Comment 4 for bug 1170710

I can confirm that too. Sound isn't working after that and alsamixer returns: cannot open mixer: No such file or directory.

It started with -18, reverting to -17 solves this. Kern log:
kernel: [ 16.654921] snd_hda_intel 0000:00:1b.0: irq 53 for MSI/MSI-X
kernel: [ 16.751208] BUG: unable to handle kernel paging request at ffff88012f10bfe0
kernel: [ 16.751258] IP: [<ffffffffa02f6820>] patch_generic_hdmi+0xe0/0x550 [snd_hda_codec_hdmi]
kernel: [ 16.751299] PGD 1c0e063 PUD bb583067 PMD 123d50063 PTE 800000012f10b161
kernel: [ 16.751347] Oops: 0003 [#1] SMP
kernel: [ 16.751377] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek joydev(F) arc4(F) snd_hda_intel(+) ath9k snd_hda_codec snd_hwdep(F) btusb ath9k_common ath9k_hw i915 snd_pcm(F) bluetooth coretemp kvm_intel snd_page_alloc(F) snd_seq_midi(F) snd_seq_midi_event(F) ath snd_rawmidi(F) mac80211 kvm snd_seq(F) snd_seq_device(F) snd_timer(F) drm_kms_helper drm cfg80211 uvcvideo i2c_algo_bit snd(F) videobuf2_vmalloc mei microcode(F) asus_laptop videobuf2_memops lp(F) mxm_wmi videobuf2_core mac_hid lpc_ich intel_ips wmi soundcore(F) videodev parport(F) psmouse(F) serio_raw(F) video(F) sparse_keymap input_polldev ahci(F) libahci(F) atl1c
kernel: [ 16.751882] CPU 0
kernel: [ 16.751895] Pid: 444, comm: modprobe Tainted: GF 3.8.0-19-generic #29-Ubuntu ASUSTeK Computer Inc. U43Jc/U43Jc
kernel: [ 16.751943] RIP: 0010:[<ffffffffa02f6820>] [<ffffffffa02f6820>] patch_generic_hdmi+0xe0/0x550 [snd_hda_codec_hdmi]
kernel: [ 16.751989] RSP: 0018:ffff88012f1c1ac0 EFLAGS: 00010283
kernel: [ 16.752013] RAX: 0000000000000008 RBX: 0000000000000002 RCX: 0000000000000002
kernel: [ 16.752043] RDX: ffff88012f10bfd8 RSI: ffff88012f10bfe0 RDI: ffff88012e899420
kernel: [ 16.752072] RBP: ffff88012f1c1af8 R08: 0000000000000001 R09: 0000000000000006
kernel: [ 16.752102] R10: 00000000000000e0 R11: 0000000000000014 R12: ffff88012e899000
kernel: [ 16.752131] R13: 0000000000000000 R14: 0000000000000002 R15: ffff88012f10c000
kernel: [ 16.752160] FS: 00007f5c77b4d740(0000) GS:ffff880137c00000(0000) knlGS:0000000000000000
kernel: [ 16.752192] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
kernel: [ 16.752217] CR2: ffff88012f10bfe0 CR3: 000000012f212000 CR4: 00000000000007f0
kernel: [ 16.752247] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
kernel: [ 16.752275] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
kernel: [ 16.752305] Process modprobe (pid: 444, threadinfo ffff88012f1c0000, task ffff88012ebd8000)
kernel: [ 16.752338] Stack:
kernel: [ 16.752350] 00000000ffffffff ffffffffa02f0002 ffffffffa02f8880 0000000000000001
kernel: [ 16.752397] ffff88012e899000 00000000ffffffff ffffffffa02fa000 ffff88012f1c1b58
kernel: [ 16.752444] ffffffffa0500186 2d6164682d646e73 64692d6365646f63 303832363830383a
kernel: [ 16.752490] Call Trace:
kernel: [ 16.752513] [<ffffffffa0500186>] snd_hda_codec_configure+0x146/0x440 [snd_hda_codec]
kernel: [ 16.752550] [<ffffffffa032a2f0>] azx_probe_continue+0x3a0/0x4f0 [snd_hda_intel]
kernel: [ 16.752584] [<ffffffffa03288b0>] ? azx_attach_pcm_stream+0x1e0/0x1e0 [snd_hda_intel]
kernel: [ 16.752618] [<ffffffffa0329cb0>] ? azx_halt+0x30/0x30 [snd_hda_intel]
kernel: [ 16.752647] [<ffffffffa03286d0>] ? azx_pcm_trigger+0x580/0x580 [snd_hda_intel]
kernel: [ 16.752679] [<ffffffffa0329810>] ? azx_runtime_suspend+0x30/0x30 [snd_hda_intel]
kernel: [ 16.752712] [<ffffffffa0326670>] ? azx_pcm_free+0x50/0x50 [snd_hda_intel]
kernel: [ 16.752743] [<ffffffffa032a79a>] azx_probe+0x35a/0x940 [snd_hda_intel]
kernel: [ 16.752774] [<ffffffff8137b47b>] local_pci_probe+0x4b/0x80
kernel: [ 16.752800] [<ffffffff8137b7a1>] pci_device_probe+0x111/0x120
kernel: [ 16.752829] [<ffffffff814556c7>] driver_probe_device+0x77/0x230
kernel: [ 16.752856] [<ffffffff8145592b>] __driver_attach+0xab/0xb0
kernel: [ 16.752881] [<ffffffff81455880>] ? driver_probe_device+0x230/0x230
kernel: [ 16.752908] [<ffffffff814539dd>] bus_for_each_dev+0x5d/0xa0
kernel: [ 16.752934] [<ffffffff814551ce>] driver_attach+0x1e/0x20
kernel: [ 16.752960] [<ffffffff81454da0>] bus_add_driver+0x190/0x280
kernel: [ 16.752987] [<ffffffffa0319000>] ? 0xffffffffa0318fff
kernel: [ 16.753011] [<ffffffff81455ff7>] driver_register+0x77/0x170
kernel: [ 16.753037] [<ffffffffa0319000>] ? 0xffffffffa0318fff
kernel: [ 16.753061] [<ffffffff8137a66c>] __pci_register_driver+0x4c/0x50
kernel: [ 16.754430] [<ffffffffa031901e>] azx_driver_init+0x1e/0x1000 [snd_hda_intel]
kernel: [ 16.755795] [<ffffffff8100215a>] do_one_initcall+0x12a/0x180
kernel: [ 16.757138] [<ffffffff810bfec7>] load_module+0x10c7/0x1520
kernel: [ 16.758466] [<ffffffff810bb830>] ? unset_module_init_ro_nx+0x80/0x80
kernel: [ 16.759761] [<ffffffff810c03e5>] sys_init_module+0xc5/0xf0
kernel: [ 16.761027] [<ffffffff816d379d>] system_call_fastpath+0x1a/0x1f
kernel: [ 16.762297] Code: 0f 1f 00 4d 8b bc 24 c0 00 00 00 25 00 e0 00 00 c1 e8 0c 83 c8 01 49 63 17 83 c0 01 83 f8 10 48 8d 14 92 49 8d 14 d7 48 8d 72 08 <66> 89 5a 08 c7 46 08 02 00 00 00 0f 86 5b 02 00 00 48 8d 4e 18
kernel: [ 16.765346] RIP [<ffffffffa02f6820>] patch_generic_hdmi+0xe0/0x550 [snd_hda_codec_hdmi]
kernel: [ 16.766709] RSP <ffff88012f1c1ac0>
kernel: [ 16.768044] CR2: ffff88012f10bfe0
kernel: [ 16.769362] ---[ end trace e93c324dec7013ee ]---