Happened again after watching about 7-9 minutes of YouTube.
#### syslog ####
Jan 12 21:38:57 mach kernel: [ 569.724268] sched: RT throttling activated
Jan 12 21:38:59 mach kernel: [ 571.401961] clocksource: timekeeping watchdog
on CPU2: Marking clocksource 'tsc' as unstable because the skew is too large:
Jan 12 21:38:59 mach kernel: [ 571.401981] clocksource:
'hpet' wd_now: e7f33546 wd_last: e543f369 mask: ffffffff
Jan 12 21:38:59 mach kernel: [ 571.401986] clocksource:
'tsc' cs_now: 1ea1fa20651 cs_last: 1e7e50167fd mask: ffffffffffffffff
Jan 12 21:38:59 mach kernel: [ 571.401991] tsc: Marking TSC unstable due to
clocksource watchdog
Jan 12 21:38:59 mach kernel: [ 571.403034] TSC found unstable after boot, most
likely due to broken BIOS. Use 'tsc=unstable'.
Jan 12 21:38:59 mach kernel: [ 571.403037] sched_clock: Marking unstable
(571388047245, 14818071)<-(571736398266, -333366693)
Jan 12 21:39:06 mach kernel: [ 576.435061] INFO: NMI handler
(nmi_cpu_backtrace_handler) took too long to run: 209.713 msecs
Jan 12 21:39:06 mach kernel: [ 576.435064] INFO: NMI handler
(perf_event_nmi_handler) took too long to run: 1258.275 msecs
Jan 12 21:39:06 mach kernel: [ 576.435065] perf: interrupt took too long
(9830397 > 2500), lowering kernel.perf_event_max_sample_rate to 250
Jan 12 21:39:06 mach rtkit-daemon[2525]: The canary thread is apparently
starving. Taking action.
Jan 12 21:39:06 mach rtkit-daemon[2525]: Demoting known real-time threads.
Jan 12 21:39:06 mach rtkit-daemon[2525]: Successfully demoted thread 2555 of
process 2523 (n/a).
Jan 12 21:39:06 mach rtkit-daemon[2525]: Successfully demoted thread 2554 of
process 2523 (n/a).
Jan 12 21:39:06 mach rtkit-daemon[2525]: Successfully demoted thread 2523 of
process 2523 (n/a).
Jan 12 21:39:06 mach rtkit-daemon[2525]: Demoted 3 threads.
Jan 12 21:39:43 mach kernel: [ 594.681033] INFO: NMI handler
(nmi_cpu_backtrace_handler) took too long to run: 419.422 msecs
Jan 12 21:39:43 mach kernel: [ 597.617006] hrtimer: interrupt took 1258213518
ns
Jan 12 21:39:43 mach kernel: [ 604.118141] watchdog: BUG: soft lockup - CPU#7
stuck for 21s! [ksoftirqd/7:52]
Jan 12 21:39:43 mach kernel: [ 604.118144] Modules linked in: xt_CHECKSUM
iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4
nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack libcrc32c
ipt_REJECT nf_reject_ipv4 xt_tcpudp bridge stp llc ebtable_filter ebtables
ip6table_filter ip6_tables iptable_filter nfsv3 nfs_acl cfg80211
rpcsec_gss_krb5 auth_rpcgss nfsv4 nfs lockd grace fscache zram binfmt_misc
nls_iso8859_1 edac_mce_amd kvm_amd snd_hda_codec_hdmi kvm irqbypass
crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc input_leds eeepc_wmi
asus_wmi sparse_keymap aesni_intel aes_x86_64 crypto_simd glue_helper cryptd
video wmi_bmof k10temp fam15h_power snd_hda_intel snd_hda_codec snd_hda_core
snd_hwdep snd_ctxfi snd_pcm snd_seq_midi i2c_piix4 snd_seq_midi_event
snd_rawmidi snd_seq snd_seq_device
Jan 12 21:39:43 mach kernel: [ 604.118183] snd_timer snd soundcore shpchp
mac_hid bonding parport_pc ppdev lp parport sunrpc ip_tables x_tables autofs4
btrfs xor raid6_pq hid_generic amdkfd usbhid hid amd_iommu_v2 radeon
i2c_algo_bit ttm firewire_ohci drm_kms_helper e1000e syscopyarea sysfillrect
sysimgblt firewire_core fb_sys_fops ptp crc_itu_t drm pps_core ahci r8169
libahci mii wmi
Jan 12 21:39:43 mach kernel: [ 604.118205] CPU: 7 PID: 52 Comm: ksoftirqd/7
Not tainted 4.13.0-25-generic #29-Ubuntu
Jan 12 21:39:43 mach kernel: [ 604.118206] Hardware name: To be filled by
O.E.M. To be filled by O.E.M./M5A97 EVO, BIOS 1604 10/16/2012
Jan 12 21:39:43 mach kernel: [ 604.118207] task: ffff90bda2925d00 task.stack:
ffffa067c3300000
Jan 12 21:39:43 mach kernel: [ 604.118212] RIP:
0010:_raw_spin_unlock_irqrestore+0x15/0x20
Jan 12 21:39:43 mach kernel: [ 604.118213] RSP: 0018:ffffa067c3303d40 EFLAGS:
00000286 ORIG_RAX: ffffffffffffff10
Jan 12 21:39:43 mach kernel: [ 604.118215] RAX: 0000000000000000 RBX:
0000000000000286 RCX: 0000000000000000
Jan 12 21:39:43 mach kernel: [ 604.118216] RDX: ffff90bda252e698 RSI:
0000000000000286 RDI: 0000000000000286
Jan 12 21:39:43 mach kernel: [ 604.118216] RBP: ffffa067c3303d40 R08:
0000000000000000 R09: 0000000000000000
Jan 12 21:39:43 mach kernel: [ 604.118217] R10: ffffa067c3303de0 R11:
ffff90bdbedd7870 R12: 0000000000000001
Jan 12 21:39:43 mach kernel: [ 604.118218] R13: ffff90bda252e568 R14:
ffff90bda252e238 R15: ffff90bda252e5a8
Jan 12 21:39:43 mach kernel: [ 604.118219] FS: 0000000000000000(0000)
GS:ffff90bdbedc0000(0000) knlGS:0000000000000000
Jan 12 21:39:43 mach kernel: [ 604.118220] CS: 0010 DS: 0000 ES: 0000 CR0:
0000000080050033
Jan 12 21:39:43 mach kernel: [ 604.118221] CR2: 00007f4ee88c5ff0 CR3:
000000061d9aa000 CR4: 00000000000406e0
Jan 12 21:39:43 mach kernel: [ 604.118222] Call Trace:
Jan 12 21:39:43 mach kernel: [ 604.118227] io_watchdog_func+0x12a/0x3a0
Jan 12 21:39:43 mach kernel: [ 604.118229] ? ohci_dump+0x90/0x90
Jan 12 21:39:43 mach kernel: [ 604.118231] call_timer_fn+0x33/0x130
Jan 12 21:39:43 mach kernel: [ 604.118233] run_timer_softirq+0x40f/0x470
Jan 12 21:39:43 mach kernel: [ 604.118236] ? __switch_to+0x182/0x540
Jan 12 21:39:43 mach kernel: [ 604.118238] __do_softirq+0xde/0x2a5
Jan 12 21:39:43 mach kernel: [ 604.118241] run_ksoftirqd+0x29/0x60
Jan 12 21:39:43 mach kernel: [ 604.118243] smpboot_thread_fn+0xec/0x160
Jan 12 21:39:43 mach kernel: [ 604.118245] kthread+0x125/0x140
Jan 12 21:39:43 mach kernel: [ 604.118247] ? sort_range+0x30/0x30
Jan 12 21:39:43 mach kernel: [ 604.118249] ? kthread_create_on_node+0x70/0x70
Jan 12 21:39:43 mach kernel: [ 604.118251] ret_from_fork+0x1f/0x30
Jan 12 21:39:43 mach kernel: [ 604.118252] Code: 25 dd 35 f0 65 ff ff ff 7f 89
d0 5d c3 90 90 90 90 90 90 90 90 90 0f 1f 44 00 00 55 48 89 e5 c6 07 00 0f 1f
40 00 48 89
#### end syslog ####
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https://bugs.launchpad.net/bugs/1742867
Title:
Screen blank, audio choppy, system locked
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