Public bug reported: I did nothing specifically. Suddenly most things were frozen. I could still move the mouse and also move windows around but most clicks were ignored. Clicking on the close-button gave me visual feedback but did nothing. After switching to tty1 and back, all windows became blank.
This is all the time I start KDE, mostly after starting any application (like Dolphin or KDE settings). I recognized that there were some messages in syslog which might be related. Here with some context: Nov 4 13:25:03 hcompneu rtkit-daemon[1615]: Successfully made thread 11327 of process 11327 (n/a) owned by '1001' high priority at nice level -11. Nov 4 13:25:03 hcompneu rtkit-daemon[1615]: Supervising 1 threads of 1 processes of 1 users. Nov 4 13:25:03 hcompneu pulseaudio[11327]: [pulseaudio] pid.c: Stale PID file, overwriting. Nov 4 13:25:03 hcompneu rtkit-daemon[1615]: Successfully made thread 11333 of process 11327 (n/a) owned by '1001' RT at priority 5. Nov 4 13:25:03 hcompneu rtkit-daemon[1615]: Supervising 2 threads of 1 processes of 1 users. Nov 4 13:25:03 hcompneu rtkit-daemon[1615]: Successfully made thread 11334 of process 11327 (n/a) owned by '1001' RT at priority 5. Nov 4 13:25:03 hcompneu rtkit-daemon[1615]: Supervising 3 threads of 1 processes of 1 users. Nov 4 13:25:03 hcompneu rtkit-daemon[1615]: Successfully made thread 11346 of process 11346 (n/a) owned by '1001' high priority at nice level -11. Nov 4 13:25:03 hcompneu rtkit-daemon[1615]: Supervising 4 threads of 2 processes of 1 users. Nov 4 13:25:03 hcompneu pulseaudio[11346]: [pulseaudio] pid.c: Daemon already running. Nov 4 13:25:05 hcompneu pulseaudio[11327]: [pulseaudio] module-x11-xsmp.c: module-x11-xsmp may not be loaded twice. Nov 4 13:25:05 hcompneu pulseaudio[11327]: [pulseaudio] module.c: Failed to load module "module-x11-xsmp" (argument: "display=:0 session_manager=local/hcompneu:@/tmp/.ICE-unix/11169,unix/hcompneu:/tmp/.ICE-unix/11169"): initialization failed. Nov 4 13:26:35 hcompneu acpid: client 10462[0:0] has disconnected Nov 4 13:26:35 hcompneu acpid: client 10462[0:0] has disconnected Nov 4 13:26:35 hcompneu acpid: client connected from 10462[0:0] Nov 4 13:26:35 hcompneu acpid: 1 client rule loaded Nov 4 13:26:36 hcompneu acpid: client connected from 10462[0:0] Nov 4 13:26:36 hcompneu acpid: 1 client rule loaded Nov 4 13:27:32 hcompneu whoopsie[1008]: online Nov 4 13:27:33 hcompneu whoopsie[1008]: online Nov 4 13:27:59 hcompneu kernel: [ 1682.487721] INFO: task kworker/0:4:2207 blocked for more than 120 seconds. Nov 4 13:27:59 hcompneu kernel: [ 1682.487730] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 4 13:27:59 hcompneu kernel: [ 1682.487735] kworker/0:4 D ffff88006fc14580 0 2207 2 0x00000000 Nov 4 13:27:59 hcompneu kernel: [ 1682.487771] Workqueue: events_long flush_old_commits [reiserfs] Nov 4 13:27:59 hcompneu kernel: [ 1682.487776] ffff8800402d3c78 0000000000000046 ffff8800402d3fd8 0000000000014580 Nov 4 13:27:59 hcompneu kernel: [ 1682.487785] ffff8800402d3fd8 0000000000014580 ffff88004bb7aee0 ffffc90010554000 Nov 4 13:27:59 hcompneu kernel: [ 1682.487792] ffff88004bb7aee0 ffffc900105540d8 ffff8800379a7800 ffff8800379a7800 Nov 4 13:27:59 hcompneu kernel: [ 1682.487799] Call Trace: Nov 4 13:27:59 hcompneu kernel: [ 1682.487812] [<ffffffff816ea579>] schedule+0x29/0x70 Nov 4 13:27:59 hcompneu kernel: [ 1682.487834] [<ffffffffa0061263>] queue_log_writer+0x83/0xc0 [reiserfs] Nov 4 13:27:59 hcompneu kernel: [ 1682.487844] [<ffffffff81094950>] ? wake_up_state+0x20/0x20 Nov 4 13:27:59 hcompneu kernel: [ 1682.487864] [<ffffffffa0065e51>] do_journal_end.isra.22+0x1b1/0xed0 [reiserfs] Nov 4 13:27:59 hcompneu kernel: [ 1682.487882] [<ffffffffa0066cac>] ? do_journal_begin_r+0x13c/0x3e0 [reiserfs] Nov 4 13:27:59 hcompneu kernel: [ 1682.487901] [<ffffffffa00675c9>] journal_end_sync+0x69/0x70 [reiserfs] Nov 4 13:27:59 hcompneu kernel: [ 1682.487917] [<ffffffffa0052ef1>] reiserfs_sync_fs+0x61/0x80 [reiserfs] Nov 4 13:27:59 hcompneu kernel: [ 1682.487933] [<ffffffffa0052f5e>] flush_old_commits+0x4e/0x60 [reiserfs] Nov 4 13:27:59 hcompneu kernel: [ 1682.487941] [<ffffffff8107d05c>] process_one_work+0x17c/0x430 Nov 4 13:27:59 hcompneu kernel: [ 1682.487948] [<ffffffff8107dcac>] worker_thread+0x11c/0x3c0 Nov 4 13:27:59 hcompneu kernel: [ 1682.487955] [<ffffffff8107db90>] ? manage_workers.isra.24+0x2a0/0x2a0 Nov 4 13:27:59 hcompneu kernel: [ 1682.487963] [<ffffffff810847b0>] kthread+0xc0/0xd0 Nov 4 13:27:59 hcompneu kernel: [ 1682.487971] [<ffffffff810846f0>] ? kthread_create_on_node+0x120/0x120 Nov 4 13:27:59 hcompneu kernel: [ 1682.487979] [<ffffffff816f516c>] ret_from_fork+0x7c/0xb0 Nov 4 13:27:59 hcompneu kernel: [ 1682.487987] [<ffffffff810846f0>] ? kthread_create_on_node+0x120/0x120 Nov 4 13:27:59 hcompneu kernel: [ 1682.488000] INFO: task init:10873 blocked for more than 120 seconds. Nov 4 13:27:59 hcompneu kernel: [ 1682.488003] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 4 13:27:59 hcompneu kernel: [ 1682.488007] init D ffff88006fc54580 0 10873 10611 0x00000004 Nov 4 13:27:59 hcompneu kernel: [ 1682.488015] ffff880069b6fb60 0000000000000046 ffff880069b6ffd8 0000000000014580 Nov 4 13:27:59 hcompneu kernel: [ 1682.488022] ffff880069b6ffd8 0000000000014580 ffff88006a048000 ffffc90010554000 Nov 4 13:27:59 hcompneu kernel: [ 1682.488029] ffff88006a048000 ffffc900105540d8 ffff8800379a7800 ffffc90010554000 Nov 4 13:27:59 hcompneu kernel: [ 1682.488035] Call Trace: Nov 4 13:27:59 hcompneu kernel: [ 1682.488042] [<ffffffff816ea579>] schedule+0x29/0x70 Nov 4 13:27:59 hcompneu kernel: [ 1682.488060] [<ffffffffa0061263>] queue_log_writer+0x83/0xc0 [reiserfs] Nov 4 13:27:59 hcompneu kernel: [ 1682.488068] [<ffffffff81094950>] ? wake_up_state+0x20/0x20 Nov 4 13:27:59 hcompneu kernel: [ 1682.488086] [<ffffffffa0066d78>] do_journal_begin_r+0x208/0x3e0 [reiserfs] Nov 4 13:27:59 hcompneu kernel: [ 1682.488093] [<ffffffff811b9760>] ? poll_select_copy_remaining+0x130/0x130 Nov 4 13:27:59 hcompneu kernel: [ 1682.488111] [<ffffffffa006701a>] journal_begin+0x8a/0x160 [reiserfs] Nov 4 13:27:59 hcompneu kernel: [ 1682.488128] [<ffffffffa0054627>] reiserfs_dirty_inode+0x37/0xb0 [reiserfs] Nov 4 13:27:59 hcompneu kernel: [ 1682.488134] [<ffffffff811b9760>] ? poll_select_copy_remaining+0x130/0x130 Nov 4 13:27:59 hcompneu kernel: [ 1682.488143] [<ffffffff811cf7da>] __mark_inode_dirty+0x1ea/0x2f0 Nov 4 13:27:59 hcompneu kernel: [ 1682.488151] [<ffffffff811c071e>] update_time+0x8e/0xd0 Nov 4 13:27:59 hcompneu kernel: [ 1682.488158] [<ffffffff811c0920>] file_update_time+0x80/0xd0 Nov 4 13:27:59 hcompneu kernel: [ 1682.488165] [<ffffffff81140c00>] __generic_file_aio_write+0x180/0x3d0 Nov 4 13:27:59 hcompneu kernel: [ 1682.488172] [<ffffffff81140ead>] generic_file_aio_write+0x5d/0xc0 Nov 4 13:27:59 hcompneu kernel: [ 1682.488180] [<ffffffff811a6590>] do_sync_write+0x80/0xb0 Nov 4 13:27:59 hcompneu kernel: [ 1682.488188] [<ffffffff811a6ccd>] vfs_write+0xbd/0x1e0 Nov 4 13:27:59 hcompneu kernel: [ 1682.488195] [<ffffffff811a7709>] SyS_write+0x49/0xa0 Nov 4 13:27:59 hcompneu kernel: [ 1682.488202] [<ffffffff816f521d>] system_call_fastpath+0x1a/0x1f Nov 4 13:27:59 hcompneu kernel: [ 1682.488218] INFO: task plasma-desktop:11186 blocked for more than 120 seconds. Nov 4 13:27:59 hcompneu kernel: [ 1682.488221] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Nov 4 13:27:59 hcompneu kernel: [ 1682.488225] plasma-desktop D ffff88006fc54580 0 11186 10873 0x00000000 Nov 4 13:27:59 hcompneu kernel: [ 1682.488232] ffff88000c24db58 0000000000000046 ffff88000c24dfd8 0000000000014580 Nov 4 13:27:59 hcompneu kernel: [ 1682.488238] ffff88000c24dfd8 0000000000014580 ffff88006bd6aee0 ffffc90010554000 Nov 4 13:27:59 hcompneu kernel: [ 1682.488245] ffff88006bd6aee0 ffffc900105540d8 ffff8800379a7800 ffffc90010554000 Nov 4 13:27:59 hcompneu kernel: [ 1682.488252] Call Trace: Nov 4 13:27:59 hcompneu kernel: [ 1682.488258] [<ffffffff816ea579>] schedule+0x29/0x70 Nov 4 13:27:59 hcompneu kernel: [ 1682.488276] [<ffffffffa0061263>] queue_log_writer+0x83/0xc0 [reiserfs] Nov 4 13:27:59 hcompneu kernel: [ 1682.488284] [<ffffffff81094950>] ? wake_up_state+0x20/0x20 Nov 4 13:27:59 hcompneu kernel: [ 1682.488302] [<ffffffffa0066d78>] do_journal_begin_r+0x208/0x3e0 [reiserfs] Nov 4 13:27:59 hcompneu kernel: [ 1682.488310] [<ffffffff81011621>] ? __switch_to+0x181/0x4b0 Nov 4 13:27:59 hcompneu kernel: [ 1682.488328] [<ffffffffa006701a>] journal_begin+0x8a/0x160 [reiserfs] Nov 4 13:27:59 hcompneu kernel: [ 1682.488344] [<ffffffffa0054627>] reiserfs_dirty_inode+0x37/0xb0 [reiserfs] Nov 4 13:27:59 hcompneu kernel: [ 1682.488350] [<ffffffff816ea8a8>] ? io_schedule+0xc8/0x130 Nov 4 13:27:59 hcompneu kernel: [ 1682.488358] [<ffffffff811cf7da>] __mark_inode_dirty+0x1ea/0x2f0 Nov 4 13:27:59 hcompneu kernel: [ 1682.488365] [<ffffffff811c071e>] update_time+0x8e/0xd0 Nov 4 13:27:59 hcompneu kernel: [ 1682.488372] [<ffffffff811c0859>] touch_atime+0xf9/0x140 Nov 4 13:27:59 hcompneu kernel: [ 1682.488379] [<ffffffff81140778>] generic_file_aio_read+0x588/0x700 Nov 4 13:27:59 hcompneu kernel: [ 1682.488387] [<ffffffff811a64e0>] do_sync_read+0x80/0xb0 Nov 4 13:27:59 hcompneu kernel: [ 1682.488395] [<ffffffff811a6b3e>] vfs_read+0x9e/0x170 Nov 4 13:27:59 hcompneu kernel: [ 1682.488402] [<ffffffff811a7669>] SyS_read+0x49/0xa0 Nov 4 13:27:59 hcompneu kernel: [ 1682.488408] [<ffffffff816f521d>] system_call_fastpath+0x1a/0x1f Nov 4 13:28:07 hcompneu acpid: client 10462[0:0] has disconnected Nov 4 13:28:07 hcompneu acpid: client 10462[0:0] has disconnected Nov 4 13:28:07 hcompneu acpid: client connected from 11624[0:0] Nov 4 13:28:07 hcompneu acpid: 1 client rule loaded Nov 4 13:28:07 hcompneu acpid: client connected from 11624[0:0] Nov 4 13:28:07 hcompneu acpid: 1 client rule loaded ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: plasma-desktop 4:4.11.2-0ubuntu1 ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3 Uname: Linux 3.11.0-12-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.12.5-0ubuntu2.1 Architecture: amd64 Date: Mon Nov 4 13:54:35 2013 MarkForUpload: True SourcePackage: kde-workspace UpgradeStatus: Upgraded to saucy on 2013-11-03 (0 days ago) ** Affects: kde-workspace (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug saucy -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to kde-workspace in Ubuntu. https://bugs.launchpad.net/bugs/1247827 Title: plasma-desktop hang. with kernel callstack To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kde-workspace/+bug/1247827/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs