This looks rather ominous:

[    5.685128] HDA Intel 0000:80:01.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
[    5.685193] HDA Intel 0000:80:01.0: setting latency timer to 64
[    5.685210] BUG: unable to handle kernel paging request at ffffc90010f78000
[    5.685380] IP: [<ffffffffa0139c76>] azx_create+0x36b/0x73d [snd_hda_intel]
[    5.685503] PGD 7f810067 PUD 7f811067 PMD 7c6e1067 PTE 800000fd00000173
[    5.685775] Oops: 0009 [#1] SMP 
[    5.685937] last sysfs file: /sys/module/snd_timer/initstate
[    5.685998] CPU 0 
[    5.686053] Modules linked in: snd_hda_intel(+) snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event nouveau(+) snd_seq snd_timer snd_seq_device ttm drm_kms_helper snd ppdev parport_pc drm edac_core soundcore edac_mce_amd i2c_viapro snd_page_alloc i2c_algo_bit k8temp shpchp lp parport usbhid hid 8139too 8139cp floppy mii pata_via sata_via
[    5.688086] 
[    5.688143] Pid: 724, comm: work_for_cpu Not tainted 2.6.35-22-generic #33-Ubuntu K8M890-8237A/OEM
[    5.688208] RIP: 0010:[<ffffffffa0139c76>]  [<ffffffffa0139c76>] azx_create+0x36b/0x73d [snd_hda_intel]
[    5.688329] RSP: 0018:ffff880037a89e20  EFLAGS: 00010282
[    5.688389] RAX: ffffc90010f78000 RBX: ffff880037a89e80 RCX: 0000000000000000
[    5.688451] RDX: 0000000000000000 RSI: 0000000000000286 RDI: 0000000000000286
[    5.688513] RBP: ffff880037a89e70 R08: 0000000000000001 R09: 0000000000000040
[    5.688575] R10: 0000000000000008 R11: 0000000000000003 R12: ffff88007ccb7000
[    5.688637] R13: ffff88007ba4a400 R14: 0000000000000000 R15: ffff88007ba49800
[    5.688700] FS:  00007f7e6ab57700(0000) GS:ffff880001e00000(0000) knlGS:0000000000000000
[    5.688763] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[    5.688833] CR2: ffffc90010f78000 CR3: 0000000001a2a000 CR4: 00000000000006f0
[    5.688905] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[    5.688976] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[    5.689048] Process work_for_cpu (pid: 724, threadinfo ffff880037a88000, task ffff88007bd1db80)
[    5.689131] Stack:
[    5.689196]  ffffffffa014a1e0 ffffffffa013bd78 ffffffff00000000 0000000037a89e88
[    5.689425] <0> 0000000000000000 ffff88007ccb7000 ffffffffa013b520 ffff88007ccb7090
[    5.689768] <0> 0000000000000000 0000000000000000 ffff880037a89eb0 ffffffffa013a100
[    5.690003] Call Trace:
[    5.690003]  [<ffffffffa013a100>] azx_probe+0xb8/0x284 [snd_hda_intel]
[    5.690003]  [<ffffffff8107ad10>] ? do_work_for_cpu+0x0/0x30
[    5.690003]  [<ffffffff812d6ec7>] local_pci_probe+0x17/0x20
[    5.690425]  [<ffffffff8107ad28>] do_work_for_cpu+0x18/0x30
[    5.690522]  [<ffffffff8107f0b6>] kthread+0x96/0xa0
[    5.690522]  [<ffffffff8100aee4>] kernel_thread_helper+0x4/0x10
[    5.690522]  [<ffffffff8107f020>] ? kthread+0x0/0xa0
[    5.690522]  [<ffffffff8100aee0>] ? kernel_thread_helper+0x0/0x10
[    5.690522] Code: ef 31 f6 4c 89 ef 89 4d c0 e8 17 d5 ff ff 85 c0 0f 88 c3 03 00 00 4c 89 e7 e8 67 ad 19 e1 41 8b 7d 40 e8 1e 11 f9 e0 49 8b 45 38 <66> 44 8b 30 41 8b 45 14 8b 4d c0 8d 50 fd 83 fa 01 77 3f 31 d2 
[    5.690522] RIP  [<ffffffffa0139c76>] azx_create+0x36b/0x73d [snd_hda_intel]
[    5.690522]  RSP <ffff880037a89e20>
[    5.690522] CR2: ffffc90010f78000
[    5.690522] ---[ end trace 538a315165f05ce5 ]---