Extra info, because it may be connected - a few minutes after waking the system up from the successful suspension, info "task udisks-daemon:1305 blocked for more than 120 seconds" is logged. The message repeats every few (5, more less) minutes. It does not appear before suspending the system.
An example fragment of /var/log/syslog (the system was resumed from sleep at 15:52:50): Jul 15 15:56:42 laptop kernel: [ 7320.372044] INFO: task udisks-daemon:1305 blocked for more than 120 seconds. Jul 15 15:56:42 laptop kernel: [ 7320.372049] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Jul 15 15:56:42 laptop kernel: [ 7320.372052] udisks-daemon D 5ce0fba5 0 1305 1304 0x00000000 Jul 15 15:56:42 laptop kernel: [ 7320.372057] eca29c48 00000086 00000672 5ce0fba5 00000672 edbd71d4 eca1ce4c c183a8c0 Jul 15 15:56:42 laptop kernel: [ 7320.372064] 5d145a23 00000672 eca1ce48 c183a8c0 c183a8c0 f70068c0 eca1cbc0 f2ac3280 Jul 15 15:56:42 laptop kernel: [ 7320.372071] eca1cbc0 eca29c24 c1001ed1 00000000 00000000 eca1cebc 00000000 eca29c2c Jul 15 15:56:42 laptop kernel: [ 7320.372079] Call Trace: Jul 15 15:56:42 laptop kernel: [ 7320.372090] [<c1001ed1>] ? __switch_to+0xe1/0x190 Jul 15 15:56:42 laptop kernel: [ 7320.372096] [<c103f9f9>] ? finish_task_switch+0x39/0xc0 Jul 15 15:56:42 laptop kernel: [ 7320.372102] [<c1507bfd>] ? schedule+0x3ad/0x740 Jul 15 15:56:42 laptop kernel: [ 7320.372106] [<c1038502>] ? resched_task+0x22/0x70 Jul 15 15:56:42 laptop kernel: [ 7320.372109] [<c15085cd>] schedule_timeout+0x1ed/0x260 Jul 15 15:56:42 laptop kernel: [ 7320.372114] [<c1049f53>] ? try_to_wake_up+0x223/0x3c0 Jul 15 15:56:42 laptop kernel: [ 7320.372117] [<c1508150>] wait_for_common+0xa0/0x130 Jul 15 15:56:42 laptop kernel: [ 7320.372121] [<c104a0f0>] ? default_wake_function+0x0/0x20 Jul 15 15:56:42 laptop kernel: [ 7320.372125] [<c15082b7>] wait_for_completion+0x17/0x20 Jul 15 15:56:42 laptop kernel: [ 7320.372130] [<c1068100>] flush_work+0x30/0x40 Jul 15 15:56:42 laptop kernel: [ 7320.372133] [<c10666d0>] ? wq_barrier_func+0x0/0x20 Jul 15 15:56:42 laptop kernel: [ 7320.372137] [<c10697eb>] flush_delayed_work+0x3b/0x40 Jul 15 15:56:42 laptop kernel: [ 7320.372141] [<c12653a5>] disk_clear_events+0x75/0x120 Jul 15 15:56:42 laptop kernel: [ 7320.372146] [<c1153b7d>] check_disk_change+0x2d/0x70 Jul 15 15:56:42 laptop kernel: [ 7320.372151] [<c139cb80>] cdrom_open+0x30/0x1c0 Jul 15 15:56:42 laptop kernel: [ 7320.372155] [<c1273012>] ? kobject_get+0x12/0x20 Jul 15 15:56:42 laptop kernel: [ 7320.372159] [<c1263b78>] ? get_disk+0x48/0xa0 Jul 15 15:56:42 laptop kernel: [ 7320.372163] [<c1273012>] ? kobject_get+0x12/0x20 Jul 15 15:56:42 laptop kernel: [ 7320.372167] [<c1330c08>] ? get_device+0x18/0x20 Jul 15 15:56:42 laptop kernel: [ 7320.372171] [<c1351b23>] ? scsi_device_get+0x43/0xa0 Jul 15 15:56:42 laptop kernel: [ 7320.372176] [<c1367fa7>] sr_block_open+0x67/0xb0 Jul 15 15:56:42 laptop kernel: [ 7320.372180] [<c1154e3e>] __blkdev_get+0x8e/0x330 Jul 15 15:56:42 laptop kernel: [ 7320.372183] [<c11551cf>] blkdev_get+0xef/0x230 Jul 15 15:56:42 laptop kernel: [ 7320.372186] [<c1155368>] blkdev_open+0x58/0x70 Jul 15 15:56:42 laptop kernel: [ 7320.372190] [<c1125361>] __dentry_open+0xc1/0x280 Jul 15 15:56:42 laptop kernel: [ 7320.372193] [<c11266ce>] nameidata_to_filp+0x6e/0x80 Jul 15 15:56:42 laptop kernel: [ 7320.372196] [<c1155310>] ? blkdev_open+0x0/0x70 Jul 15 15:56:42 laptop kernel: [ 7320.372200] [<c1133b7f>] finish_open+0xaf/0x1a0 Jul 15 15:56:42 laptop kernel: [ 7320.372203] [<c1133428>] ? do_path_lookup+0x68/0x120 Jul 15 15:56:42 laptop kernel: [ 7320.372207] [<c11341c7>] do_filp_open+0x207/0x6e0 Jul 15 15:56:42 laptop kernel: [ 7320.372210] [<c1351ad7>] ? scsi_device_put+0x47/0x50 Jul 15 15:56:42 laptop kernel: [ 7320.372225] [<c1002a31>] ? do_signal+0x61/0x120 Jul 15 15:56:42 laptop kernel: [ 7320.372229] [<c113fee9>] ? vfsmount_lock_local_unlock+0x19/0x20 Jul 15 15:56:42 laptop kernel: [ 7320.372233] [<c1126736>] do_sys_open+0x56/0x120 Jul 15 15:56:42 laptop kernel: [ 7320.372236] [<c112682e>] sys_open+0x2e/0x40 Jul 15 15:56:42 laptop kernel: [ 7320.372240] [<c150a194>] syscall_call+0x7/0xb Jul 15 15:56:42 laptop kernel: [ 7320.372243] [<c1500000>] ? detect_ht+0x14f/0x16d -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/810686 Title: udisks-daemon prevents system from suspending or hibernating To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/udisks/+bug/810686/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
