[ 16.071419] vboxdrv: Trying to deactivate the NMI watchdog permanently... [ 16.071422] vboxdrv: Warning: 2.6.31+ kernel detected. Most likely the hardware performance [ 16.071423] vboxdrv: counter framework which can generate NMIs is active. You have to prevent [ 16.071424] vboxdrv: the usage of hardware performance counters by [ 16.071425] vboxdrv: echo 2 > /proc/sys/kernel/perf_counter_paranoid [ 16.071428] vboxdrv: Found 4 processor cores. [ 16.071551] VBoxDrv: dbg - g_abExecMemory=ffffffffa032f9c0 [ 16.071638] vboxdrv: fAsync=0 offMin=0x2eb offMax=0x527a [ 16.071681] vboxdrv: TSC mode is 'synchronous', kernel timer mode is 'normal'. [ 16.071683] vboxdrv: Successfully loaded version 3.1.4 (interface 0x00100001). [ 17.124836] ppdev: user-space parallel port driver [ 22.680047] eth0: no IPv6 routers present [ 679.510329] process `skype' is using obsolete setsockopt SO_BSDCOMPAT [55263.101818] atl1 0000:02:00.0: eth0 link is down [55264.755376] atl1 0000:02:00.0: eth0 link is up 100 Mbps full duplex [58824.214425] ------------[ cut here ]------------ [58824.214437] WARNING: at /build/buildd/linux-2.6.32/lib/kref.c:43 kref_get+0x2d/0x30() [58824.214440] Hardware name: P5KC [58824.214442] Modules linked in: binfmt_misc ppdev vboxnetadp vboxnetflt vboxdrv snd_hda_codec_atihdmi snd_hda_codec_realtek saa7134_alsa tuner_simple tuner_types fbcon tileblit tea5767 snd_hda_intel font bitblit softcursor snd_hda_codec vga16fb snd_hwdep tuner snd_pcm_oss snd_mixer_oss snd_pcm vgastate snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event saa7134 snd_seq snd_timer ir_common v4l2_common videodev v4l1_compat v4l2_compat_ioctl32 videobuf_dma_sg videobuf_core snd_seq_device snd tveeprom radeon soundcore ttm drm_kms_helper snd_page_alloc intel_agp drm i2c_algo_bit asus_atk0110 lp parport usbhid ohci1394 atl1 mii ieee1394 [58824.214503] Pid: 15, comm: events/0 Not tainted 2.6.32-15-generic #22-Ubuntu [58824.214506] Call Trace: [58824.214514] [] warn_slowpath_common+0x7b/0xc0 [58824.214518] [] warn_slowpath_null+0x14/0x20 [58824.214522] [] kref_get+0x2d/0x30 [58824.214531] [] ttm_bo_delayed_delete+0x94/0x170 [ttm] [58824.214539] [] ? ttm_bo_delayed_workqueue+0x0/0x40 [ttm] [58824.214545] [] ttm_bo_delayed_workqueue+0x1f/0x40 [ttm] [58824.214550] [] run_workqueue+0xc7/0x1a0 [58824.214555] [] worker_thread+0xa3/0x110 [58824.214559] [] ? autoremove_wake_function+0x0/0x40 [58824.214563] [] ? worker_thread+0x0/0x110 [58824.214567] [] kthread+0x96/0xa0 [58824.214572] [] child_rip+0xa/0x20 [58824.214576] [] ? kthread+0x0/0xa0 [58824.214579] [] ? child_rip+0x0/0x20 [58824.214582] ---[ end trace 94142127dabbae37 ]--- [58824.214591] BUG: unable to handle kernel NULL pointer dereference at 0000000000000088 [58824.214596] IP: [] __ticket_spin_lock+0x9/0x20 [58824.214603] PGD 5a143067 PUD 81dc1067 PMD 0 [58824.214608] Oops: 0002 [#1] SMP [58824.214612] last sysfs file: /sys/devices/pci0000:00/0000:00:1e.0/0000:04:03.0/local_cpus [58824.214617] CPU 0 [58824.214619] Modules linked in: binfmt_misc ppdev vboxnetadp vboxnetflt vboxdrv snd_hda_codec_atihdmi snd_hda_codec_realtek saa7134_alsa tuner_simple tuner_types fbcon tileblit tea5767 snd_hda_intel font bitblit softcursor snd_hda_codec vga16fb snd_hwdep tuner snd_pcm_oss snd_mixer_oss snd_pcm vgastate snd_seq_dummy snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event saa7134 snd_seq snd_timer ir_common v4l2_common videodev v4l1_compat v4l2_compat_ioctl32 videobuf_dma_sg videobuf_core snd_seq_device snd tveeprom radeon soundcore ttm drm_kms_helper snd_page_alloc intel_agp drm i2c_algo_bit asus_atk0110 lp parport usbhid ohci1394 atl1 mii ieee1394 [58824.214671] Pid: 15, comm: events/0 Tainted: G W 2.6.32-15-generic #22-Ubuntu P5KC [58824.214674] RIP: 0010:[] [] __ticket_spin_lock+0x9/0x20 [58824.214680] RSP: 0018:ffff88012bb33d00 EFLAGS: 00010206 [58824.214683] RAX: 0000000000000100 RBX: ffff8800bf3dc600 RCX: 0000000000000001 [58824.214686] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000088 [58824.214689] RBP: ffff88012bb33d00 R08: 00000000ffffffff R09: 0000000000000000 [58824.214692] R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 [58824.214695] R13: ffff8800bf3dc660 R14: 0000000000000088 R15: ffffffffa01787a0 [58824.214699] FS: 0000000000000000(0000) GS:ffff880028200000(0000) knlGS:0000000000000000 [58824.214702] CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b [58824.214704] CR2: 0000000000000088 CR3: 00000000b04f1000 CR4: 00000000000006f0 [58824.214708] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [58824.214711] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [58824.214714] Process events/0 (pid: 15, threadinfo ffff88012bb32000, task ffff88012bb2ade0) [58824.214717] Stack: [58824.214719] ffff88012bb33d10 ffffffff8155eede ffff88012bb33d70 ffffffffa00e23da [58824.214723] <0> ffff8800bf3dc644 ffff8800bf3dc600 ffff8800bf3dc600 ffff8800bf3dd4b8 [58824.214728] <0> ffff88012bb33d50 ffff8800bf3dc6b8 ffff8800bf3dc600 ffff8800bf3dc600 [58824.214734] Call Trace: [58824.214740] [] _spin_lock+0xe/0x20 [58824.214747] [] ttm_bo_cleanup_refs+0xda/0x2a0 [ttm] [58824.214753] [] ttm_bo_delayed_delete+0xb5/0x170 [ttm] [58824.214760] [] ? ttm_bo_delayed_workqueue+0x0/0x40 [ttm] [58824.214767] [] ttm_bo_delayed_workqueue+0x1f/0x40 [ttm] [58824.214772] [] run_workqueue+0xc7/0x1a0 [58824.214776] [] worker_thread+0xa3/0x110 [58824.214780] [] ? autoremove_wake_function+0x0/0x40 [58824.214784] [] ? worker_thread+0x0/0x110 [58824.214788] [] kthread+0x96/0xa0 [58824.214792] [] child_rip+0xa/0x20 [58824.214796] [] ? kthread+0x0/0xa0 [58824.214800] [] ? child_rip+0x0/0x20 [58824.214802] Code: 00 00 48 c7 c2 3e 95 03 81 48 c7 c1 41 95 03 81 e9 dd fe ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 55 b8 00 01 00 00 48 89 e5 66 0f c1 07 38 e0 74 06 f3 90 8a 07 eb f6 c9 c3 66 0f 1f 44 [58824.214845] RIP [] __ticket_spin_lock+0x9/0x20 [58824.214851] RSP [58824.214852] CR2: 0000000000000088 [58824.214856] ---[ end trace 94142127dabbae38 ]---