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["Fabio C. Barrionuevo" <1530405@xxxxxxxxxxxxxxxxxx>]

on my Dell Latitude 3450, Core i7-5500U, some new discoveries:

i can start my system if i:

* enable Multi Core support on BIOS
* and disable Hyperthreading on BIOS

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Title:
  NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [kerneloops:814]

Status in linux package in Ubuntu:
  Triaged

Bug description:
  I'm using Ubuntu Xenial 16.04 and my computer (ASUS M32BF) will
  randomly freeze up, sometimes before the login screen, sometimes while
  I'm in the middle of using a program. This sometimes happens on the
  Wily 15.10 live cd as well, and on both kernel 4.3.0-2, and kernel
  4.2.0-22.

  Important part of log:

  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112129] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [kerneloops:814]
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112134] Modules linked in: rfcomm bnep nls_iso8859_1 kvm_amd kvm eeepc_wmi asus_wmi crct10dif_pclmul sparse_keymap crc32_pclmul aesni_intel aes_x86_64 arc4 lrw gf128mul rtl8821ae glue_helper snd_hda_codec_realtek ablk_helper snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_intel btcoexist snd_hda_codec rtl_pci snd_hda_core joydev input_leds snd_hwdep rtlwifi snd_pcm fam15h_power cryptd snd_seq_midi serio_raw snd_seq_midi_event snd_rawmidi mac80211 snd_seq snd_seq_device snd_timer cfg80211 btusb btrtl btbcm btintel bluetooth snd soundcore edac_mce_amd k10temp edac_core i2c_piix4 shpchp mac_hid parport_pc ppdev lp parport autofs4 hid_logitech_hidpp uas usb_storage hid_logitech_dj usbhid hid amdkfd amd_iommu_v2 radeon i2c_algo_bit ttm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops r8169 psmouse mii drm ahci libahci wmi fjes video
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112183] CPU: 0 PID: 814 Comm: kerneloops Not tainted 4.3.0-2-generic #11-Ubuntu
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112184] Hardware name: ASUSTeK COMPUTER INC. K30BF_M32BF_A_F_K31BF_6/K30BF_M32BF_A_F_K31BF_6, BIOS 0501 07/09/2015
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112186] task: ffff88031146d400 ti: ffff88030e838000 task.ti: ffff88030e838000
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112188] RIP: 0010:[<ffffffff810819d6>]  [<ffffffff810819d6>] __do_softirq+0x76/0x250
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112194] RSP: 0018:ffff88031fc03f30  EFLAGS: 00000202
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112196] RAX: ffff88030e83c000 RBX: 0000000000000000 RCX: 0000000040400040
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112197] RDX: 0000000000000000 RSI: 000000000000613e RDI: 0000000000000380
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112198] RBP: ffff88031fc03f80 R08: 00000029f8fa1411 R09: ffff88031fc169f0
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112199] R10: 0000000000000020 R11: 0000000000000004 R12: ffff88031fc169c0
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112201] R13: ffff88030df8e200 R14: 0000000000000000 R15: 0000000000000001
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112202] FS:  00007f6c266ac880(0000) GS:ffff88031fc00000(0000) knlGS:0000000000000000
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112203] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112205] CR2: 00007ffef000bff8 CR3: 000000030f368000 CR4: 00000000000406f0
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112206] Stack:
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112207]  404000401fc03f78 ffff88030e83c000 00000000ffff0121 ffff88030000000a
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112209]  000000021fc0d640 0000000000000000 ffff88031fc169c0 ffff88030df8e200
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112211]  0000000000000000 0000000000000001 ffff88031fc03f90 ffffffff81081d23
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112213] Call Trace:
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112215]  <IRQ> 
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112219]  [<ffffffff81081d23>] irq_exit+0xa3/0xb0
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112222]  [<ffffffff817fda02>] smp_apic_timer_interrupt+0x42/0x50
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112225]  [<ffffffff817fb862>] apic_timer_interrupt+0x82/0x90
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112226]  <EOI> 
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112230]  [<ffffffff810a5457>] ? finish_task_switch+0x67/0x1c0
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112232]  [<ffffffff817f645c>] __schedule+0x36c/0x980
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112234]  [<ffffffff817f6aa3>] schedule+0x33/0x80
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112236]  [<ffffffff817f9e4f>] do_nanosleep+0x6f/0xf0
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112239]  [<ffffffff810ea59c>] hrtimer_nanosleep+0xdc/0x1f0
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112241]  [<ffffffff810e9500>] ? __hrtimer_init+0x90/0x90
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112243]  [<ffffffff817f9e3a>] ? do_nanosleep+0x5a/0xf0
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112245]  [<ffffffff810ea72a>] SyS_nanosleep+0x7a/0x90
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112247]  [<ffffffff817faaf2>] entry_SYSCALL_64_fastpath+0x16/0x71
  Dec 31 19:13:12 COMPUTERNAME kernel: [   64.112248] Code: 45 d4 89 4d b4 65 48 8b 04 25 c4 3e 01 00 c7 45 c8 0a 00 00 00 48 89 45 b8 65 c7 05 31 24 f9 7e 00 00 00 00 fb 66 0f 1f 44 00 00 <b8> ff ff ff ff 49 c7 c4 c0 b0 e0 81 0f bc 45 d4 83 c0 01 89 45 

  This soft lockup happens either in kerneloops or swapper/0.

  This might have something to do with networking, because the soft
  lockups appear happen immediately before or after some network-related
  stuff. nm-applet says NetworkManager is not running, but "service
  network-manager status" says it is. "service network-manager stop"
  does not work, and I need to "kill -9" the pids for the processes.
  After starting the service after killing it, it the nm-applet's "Edit
  Connection" works for a few moments, then it won't delete any
  connections, and when closed, it won't re-open. At then end "kill -9"
  won't even work anymore (the processes get parented to init, but do
  not die). Usually, however, I never even see the login screen.

  I've been able to boot into the Wily livecd by using Windows 10 ->
  Shift-Restart -> UEFI Settings -> then booting my USB with the livecd
  (often soft lockups without going through windows).

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