The moment I open Amarok, I obtain a popup saying: "the process for file procotol is dead unexpectedly" $ amarok -d all [cut] amarok(2364)/kio (Slave) KIO::Slave::timeout: slave failed to connect to application pid= 2383 protocol= "file" amarok(2364)/kio (Slave) KIO::Slave::timeout: Houston, we lost our slave, pid= 2383 amarok(2364)/kio (Slave) KIO::Slave::timeout: slave died pid = 2383 amarok(2364)/kio (Scheduler) KIO::SchedulerPrivate::jobFinished: KIO::ListJob(0x55e0c7dedd40) KIO::Slave(0x55e0c7007ae0) amarok(2364)/kio (KDirListerCache) KDirListerCache::slotResult: finished listing KUrl("file:///media/archivio") amarok(2364)/kio (Scheduler) KIO::SchedulerPrivate::slotSlaveDied: KIO::Slave(0x55e0c7007ae0) X Error: BadWindow (invalid Window parameter) 3 Major opcode: 20 (X_GetProperty) Resource id: 0x620019d Calling appendChild() on a null node does nothing. amarok(2364)/kio (KDirListerCache) KDirListerCache::stopListingUrl: KDirLister(0x55e0c7e3ca50) url= KUrl("file:///media/archivio") amarok(2364)/kio (KDirListerCache) KDirListerCache::listDir: Listing directory: KUrl("file:///media") amarok(2364)/kio (Scheduler) KIO::SchedulerPrivate::doJob: KIO::SimpleJob(0x55e0c7ded4c0) amarok: BEGIN: void BrowserCategoryList::childViewChanged() amarok: END__: void BrowserCategoryList::childViewChanged() [Took: 0.033s] amarok(2364)/kio (Slave) KIO::Slave::createSlave: createSlave "file" for KUrl("file:///media") amarok(2364)/kio (KIOConnection) KIO::ConnectionServer::listenForRemote: Listening on "local:/run/user/1000/ksocket-userdpmVZ/amarokgx2364.slave-socket" amarok(2364)/kio (KDirListerCache) KDirListerCache::stopListingUrl: KDirLister(0x55e0c7e3ca50) url= KUrl("file:///media") amarok(2364)/kio (Scheduler) KIO::SchedulerPrivate::cancelJob: KIO::ListJob(0x55e0c7ded4c0) KIO::Slave(0x55e0c8bf0970) amarok(2364)/kio (Scheduler) KIO::SchedulerPrivate::cancelJob: Scheduler: killing slave 2396 amarok(2364)/kio (Slave) KIO::Slave::kill: killing slave pid 2396 ( "file://" ) amarok(2364)/kio (Scheduler) KIO::SchedulerPrivate::jobFinished: KIO::ListJob(0x55e0c7ded4c0) KIO::Slave(0x55e0c8bf0970) amarok(2364)/kio (KDirListerCache) KDirListerCache::slotResult: finished listing KUrl("file:///media") amarok(2364)/kio (KDirListerCache) KDirListerCache::listDir: Listing directory: KUrl("file:///") amarok(2364)/kio (Scheduler) KIO::SchedulerPrivate::doJob: KIO::SimpleJob(0x55e0c8b7cbf0) amarok: BEGIN: void BrowserCategoryList::childViewChanged() amarok: END__: void BrowserCategoryList::childViewChanged() [Took: 0.029s] amarok(2364)/kio (Slave) KIO::Slave::createSlave: createSlave "file" for KUrl("file:///") amarok(2364)/kio (KIOConnection) KIO::ConnectionServer::listenForRemote: Listening on "local:/run/user/1000/ksocket-userdpmVZ/amarokDL2364.slave-socket" amarok(2364)/kio (Slave) KIO::Slave::timeout: slave failed to connect to application pid= 2397 protocol= "file" amarok(2364)/kio (Slave) KIO::Slave::timeout: Houston, we lost our slave, pid= 2397 amarok(2364)/kio (Slave) KIO::Slave::timeout: slave died pid = 2397 amarok(2364)/kio (Scheduler) KIO::SchedulerPrivate::jobFinished: KIO::ListJob(0x55e0c8b7cbf0) KIO::Slave(0x55e0c8cf7b30) amarok(2364)/kio (KDirListerCache) KDirListerCache::slotResult: finished listing KUrl("file:///") amarok(2364)/kio (Scheduler) KIO::SchedulerPrivate::slotSlaveDied: KIO::Slave(0x55e0c8cf7b30) X Error: BadWindow (invalid Window parameter) 3 Major opcode: 20 (X_GetProperty) Resource id: 0x62001b2 =========== Packages infos # dnf list installed | grep kio audiocd-kio.x86_64 16.08.2-1.fc24 @updates audiocd-kio-doc.noarch 16.08.2-1.fc24 @updates audiocd-kio-libs.x86_64 16.08.2-1.fc24 @updates kdesdk-kioslaves.x86_64 16.08.2-1.fc24 @updates kf5-kio-core.x86_64 5.27.0-1.fc24 @updates kf5-kio-core-libs.x86_64 5.27.0-1.fc24 @updates kf5-kio-debuginfo.x86_64 5.27.0-1.fc24 @updates-debuginfo kf5-kio-doc.noarch 5.27.0-1.fc24 @updates kf5-kio-file-widgets.x86_64 5.27.0-1.fc24 @updates kf5-kio-gui.x86_64 5.27.0-1.fc24 @updates kf5-kio-ntlm.x86_64 5.27.0-1.fc24 @updates kf5-kio-widgets.x86_64 5.27.0-1.fc24 @updates kf5-kio-widgets-libs.x86_64 5.27.0-1.fc24 @updates kio-extras.x86_64 16.08.2-1.fc24 @updates kio-upnp-ms.x86_64 1.0.0-9.20111102git.fc24 @@commandline kio_msits.x86_64 7:16.08.2-1.fc24 @updates kio_mtp.x86_64 0.75-13.20141221gitc418634.fc24 kio_sysinfo.x86_64 20090930-13.fc24 @@commandline # rpm -q plasma-desktop plasma-desktop-5.8.3-2.fc24.x86_64 # rpm -q amarok amarok-2.8.90-7.fc24.x86_64
I've seen more reports of kioslave processes dying including sftp. I wonder what changed in kio?
This happens on all Qt based applications
For posterity, some more documented ways to debug ioslaves, https://community.kde.org/Guidelines_and_HOWTOs/Debugging/Debugging_IOSlaves
I could not retrieve logs with the guide I followed because the affected application use KDE libs 4, not KDE Framework 5. I followed [1] and the moment I run kdeinit4 Konsole showed some messages about ~/. files, but I haven't paid attention to them. Suddenly the problem disappeared. I even tried to relogin, reboot the system, but there is no way to reproduce it again. This is very strange because I experienced it for ~ more than an entire week... Anyway, thanks to Rex Dieter and Pino Toscano [1]: https://community.kde.org/Guidelines_and_HOWTOs/Debugging/Debugging_IOSlaves#GUI_.28Qt4.2Fkdelibs4_instructions.29