopPath: "findServiceByDesktopPath: /home/sokopok/.kde/share/apps/RecentDocuments/Hub.org (1).desktop not found"
plasma(7778) KServiceFactory::findServiceByDesktopPath: "findServiceByDesktopPath: /home/sokopok/.kde/share/apps/RecentDocuments/GetJob.aspx.desktop not found"
plasma(7778) KServiceFactory::findServiceByDesktopPath: "findServiceByDesktopPath: /home/sokopok/.kde/share/apps/RecentDocuments/Downloads.desktop not found"
plasma(7778) Solid::Control::ManagerBasePrivate::loadBackend: Backend loaded: "HAL-Power"
Object::connect: Attempt to bind non-signal TaskManager::TaskGroup::editRequest()
plasma(7778) NetworkManagerApplet::init:
plasma(7778) NetworkManagerApplet::showWired: SHOWING
plasma(7778) InterfaceGroup::InterfaceGroup: TYPE 1
plasma(7778) InterfaceItem::setNameDisplayMode: Product: "Networking Interface"
plasma(7778) InterfaceItem::activeConnectionsChanged: ("/org/freedesktop/NetworkManager/ActiveConnection/0")
plasma(7778) InterfaceItem::activeConnectionsChanged: ... updating active connection list for "/org/freedesktop/Hal/devices/net_00_1e_c9_01_29_81" "eth0"
plasma(7778) InterfaceItem::activeConnectionsChanged: "/org/freedesktop/NetworkManager/ActiveConnection/0" looking up connection "/org/freedesktop/NetworkManagerSettings/0" on "system-settings-service"
plasma(7778) InterfaceItem::activeConnectionsChanged: "eth0" Active connections:
plasma(7778) InterfaceItem::activeConnectionsChanged: "/org/freedesktop/NetworkManager/ActiveConnection/0" "/org/freedesktop/NetworkManagerSettings/0"
plasma(7778) InterfaceItem::activeConnectionsChanged: ("/org/freedesktop/NetworkManager/ActiveConnection/0")
plasma(7778) InterfaceItem::activeConnectionsChanged: ... updating active connection list for "/org/freedesktop/Hal/devices/net_00_1e_c9_01_29_81" "eth0"
plasma(7778) InterfaceItem::activeConnectionsChanged: "/org/freedesktop/NetworkManager/ActiveConnection/0" looking up connection "/org/freedesktop/NetworkManagerSettings/0" on "system-settings-service"
plasma(7778) InterfaceItem::activeConnectionsChanged: "eth0" Active connections:
plasma(7778) InterfaceItem::activeConnectionsChanged: "/org/freedesktop/NetworkManager/ActiveConnection/0" "/org/freedesktop/NetworkManagerSettings/0"
plasma(7778) InterfaceItem::connectionStateChanged: EMIT
plasma(7778) InterfaceItem::setEnabled: true
plasma(7778) WiredConnectionInspector::accept: RemoteConnection(0x93ccd0)
plasma(7778) WiredConnectionInspector::accept: 1
plasma(7778) WiredConnectionInspector::accept: Solid::Control::WiredNetworkInterface(0x908bb0)
plasma(7778) WiredConnectionInspector::accept: true
plasma(7778) NetworkManagerApplet::showWireless: SHOWING
plasma(7778) InterfaceGroup::InterfaceGroup: TYPE 2
plasma(7778) InterfaceItem::setNameDisplayMode: Product: "WLAN Interface"
plasma(7778) InterfaceItem::activeConnectionsChanged: ("/org/freedesktop/NetworkManager/ActiveConnection/0")
plasma(7778) InterfaceItem::activeConnectionsChanged: ... updating active connection list for "/org/freedesktop/Hal/devices/net_00_1d_e0_71_e7_5f" "wlan0"
plasma(7778) InterfaceItem::activeConnectionsChanged: "wlan0" Interface has no active connections
plasma(7778) InterfaceItem::connectionStateChanged: EMIT
plasma(7778) WirelessInterfaceItem::setConnectionInfo: FIXME: tjkActive connections is empty while connected?
plasma(7778) WirelessInterfaceItem::setEnabled: true
plasma(7778) InterfaceItem::setEnabled: true
plasma(7778) InterfaceGroup::addInterfaceInternal: WiFi added
plasma(7778) WirelessInterfaceItem::setEnabled: true
plasma(7778) InterfaceItem::setEnabled: true
QCoreApplication::postEvent: Unexpected null receiver
plasma(7778): ""min" - conversion of "-1,-1" to QSizeF failed"
plasma(7778): ""max" - conversion of "-1,-1" to QSizeF failed"
plasma(7778): ""min" - conversion of "-1,-1" to QSizeF failed"
plasma(7778): ""max" - conversion of "-1,-1" to QSizeF failed"
plasma(7778): ""min" - conversion of "-1,-1" to QSizeF failed"
plasma(7778): ""max" - conversion of "-1,-1" to QSizeF failed"

... (last 2 lines are repeated many (many) times)

plasma(7777): Communication problem with "plasma" , it probably crashed.
Error message was: "org.freedesktop.DBus.Error.NoReply" : " "Message did not receive a reply (timeout by message bus)" "

ProblemType: Crash
Architecture: amd64
CrashCounter: 1
DistroRelease: Ubuntu 9.04
ExecutablePath: /usr/bin/plasma
Package: kdebase-workspace-bin 4:4.2.2-0ubuntu2
ProcCmdline: /usr/bin/plasma
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Signal: 11
SourcePackage: kdebase-workspace
StacktraceTop:
 QByteArray::replace () from /usr/lib/libQtCore.so.4
 ?? () from /usr/lib/libkdecore.so.5
 KConfigGroup::writeEntry ()
 KConfigGroup::writeEntry ()
 ?? () from /usr/lib/libkdeinit4_plasma.so
Title: plasma crashed with SIGSEGV in QByteArray::replace()
Uname: Linux 2.6.28-11-generic x86_64
UserGroups: adm admin cdrom dialout lpadmin plugdev sambashare

[Apport retracing service (apport)]

StacktraceTop:QByteArray::replace (this=0x7fff9cd80df0,
KConfigGroupPrivate::serializeList (
KConfigGroup::writeEntry (this=0x7fff9cd81790,
KConfigGroup::writeEntry (this=0x7fff9cd81790,
PanelView::pinchContainment (this=0x22b1920,

[Tomas Van Verrewegen (tomasvanverrewegen)]

1. After some experiments, I figured out that this only happens when the screen resolution is changed to something smaller than 800x600.
2. I installed the release version of Ubuntu 9.04 recently (was running the beta before) and here the problems seems to be fixed.