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Hi there! I'm having a frustrating problem where my system will hang periodically (10-20 times a day, sometimes). It becomes unresponsive and I have to do a reboot. Inspecting journalctl -b -1 shows that the last thing to happen is usually something to do with lirc:
Mar 10 20:49:50 homura kernel: usb 2-1.5: USB disconnect, device number 3
Mar 10 20:49:50 homura kernel: streamzap 2-1.5:1.0: urb terminated, status: -108
Mar 10 20:49:51 homura lircd-0.9.2a[574]: error reading from /dev/lirc0 (ret -1, expected 4): No such device
Mar 10 20:49:51 homura lircd[574]: lircd-0.9.2a[574]: error reading from /dev/lirc0 (ret -1, expected 4): No such device
Mar 10 20:49:51 homura systemd-udevd[297]: error opening USB device 'descriptors' file
Mar 10 20:49:51 homura kernel: usb 2-1.5: new low-speed USB device number 5 using ehci-pci
Mar 10 20:49:51 homura mtp-probe[30618]: checking bus 2, device 5: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5"
Mar 10 20:49:51 homura mtp-probe[30618]: bus: 2, device: 5 was not an MTP device
Mar 10 20:49:51 homura kernel: Registered IR keymap rc-streamzap
Mar 10 20:49:51 homura kernel: input: Streamzap PC Remote Infrared Receiver (0e9c:0000) as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.0/rc/rc0/input31
Mar 10 20:49:51 homura kernel: rc0: Streamzap PC Remote Infrared Receiver (0e9c:0000) as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.5/2-1.5:1.0/rc/rc0
Mar 10 20:49:51 homura kernel: input: MCE IR Keyboard/Mouse (streamzap) as /devices/virtual/input/input32
Mar 10 20:49:51 homura kernel: rc rc0: lirc_dev: driver ir-lirc-codec (streamzap) registered at minor = 0
Mar 10 20:49:51 homura kernel: streamzap 2-1.5:1.0: Registered Streamzap, Inc. Streamzap Remote Control on usb2:5Sometimes an oops is logged, too:
Mar 09 19:21:08 homura kernel: general protection fault: 0000 [#1] PREEMPT SMP
Mar 09 19:21:08 homura kernel: Modules linked in: fuse rpcsec_gss_krb5 nfsv4 dns_resolver nct6775 hwmon_vid cfg80211 snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic iTCO_wdt iTCO_vend
Mar 09 19:21:08 homura kernel: snd_hwdep button snd_pcm video e1000e drm_kms_helper snd_timer snd intel_gtt i2c_algo_bit soundcore mei_me ie31200_edac mei ptp edac_core pps_core shpchp processor nf
Mar 09 19:21:08 homura kernel: CPU: 1 PID: 17768 Comm: CHTTPCacheIniti Tainted: P O 3.18.6-1-ARCH #1
Mar 09 19:21:08 homura kernel: Hardware name: System manufacturer System Product Name/SABERTOOTH Z77, BIOS 1805 12/19/2012
Mar 09 19:21:08 homura kernel: task: ffff88009fa4e4a0 ti: ffff880389e30000 task.ti: ffff880389e30000
Mar 09 19:21:08 homura kernel: RIP: 0010:[<ffffffff811b2c26>] [<ffffffff811b2c26>] __kmalloc+0x86/0x1c0
Mar 09 19:21:08 homura kernel: RSP: 0018:ffff880389e33bc8 EFLAGS: 00010286
Mar 09 19:21:08 homura kernel: RAX: 0000000000000000 RBX: ffff88019e62dcc0 RCX: 00000000023d7301
Mar 09 19:21:08 homura kernel: RDX: 00000000023d7281 RSI: ffff88042fa564a0 RDI: ffffffff811e868e
Mar 09 19:21:08 homura kernel: RBP: ffff880389e33c08 R08: 00000000000164a0 R09: 0000000000000000
Mar 09 19:21:08 homura kernel: R10: 8080808080808080 R11: fefefefefefefeff R12: c3f000eef3f000ee
Mar 09 19:21:08 homura kernel: R13: 0000000000000062 R14: 00000000000000d0 R15: ffff88041f403900
Mar 09 19:21:08 homura kernel: FS: 0000000000000000(0000) GS:ffff88042fa40000(0063) knlGS:00000000ec5ffb40
Mar 09 19:21:08 homura kernel: CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
Mar 09 19:21:08 homura kernel: CR2: 00000000ec32f000 CR3: 000000037255c000 CR4: 00000000001407e0
Mar 09 19:21:08 homura kernel: Stack:
Mar 09 19:21:08 homura kernel: ffff880389e33bf8 ffffffff811e8569 ffff880389e33c38 ffff88019e62dcc0
Mar 09 19:21:08 homura kernel: ffff880418f77800 ffff880389e33e28 ffff880389e33ccf 0000000000000001
Mar 09 19:21:08 homura kernel: ffff880389e33c38 ffffffff811e868e ffff880389e33e28 ffff8801a3a2ccc0
Mar 09 19:21:08 homura kernel: Call Trace:
Mar 09 19:21:08 homura kernel: [<ffffffff811e8569>] ? __d_alloc+0x29/0x190
Mar 09 19:21:08 homura kernel: [<ffffffff811e868e>] __d_alloc+0x14e/0x190
Mar 09 19:21:08 homura kernel: [<ffffffff811e86ee>] d_alloc+0x1e/0x90
Mar 09 19:21:08 homura kernel: [<ffffffff811d9a33>] lookup_dcache+0x83/0xb0
Mar 09 19:21:08 homura kernel: [<ffffffff811d8d5b>] ? path_get+0x2b/0x40
Mar 09 19:21:08 homura kernel: [<ffffffff811d9a8d>] __lookup_hash+0x2d/0x60
Mar 09 19:21:08 homura kernel: [<ffffffff811dbbe3>] lookup_slow+0x43/0xc0
Mar 09 19:21:08 homura kernel: [<ffffffff811dcd02>] path_lookupat+0x6f2/0x850
Mar 09 19:21:08 homura kernel: [<ffffffff811df406>] ? final_putname+0x26/0x50
Mar 09 19:21:08 homura kernel: [<ffffffff811df460>] ? getname_flags+0x30/0x130
Mar 09 19:21:08 homura kernel: [<ffffffff811dd356>] filename_lookup.isra.27+0x26/0x80
Mar 09 19:21:08 homura kernel: [<ffffffff811dfe93>] user_path_at_empty+0x63/0xd0
Mar 09 19:21:08 homura kernel: [<ffffffff811d4437>] ? vfs_fstatat+0x87/0xd0
Mar 09 19:21:08 homura kernel: [<ffffffff81092bf6>] ? prepare_creds+0x26/0x100
Mar 09 19:21:08 homura kernel: [<ffffffff811dff11>] user_path_at+0x11/0x20
Mar 09 19:21:08 homura kernel: [<ffffffff811cd912>] SyS_faccessat+0xb2/0x240
Mar 09 19:21:08 homura kernel: [<ffffffff811cdab8>] SyS_access+0x18/0x20
Mar 09 19:21:08 homura kernel: [<ffffffff81557cf6>] sysenter_dispatch+0x7/0x25
Mar 09 19:21:08 homura kernel: Code: 20 b8 00 00 74 77 4c 8b 26 4d 85 e4 0f 84 e3 00 00 00 48 83 7e 10 00 0f 84 d8 00 00 00 49 63 47 20 48 8d 8a 80 00 00 00 4d 8b 07 <49> 8b 1c 04 4c 89 e0 65 49 0f
Mar 09 19:21:08 homura kernel: RIP [<ffffffff811b2c26>] __kmalloc+0x86/0x1c0
Mar 09 19:21:08 homura kernel: RSP <ffff880389e33bc8>
Mar 09 19:21:08 homura kernel: ---[ end trace 29e2ce086f5ceb23 ]---
Mar 09 19:21:08 homura kernel: general protection fault: 0000 [#2] PREEMPT SMP
Mar 09 19:21:08 homura kernel: Modules linked in: fuse rpcsec_gss_krb5 nfsv4 dns_resolver nct6775 hwmon_vid cfg80211 snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic iTCO_wdt iTCO_vend
Mar 09 19:21:08 homura kernel: snd_hwdep button snd_pcm video e1000e drm_kms_helper snd_timer snd intel_gtt i2c_algo_bit soundcore mei_me ie31200_edac mei ptp edac_core pps_core shpchp processor nf
Mar 09 19:21:08 homura kernel: CPU: 1 PID: 210 Comm: kworker/1:1H Tainted: P D O 3.18.6-1-ARCH #1
Mar 09 19:21:08 homura kernel: Hardware name: System manufacturer System Product Name/SABERTOOTH Z77, BIOS 1805 12/19/2012
Mar 09 19:21:08 homura kernel: Workqueue: kblockd cfq_kick_queue
Mar 09 19:21:08 homura kernel: task: ffff880419775080 ti: ffff8804171e0000 task.ti: ffff8804171e0000
Mar 09 19:21:08 homura kernel: RIP: 0010:[<ffffffff811b2a9b>] [<ffffffff811b2a9b>] kmem_cache_alloc+0x6b/0x170
Mar 09 19:21:08 homura kernel: RSP: 0018:ffff8804171e3c18 EFLAGS: 00010086
Mar 09 19:21:08 homura kernel: RAX: 0000000000000000 RBX: ffffffffa094f080 RCX: 00000000023d7301
Mar 09 19:21:08 homura kernel: RDX: 00000000023d7281 RSI: 0000000000000020 RDI: ffffffffa093204f
Mar 09 19:21:08 homura kernel: RBP: ffff8804171e3c58 R08: 00000000000164a0 R09: ffff8803b4d3dc80
Mar 09 19:21:08 homura kernel: R10: 000000000000002f R11: 000000000000002f R12: c3f000eef3f000ee
Mar 09 19:21:08 homura kernel: R13: 0000000000000020 R14: ffff8800bbb3e000 R15: ffff88041f403900
Mar 09 19:21:08 homura kernel: FS: 0000000000000000(0000) GS:ffff88042fa40000(0000) knlGS:0000000000000000
Mar 09 19:21:08 homura kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Mar 09 19:21:08 homura kernel: CR2: 00000000ec32f000 CR3: 000000037255c000 CR4: 00000000001407e0
Mar 09 19:21:08 homura kernel: Stack:
Mar 09 19:21:08 homura kernel: ffff8804171e3c80 ffffffffa0932034 ffff8804171e3c58 ffffffffa094f080
Mar 09 19:21:08 homura kernel: ffff8803b4d3dc80 0000000000000020 ffff8800bbb3e000 ffff88042fa58400
Mar 09 19:21:08 homura kernel: ffff8804171e3c98 ffffffffa093204f ffff8804171e3c98 ffff8803e89c1e30
Mar 09 19:21:08 homura kernel: Call Trace:
Mar 09 19:21:08 homura kernel: [<ffffffffa0932034>] ? scsi_host_alloc_command+0x34/0xd0 [scsi_mod]
Mar 09 19:21:08 homura kernel: [<ffffffffa093204f>] scsi_host_alloc_command+0x4f/0xd0 [scsi_mod]
Mar 09 19:21:08 homura kernel: [<ffffffffa0932ba4>] scsi_get_command+0x24/0x180 [scsi_mod]
Mar 09 19:21:08 homura kernel: [<ffffffffa093af45>] scsi_prep_fn+0x165/0x180 [scsi_mod]
Mar 09 19:21:08 homura kernel: [<ffffffff81287dd3>] blk_peek_request+0x173/0x2c0
Mar 09 19:21:08 homura kernel: [<ffffffffa093bb08>] scsi_request_fn+0x48/0x5e0 [scsi_mod]
Mar 09 19:21:08 homura kernel: [<ffffffff81284345>] ? blk_run_queue+0x35/0x40
Mar 09 19:21:08 homura kernel: [<ffffffff81284007>] __blk_run_queue+0x37/0x50
Mar 09 19:21:08 homura kernel: [<ffffffff812aad4f>] cfq_kick_queue+0x2f/0x40
Mar 09 19:21:08 homura kernel: [<ffffffff8108b845>] process_one_work+0x145/0x400
Mar 09 19:21:08 homura kernel: [<ffffffff8108be0b>] worker_thread+0x6b/0x480
Mar 09 19:21:08 homura kernel: [<ffffffff8108bda0>] ? init_pwq.part.22+0x10/0x10
Mar 09 19:21:08 homura kernel: [<ffffffff81090e6a>] kthread+0xea/0x100
Mar 09 19:21:08 homura kernel: [<ffffffff81090d80>] ? kthread_create_on_node+0x1c0/0x1c0
Mar 09 19:21:08 homura kernel: [<ffffffff8155563c>] ret_from_fork+0x7c/0xb0
Mar 09 19:21:08 homura kernel: [<ffffffff81090d80>] ? kthread_create_on_node+0x1c0/0x1c0
Mar 09 19:21:08 homura kernel: Code: 0f 84 ca 00 00 00 4c 8b 20 4d 85 e4 0f 84 de 00 00 00 48 83 78 10 00 0f 84 d3 00 00 00 49 63 47 20 48 8d 8a 80 00 00 00 4d 8b 07 <49> 8b 1c 04 4c 89 e0 65 49 0f
Mar 09 19:21:08 homura kernel: RIP [<ffffffff811b2a9b>] kmem_cache_alloc+0x6b/0x170
Mar 09 19:21:08 homura kernel: RSP <ffff8804171e3c18>
Mar 09 19:21:08 homura kernel: ---[ end trace 29e2ce086f5ceb24 ]---
Mar 09 19:21:08 homura kernel: note: kworker/1:1H[210] exited with preempt_count 1
Mar 09 19:21:08 homura kernel: BUG: unable to handle kernel paging request at ffffffffffffffd8
Mar 09 19:21:08 homura kernel: IP: [<ffffffff81091530>] kthread_data+0x10/0x20
Mar 09 19:21:08 homura kernel: PGD 2814067 PUD 2816067 PMD 0
Mar 09 19:21:08 homura kernel: Oops: 0000 [#3] PREEMPT SMP
Mar 09 19:21:08 homura kernel: Modules linked in: fuse rpcsec_gss_krb5 nfsv4 dns_resolver nct6775 hwmon_vid cfg80211 snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic iTCO_wdt iTCO_vend
Mar 09 19:21:08 homura kernel: snd_hwdep button snd_pcm video e1000e drm_kms_helper snd_timer snd intel_gtt i2c_algo_bit soundcore mei_me ie31200_edac mei ptp edac_core pps_core shpchp processor nf
Mar 09 19:21:08 homura kernel: CPU: 1 PID: 210 Comm: kworker/1:1H Tainted: P D O 3.18.6-1-ARCH #1
Mar 09 19:21:08 homura kernel: Hardware name: System manufacturer System Product Name/SABERTOOTH Z77, BIOS 1805 12/19/2012
Mar 09 19:21:08 homura kernel: task: ffff880419775080 ti: ffff8804171e0000 task.ti: ffff8804171e0000
Mar 09 19:21:08 homura kernel: RIP: 0010:[<ffffffff81091530>] [<ffffffff81091530>] kthread_data+0x10/0x20
Mar 09 19:21:08 homura kernel: RSP: 0018:ffff8804171e38e8 EFLAGS: 00010092
Mar 09 19:21:08 homura kernel: RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
Mar 09 19:21:08 homura kernel: RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff880419775080
Mar 09 19:21:08 homura kernel: RBP: ffff8804171e38e8 R08: 0000000000000000 R09: ffff8804197750e8
Mar 09 19:21:08 homura kernel: R10: 000000000000218f R11: ffffea00105ee800 R12: ffff88042fa53640
Mar 09 19:21:08 homura kernel: R13: ffff88042fa53640 R14: ffff880419775080 R15: 0000000000000000
Mar 09 19:21:08 homura kernel: FS: 0000000000000000(0000) GS:ffff88042fa40000(0000) knlGS:0000000000000000
Mar 09 19:21:08 homura kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
Mar 09 19:21:08 homura kernel: CR2: 0000000000000028 CR3: 000000037255c000 CR4: 00000000001407e0
Mar 09 19:21:08 homura kernel: Stack:
Mar 09 19:21:08 homura kernel: ffff8804171e3908 ffffffff8108c2a5 ffff8804171e3908 0000000000000001
Mar 09 19:21:08 homura kernel: ffff8804171e3a28 ffffffff81551285 ffff880419775080 0000000000013640
Mar 09 19:21:08 homura kernel: ffff8804171e3fd8 0000000000013640 ffff8804171e3980 ffff880419775080
Mar 09 19:21:08 homura kernel: Call Trace:
Mar 09 19:21:08 homura kernel: [<ffffffff8108c2a5>] wq_worker_sleeping+0x15/0xa0
Mar 09 19:21:08 homura kernel: [<ffffffff81551285>] __schedule+0x765/0xa50
Mar 09 19:21:08 homura kernel: [<ffffffff810d4417>] ? call_rcu+0x17/0x20
Mar 09 19:21:08 homura kernel: [<ffffffff81073f3f>] ? release_task+0x39f/0x4c0
Mar 09 19:21:08 homura kernel: [<ffffffff81551599>] schedule+0x29/0x70
Mar 09 19:21:08 homura kernel: [<ffffffff81075a62>] do_exit+0x882/0xb30
Mar 09 19:21:08 homura kernel: [<ffffffff810187ff>] oops_end+0x9f/0xe0
Mar 09 19:21:08 homura kernel: [<ffffffff81018cfb>] die+0x4b/0x70
Mar 09 19:21:08 homura kernel: [<ffffffff810152fa>] do_general_protection+0xda/0x160
Mar 09 19:21:08 homura kernel: [<ffffffff81557538>] general_protection+0x28/0x30
Mar 09 19:21:08 homura kernel: [<ffffffffa093204f>] ? scsi_host_alloc_command+0x4f/0xd0 [scsi_mod]
Mar 09 19:21:08 homura kernel: [<ffffffff811b2a9b>] ? kmem_cache_alloc+0x6b/0x170
Mar 09 19:21:08 homura kernel: [<ffffffff811b2b9a>] ? kmem_cache_alloc+0x16a/0x170
Mar 09 19:21:08 homura kernel: [<ffffffffa0932034>] ? scsi_host_alloc_command+0x34/0xd0 [scsi_mod]
Mar 09 19:21:08 homura kernel: [<ffffffffa093204f>] scsi_host_alloc_command+0x4f/0xd0 [scsi_mod]
Mar 09 19:21:08 homura kernel: [<ffffffffa0932ba4>] scsi_get_command+0x24/0x180 [scsi_mod]
Mar 09 19:21:08 homura kernel: [<ffffffffa093af45>] scsi_prep_fn+0x165/0x180 [scsi_mod]
Mar 09 19:21:08 homura kernel: [<ffffffff81287dd3>] blk_peek_request+0x173/0x2c0
Mar 09 19:21:08 homura kernel: [<ffffffffa093bb08>] scsi_request_fn+0x48/0x5e0 [scsi_mod]
Mar 09 19:21:08 homura kernel: [<ffffffff81284345>] ? blk_run_queue+0x35/0x40
Mar 09 19:21:08 homura kernel: [<ffffffff81284007>] __blk_run_queue+0x37/0x50
Mar 09 19:21:08 homura kernel: [<ffffffff812aad4f>] cfq_kick_queue+0x2f/0x40
Mar 09 19:21:08 homura kernel: [<ffffffff8108b845>] process_one_work+0x145/0x400
Mar 09 19:21:08 homura kernel: [<ffffffff8108be0b>] worker_thread+0x6b/0x480
Mar 09 19:21:08 homura kernel: [<ffffffff8108bda0>] ? init_pwq.part.22+0x10/0x10
Mar 09 19:21:08 homura kernel: [<ffffffff81090e6a>] kthread+0xea/0x100
Mar 09 19:21:08 homura kernel: [<ffffffff81090d80>] ? kthread_create_on_node+0x1c0/0x1c0
Mar 09 19:21:08 homura kernel: [<ffffffff8155563c>] ret_from_fork+0x7c/0xb0
Mar 09 19:21:08 homura kernel: [<ffffffff81090d80>] ? kthread_create_on_node+0x1c0/0x1c0
Mar 09 19:21:08 homura kernel: Code: 00 48 89 e5 5d 48 8b 40 c8 48 c1 e8 02 83 e0 01 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 8b 87 f0 04 00 00 55 48 89 e5 <48> 8b 40 d8 5d c3 66 2e 0f 1f
Mar 09 19:21:08 homura kernel: RIP [<ffffffff81091530>] kthread_data+0x10/0x20
Mar 09 19:21:08 homura kernel: RSP <ffff8804171e38e8>
Mar 09 19:21:08 homura kernel: CR2: ffffffffffffffd8
Mar 09 19:21:08 homura kernel: ---[ end trace 29e2ce086f5ceb25 ]---
Mar 09 19:21:08 homura kernel: Fixing recursive fault but reboot is needed!Is this something I should report up to the kernel? If so, to whom?
sircmpwn@homura ~> uname -a
Linux homura 3.18.6-1-ARCH #1 SMP PREEMPT Sat Feb 7 08:44:05 CET 2015 x86_64 GNU/LinuxOffline
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