Just updated Kubuntu 9.10 (64-bit) to latest kernel 2.6.31-17-generic , now K3B just burns around half the disk and the DVD R/W drive drops out totally, not even visible in Dolphin. The drive is brand new Pioneer IDE, just before the upgrade it was working fine. Log file extract below 2010-03-05 21:59:26 Kubuntu64 kernel [ 363.971865] Disabling IRQ #23 2010-03-05 22:09:01 Kubuntu64 CRON[2534] (root) CMD ( [ -x /usr/lib/php5/maxlifetime ] && [ -d /var/lib/php5 ] && find /var/lib/php5/ -type f -cmin +$(/usr/lib/php5/maxlifetime) -print0 | xargs -n 200 -r -0 rm) 2010-03-05 22:09:21 Kubuntu64 kernel [ 959.012539] ata5: lost interrupt (Status 0x50) 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682553] INFO: task hald-addon-stor:1450 blocked for more than 120 seconds. 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682562] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682568] hald-addon-st D 0000000000000000 0 1450 1100 0x00000000 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682579] ffff880061cf3c28 0000000000000082 ffffffff81130180 0000000000015880 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682588] ffff8800648b03b0 0000000000015880 0000000000015880 0000000000015880 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682596] 0000000000015880 ffff8800648b03b0 0000000000015880 0000000000015880 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682604] Call Trace: 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682620] [] ? __pollwait+0x0/0xf0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682632] [] __mutex_lock_slowpath+0xd7/0x160 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682642] [] ? blkdev_open+0x0/0xc0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682649] [] mutex_lock+0x26/0x50 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682656] [] __blkdev_get+0x38/0x3a0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682663] [] ? blkdev_open+0x0/0xc0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682670] [] blkdev_get+0xb/0x10 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682676] [] blkdev_open+0x6c/0xc0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682685] [] __dentry_open+0xe6/0x2e0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682692] [] nameidata_to_filp+0x57/0x70 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682701] [] do_filp_open+0x2ca/0xac0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682708] [] ? iput+0x2b/0x70 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682716] [] ? mntput_no_expire+0x2b/0x100 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682725] [] ? __strncpy_from_user+0x22/0x60 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682732] [] ? alloc_fd+0x102/0x150 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682740] [] do_sys_open+0x64/0x160 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682747] [] sys_open+0x1b/0x20 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682757] [] system_call_fastpath+0x16/0x1b 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682763] INFO: task hald-addon-stor:1451 blocked for more than 120 seconds. 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682767] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682771] hald-addon-st D 0000000000000000 0 1451 1100 0x00000000 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682780] ffff880061cdd7d8 0000000000000082 ffff880061cdd778 0000000000015880 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682788] ffff8800648b1a60 0000000000015880 0000000000015880 0000000000015880 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682795] 0000000000015880 ffff8800648b1a60 0000000000015880 0000000000015880 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682803] Call Trace: 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682810] [] schedule_timeout+0x1d5/0x230 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682820] [] ? default_spin_lock_flags+0x9/0x10 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682827] [] wait_for_common+0xd5/0x170 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682836] [] ? default_wake_function+0x0/0x10 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682847] [] ? __generic_unplug_device+0x2d/0x40 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682855] [] wait_for_completion+0x18/0x20 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682863] [] blk_execute_rq+0x87/0xe0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682870] [] ? default_spin_lock_flags+0x9/0x10 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682878] [] ? _spin_lock_irqsave+0x2a/0x40 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682885] [] ? blk_get_request+0x6c/0xa0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682893] [] scsi_execute+0xf7/0x160 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682899] [] scsi_execute_req+0xa7/0x180 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682907] [] sr_test_unit_ready+0x66/0xf0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682913] [] ? sr_media_change+0x61/0x1a0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682920] [] sr_media_change+0x88/0x1a0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682925] [] ? free_poll_entry+0x21/0x30 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682935] [] media_changed+0x68/0xb0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682943] [] cdrom_media_changed+0x37/0x40 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682949] [] sr_block_media_changed+0x14/0x20 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682956] [] check_disk_change+0x2e/0x70 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682964] [] cdrom_open+0x118/0x200 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682972] [] ? get_disk+0x49/0x80 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682980] [] ? kobject_get+0x1a/0x30 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682987] [] sr_block_open+0x74/0xd0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.682993] [] ? kobject_put+0x27/0x60 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683000] [] ? blkdev_open+0x0/0xc0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683006] [] __blkdev_get+0x20e/0x3a0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683013] [] ? blkdev_open+0x0/0xc0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683020] [] blkdev_get+0xb/0x10 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683026] [] blkdev_open+0x6c/0xc0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683033] [] __dentry_open+0xe6/0x2e0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683041] [] nameidata_to_filp+0x57/0x70 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683048] [] do_filp_open+0x2ca/0xac0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683055] [] ? _spin_lock+0x9/0x10 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683065] [] ? free_pages_and_swap_cache+0xb1/0xe0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683072] [] ? unmap_region+0x148/0x160 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683079] [] ? __strncpy_from_user+0x22/0x60 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683086] [] ? alloc_fd+0x102/0x150 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683093] [] do_sys_open+0x64/0x160 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683100] [] sys_open+0x1b/0x20 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683107] [] system_call_fastpath+0x16/0x1b 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683126] INFO: task k3b:2408 blocked for more than 120 seconds. 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683130] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683135] k3b D 0000000000000000 0 2408 1 0x00000000 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683143] ffff88005296d7d8 0000000000000082 ffff88005296d778 0000000000015880 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683151] ffff88007ada3110 0000000000015880 0000000000015880 0000000000015880 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683158] 0000000000015880 ffff88007ada3110 0000000000015880 0000000000015880 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683166] Call Trace: 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683173] [] schedule_timeout+0x1d5/0x230 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683181] [] ? mod_timer+0x103/0x160 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683189] [] wait_for_common+0xd5/0x170 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683195] [] ? default_wake_function+0x0/0x10 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683204] [] ? __generic_unplug_device+0x2d/0x40 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683211] [] wait_for_completion+0x18/0x20 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683218] [] blk_execute_rq+0x87/0xe0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683224] [] ? blk_get_request+0x6c/0xa0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683230] [] scsi_execute+0xf7/0x160 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683237] [] scsi_execute_req+0xa7/0x180 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683243] [] sr_test_unit_ready+0x66/0xf0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683250] [] ? sr_media_change+0x61/0x1a0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683256] [] sr_media_change+0x88/0x1a0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683262] [] ? default_wake_function+0x0/0x10 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683270] [] media_changed+0x68/0xb0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683277] [] cdrom_media_changed+0x37/0x40 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683284] [] sr_block_media_changed+0x14/0x20 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683290] [] check_disk_change+0x2e/0x70 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683297] [] cdrom_open+0x118/0x200 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683304] [] ? get_disk+0x49/0x80 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683312] [] ? shmem_get_acl+0x4c/0xa0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683319] [] ? kobject_get+0x1a/0x30 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683325] [] sr_block_open+0x74/0xd0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683334] [] ? get_device+0x14/0x20 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683341] [] ? blkdev_open+0x0/0xc0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683347] [] __blkdev_get+0x97/0x3a0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683354] [] ? blkdev_open+0x0/0xc0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683360] [] blkdev_get+0xb/0x10 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683367] [] blkdev_open+0x6c/0xc0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683374] [] __dentry_open+0xe6/0x2e0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683381] [] nameidata_to_filp+0x57/0x70 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683389] [] do_filp_open+0x2ca/0xac0 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683397] [] ? __strncpy_from_user+0x22/0x60 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683404] [] ? alloc_fd+0x102/0x150 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683411] [] do_sys_open+0x64/0x160 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683418] [] sys_open+0x1b/0x20 2010-03-05 22:09:23 Kubuntu64 kernel [ 960.683425] [] system_call_fastpath+0x16/0x1b 2010-03-05 22:09:52 Kubuntu64 kernel [ 990.012537] ata5: lost interrupt (Status 0x51) 2010-03-05 22:09:57 Kubuntu64 kernel [ 995.012549] ata5.00: qc timeout (cmd 0xa0) 2010-03-05 22:09:57 Kubuntu64 kernel [ 995.012570] ata5.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen 2010-03-05 22:09:57 Kubuntu64 kernel [ 995.012593] ata5.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0 2010-03-05 22:09:57 Kubuntu64 kernel [ 995.012596] cdb 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 2010-03-05 22:09:57 Kubuntu64 kernel [ 995.012598] res 51/20:03:00:00:00/00:00:00:00:00/a0 Emask 0x5 (timeout) 2010-03-05 22:09:57 Kubuntu64 kernel [ 995.012606] ata5.00: status: { DRDY ERR } 2010-03-05 22:09:57 Kubuntu64 kernel [ 995.012639] ata5: soft resetting link 2010-03-05 22:09:58 Kubuntu64 kernel [ 995.253270] ata5.00: configured for UDMA/33 2010-03-05 22:09:58 Kubuntu64 kernel [ 995.292840] ata5.01: configured for UDMA/33 2010-03-05 22:10:03 Kubuntu64 kernel [ 1000.292548] ata5.00: qc timeout (cmd 0xa0) 2010-03-05 22:10:03 Kubuntu64 kernel [ 1000.292562] ata5.00: TEST_UNIT_READY failed (err_mask=0x5) 2010-03-05 22:10:03 Kubuntu64 kernel [ 1000.292597] ata5: soft resetting link 2010-03-05 22:10:03 Kubuntu64 kernel [ 1000.512863] ata5.00: configured for UDMA/33 2010-03-05 22:10:03 Kubuntu64 kernel [ 1000.552818] ata5.01: configured for UDMA/33 2010-03-05 22:10:08 Kubuntu64 kernel [ 1005.552548] ata5.00: qc timeout (cmd 0xa0) 2010-03-05 22:10:08 Kubuntu64 kernel [ 1005.552561] ata5.00: TEST_UNIT_READY failed (err_mask=0x5) 2010-03-05 22:10:08 Kubuntu64 kernel [ 1005.552571] ata5.00: limiting speed to UDMA/33:PIO3 2010-03-05 22:10:08 Kubuntu64 kernel [ 1005.552605] ata5: soft resetting link 2010-03-05 22:10:08 Kubuntu64 kernel [ 1005.792881] ata5.00: configured for UDMA/33 2010-03-05 22:10:08 Kubuntu64 kernel [ 1005.834338] ata5.01: configured for UDMA/33 2010-03-05 22:10:13 Kubuntu64 kernel [ 1010.834665] ata5.00: qc timeout (cmd 0xa0) 2010-03-05 22:10:13 Kubuntu64 kernel [ 1010.834679] ata5.00: TEST_UNIT_READY failed (err_mask=0x5) 2010-03-05 22:10:13 Kubuntu64 kernel [ 1010.834686] ata5.00: disabled 2010-03-05 22:10:13 Kubuntu64 kernel [ 1010.834709] ata5.01: TEST_UNIT_READY failed (err_mask=0x40) 2010-03-05 22:10:13 Kubuntu64 kernel [ 1010.834737] ata5: soft resetting link 2010-03-05 22:10:13 Kubuntu64 kernel [ 1011.052832] ata5.01: configured for UDMA/33 2010-03-05 22:10:18 Kubuntu64 kernel [ 1016.052546] ata5.01: qc timeout (cmd 0xa0) 2010-03-05 22:10:18 Kubuntu64 kernel [ 1016.052559] ata5.01: TEST_UNIT_READY failed (err_mask=0x5) 2010-03-05 22:10:18 Kubuntu64 kernel [ 1016.052568] ata5.01: limiting speed to UDMA/33:PIO3 2010-03-05 22:10:18 Kubuntu64 kernel [ 1016.052601] ata5: soft resetting link 2010-03-05 22:10:19 Kubuntu64 kernel [ 1016.272836] ata5.01: configured for UDMA/33 2010-03-05 22:10:24 Kubuntu64 kernel [ 1021.272548] ata5.01: qc timeout (cmd 0xa0) 2010-03-05 22:10:24 Kubuntu64 kernel [ 1021.272561] ata5.01: TEST_UNIT_READY failed (err_mask=0x5) 2010-03-05 22:10:24 Kubuntu64 kernel [ 1021.272568] ata5.01: disabled 2010-03-05 22:10:24 Kubuntu64 kernel [ 1021.272625] ata5: soft resetting link 2010-03-05 22:10:24 Kubuntu64 kernel [ 1021.433212] ata5: EH complete