[Bug 1591485] Re: after update from kubuntu 15.10 to 16.04 soundcard isn't recognized any longer

[andschuster]

Some further information: Using dmesg I got:

[   20.403982] snd_hda_codec_realtek hdaudioC0D0: autoconfig for ALC269VB: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:speaker
[   20.403985] snd_hda_codec_realtek hdaudioC0D0:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[   20.403987] snd_hda_codec_realtek hdaudioC0D0:    hp_outs=1 (0x21/0x0/0x0/0x0/0x0)
[   20.403988] snd_hda_codec_realtek hdaudioC0D0:    mono: mono_out=0x0
[   20.403989] snd_hda_codec_realtek hdaudioC0D0:    inputs:
[   20.403991] snd_hda_codec_realtek hdaudioC0D0:      Mic=0x18
[   20.403992] snd_hda_codec_realtek hdaudioC0D0:      Internal Mic=0x12
[   20.406256] BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
[   20.407070] IP: [<ffffffff814a0daf>] acpi_ns_walk_namespace+0x4b/0x193
[   20.407872] PGD 0 
[   20.408659] Oops: 0000 [#1] SMP 
[   20.409446] Modules linked in: snd_hda_codec_realtek(+) intel_rapl x86_pkg_temp_thermal intel_powerclamp coretemp media snd_hda_codec_generic snd_hda_intel snd_hda_codec kvm snd_hda_core snd_hwdep irqbypass snd_pcm crct10dif_pclmul crc32_pclmul iwlwifi aesni_intel rtsx_pci_ms memstick cfg80211 snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer snd gpio_ich aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd joydev input_leds mac_hid serio_raw soundcore shpchp mei_me mei lpc_ich binfmt_misc parport_pc ppdev lp parport autofs4 hid_logitech_hidpp hid_logitech_dj usbhid hid rtsx_pci_sdmmc i915 r8169 video i2c_algo_bit drm_kms_helper psmouse syscopyarea sysfillrect sysimgblt mii ahci fb_sys_fops rtsx_pci libahci drm
[   20.413182] CPU: 1 PID: 379 Comm: systemd-udevd Not tainted 4.4.0-24-generic #43-Ubuntu
[   20.414121] Hardware name: LENOVO 78595BG/78595BG, BIOS 8GET36WW (1.13 ) 08/16/2011
[   20.415063] task: ffff8800359d2940 ti: ffff8801a7bf0000 task.ti: ffff8801a7bf0000
[   20.416007] RIP: 0010:[<ffffffff814a0daf>]  [<ffffffff814a0daf>] acpi_ns_walk_namespace+0x4b/0x193
[   20.416971] RSP: 0018:ffff8801a7bf39e8  EFLAGS: 00010202
[   20.417926] RAX: ffff8801a7bf3a58 RBX: 0000000000000001 RCX: 0000000000000001
[   20.418893] RDX: 00000000ffffffff RSI: 0000000000000000 RDI: 0000000000000006
[   20.419859] RBP: ffff8801a7bf3a38 R08: ffffffff814a13ac R09: 0000000000000000
[   20.420830] R10: 0000000000000001 R11: ffff880035864680 R12: 0000000000000001
[   20.421810] R13: ffff8800bf3a4000 R14: 0000000000000000 R15: 0000000000000000
[   20.422799] FS:  00007fb5f0a1a8c0(0000) GS:ffff8801af500000(0000) knlGS:0000000000000000
[   20.423797] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   20.424800] CR2: 0000000000000018 CR3: 00000001a7bb3000 CR4: 00000000000406e0
[   20.425813] Stack:
[   20.426812]  0000000000000004 0000000000000000 ffffffff814a13ac 00000001ffffffff
[   20.427846]  0000000000000006 0000000000000000 0000000000000000 ffff8800bf3a4000
[   20.428880]  ffff8800350ce000 ffffffffc05e56d0 ffff8801a7bf3a80 ffffffff814a12b2
[   20.429922] Call Trace:
[   20.430950]  [<ffffffff814a13ac>] ? acpi_walk_namespace+0xd0/0xd0
[   20.432000]  [<ffffffff814a12b2>] acpi_get_devices+0x6a/0x94
[   20.433050]  [<ffffffffc05dc350>] ? alc_fixup_disable_aamix+0x20/0x20 [snd_hda_codec_realtek]
[   20.434111]  [<ffffffffc05e063c>] hda_fixup_thinkpad_acpi+0xbc/0x1f0 [snd_hda_codec_realtek]
[   20.435190]  [<ffffffffc0644985>] apply_fixup+0x1b5/0x2b0 [snd_hda_codec]
[   20.436264]  [<ffffffffc0644aa2>] snd_hda_apply_fixup+0x22/0x30 [snd_hda_codec]
[   20.437338]  [<ffffffffc05e1706>] patch_alc269+0x246/0x460 [snd_hda_codec_realtek]
[   20.438419]  [<ffffffffc063d45b>] hda_codec_driver_probe+0x6b/0x100 [snd_hda_codec]
[   20.439498]  [<ffffffff8154d772>] driver_probe_device+0x222/0x4a0
[   20.440571]  [<ffffffff8154da74>] __driver_attach+0x84/0x90
[   20.441642]  [<ffffffff8154d9f0>] ? driver_probe_device+0x4a0/0x4a0
[   20.442714]  [<ffffffff8154b39c>] bus_for_each_dev+0x6c/0xc0
[   20.443784]  [<ffffffff8154cf2e>] driver_attach+0x1e/0x20
[   20.444852]  [<ffffffff8154ca6b>] bus_add_driver+0x1eb/0x280
[   20.445918]  [<ffffffffc05f1000>] ? 0xffffffffc05f1000
[   20.446972]  [<ffffffff8154e380>] driver_register+0x60/0xe0
[   20.448032]  [<ffffffffc063d0da>] __hda_codec_driver_register+0x5a/0x60 [snd_hda_codec]
[   20.449102]  [<ffffffffc05f101e>] realtek_driver_init+0x1e/0x1000 [snd_hda_codec_realtek]
[   20.450174]  [<ffffffff81002123>] do_one_initcall+0xb3/0x200
[   20.451243]  [<ffffffff811cf151>] ? __vunmap+0x91/0xe0
[   20.452309]  [<ffffffff811eb313>] ? kmem_cache_alloc_trace+0x183/0x1f0
[   20.453377]  [<ffffffff811ec10a>] ? kfree+0x13a/0x150
[   20.454447]  [<ffffffff8118c463>] do_init_module+0x5f/0x1cf
[   20.455508]  [<ffffffff81109fb7>] load_module+0x1667/0x1c00
[   20.456559]  [<ffffffff81106560>] ? __symbol_put+0x60/0x60
[   20.457603]  [<ffffffff81212be0>] ? kernel_read+0x50/0x80
[   20.458635]  [<ffffffff8110a794>] SYSC_finit_module+0xb4/0xe0
[   20.459673]  [<ffffffff8110a7de>] SyS_finit_module+0xe/0x10
[   20.460709]  [<ffffffff81825bf2>] entry_SYSCALL_64_fastpath+0x16/0x71
[   20.461738] Code: 28 48 ff c6 4c 0f 44 35 88 c3 d3 00 89 7d d0 89 55 c8 45 31 ff 89 4d cc 4c 89 45 c0 41 83 e4 01 4c 89 4d b8 c7 45 d4 00 00 00 00 <4d> 8b 6e 18 85 db 0f 84 ff 00 00 00 4d 85 ed 0f 84 f6 00 00 00 
[   20.464110] RIP  [<ffffffff814a0daf>] acpi_ns_walk_namespace+0x4b/0x193
[   20.465248]  RSP <ffff8801a7bf39e8>
[   20.466381] CR2: 0000000000000018
[   20.467501] ---[ end trace c0b074f98df6eac7 ]---

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https://bugs.launchpad.net/bugs/1591485

Title:
  after update from kubuntu 15.10 to 16.04 soundcard isn't recognized
  any longer

Status in ubuntu-release-upgrader package in Ubuntu:
  New

Bug description:
  Using Kubuntu 15.10 my sound system works well on my Thinkpad L520.
  After upgrading to 16.04 the sound device isn't recognized any longer.
  "aplay -l" reports that there is no sound device. lspci reports for
  the type of the device:

  00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset
  Family High Definition Audio Controller (rev 04)

  The following modules are loaded:

  lsmod|grep snd
  snd_hda_codec_realtek    81920  2
  snd_hda_codec_generic    77824  1 snd_hda_codec_realtek
  snd_hda_intel          36864  0
  snd_hda_codec         135168  3 snd_hda_codec_realtek,snd_hda_codec_generic,snd_hda_intel
  snd_hda_core           73728  4 snd_hda_codec_realtek,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel
  snd_hwdep              16384  1 snd_hda_codec
  snd_pcm               106496  3 snd_hda_codec,snd_hda_intel,snd_hda_core
  snd_seq_midi           16384  0
  snd_seq_midi_event     16384  1 snd_seq_midi
  snd_rawmidi            32768  1 snd_seq_midi
  snd_seq                69632  2 snd_seq_midi_event,snd_seq_midi
  snd_seq_device         16384  3 snd_seq,snd_rawmidi,snd_seq_midi
  snd_timer              32768  2 snd_pcm,snd_seq
  snd                    81920  10 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device
  soundcore              16384  1 snd

  
  lsb_release -rd
  Description:    Ubuntu 16.04 LTS
  Release:        16.04

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