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[fmaste <1507909@xxxxxxxxxxxxxxxxxx>]

Same here

[   18.202308] sound hdaudioC0D0: autoconfig: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:line
[   18.202315] sound hdaudioC0D0:    speaker_outs=1 (0x15/0x0/0x0/0x0/0x0)
[   18.202319] sound hdaudioC0D0:    hp_outs=1 (0x1b/0x0/0x0/0x0/0x0)
[   18.202322] sound hdaudioC0D0:    mono: mono_out=0x0
[   18.202325] sound hdaudioC0D0:    inputs:
[   18.202329] sound hdaudioC0D0:      Front Mic=0x19
[   18.202332] sound hdaudioC0D0:      Rear Mic=0x18
[   18.202335] sound hdaudioC0D0:      Line=0x1a
[   18.235706] ------------[ cut here ]------------
[   18.235730] WARNING: CPU: 2 PID: 141 at /build/linux-S798Ny/linux-3.19.0/sound/pci/hda/hda_i915.c:115 snd_hdac_i915_register_notifier+0x35/0x40 [snd_hda_intel]()
[   18.235733] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek joydev snd_hda_codec_generic snd_intel_sst_core serio_raw snd_soc_rt5640 snd_soc_sst_mfld_platform snd_hda_intel snd_hda_controller snd_soc_rl6231 parport_pc parport snd_hda_codec snd_soc_core 8250_fintek snd_hwdep snd_compress dw_dmac i2c_hid snd_pcm_dmaengine snd_pcm spi_pxa2xx_platform dw_dmac_core snd_timer i2c_designware_platform i2c_designware_core lpc_ich rfkill_gpio snd mei_txe snd_soc_sst_acpi 8250_dw mei shpchp pwm_lpss_platform soundcore iosf_mbi pwm_lpss mac_hid autofs4 btrfs xor raid6_pq xts gf128mul dm_crypt hid_generic usbhid hid crct10dif_pclmul i915 crc32_pclmul ghash_clmulni_intel cryptd i2c_algo_bit drm_kms_helper psmouse r8169 ahci drm mii libahci video sdhci_acpi sdhci
[   18.235796] CPU: 2 PID: 141 Comm: kworker/2:2 Not tainted 3.19.0-31-generic #36-Ubuntu
[   18.235799] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./Q1900B-ITX, BIOS P1.70 11/04/2014
[   18.235805] Workqueue: events azx_probe_work [snd_hda_intel]
[   18.235809]  ffffffffc089a838 ffff8800363c3bf8 ffffffff817c4e0f 0000000000000007
[   18.235813]  0000000000000000 ffff8800363c3c38 ffffffff81076a8a ffff8800363c3c08
[   18.235817]  ffffffffc0908b28 ffff880000053000 ffff88013a4a3800 00000000ffffffff
[   18.235821] Call Trace:
[   18.235832]  [<ffffffff817c4e0f>] dump_stack+0x45/0x57
[   18.235839]  [<ffffffff81076a8a>] warn_slowpath_common+0x8a/0xc0
[   18.235844]  [<ffffffff81076b7a>] warn_slowpath_null+0x1a/0x20
[   18.235849]  [<ffffffffc0897af5>] snd_hdac_i915_register_notifier+0x35/0x40 [snd_hda_intel]
[   18.235856]  [<ffffffffc090601d>] patch_generic_hdmi+0x58d/0x6c0 [snd_hda_codec_hdmi]
[   18.235864]  [<ffffffff811da205>] ? __kmalloc_track_caller+0x1a5/0x260
[   18.235878]  [<ffffffffc084c359>] ? snd_hda_codec_configure+0x409/0x5a0 [snd_hda_codec]
[   18.235887]  [<ffffffffc084c152>] snd_hda_codec_configure+0x202/0x5a0 [snd_hda_codec]
[   18.235894]  [<ffffffffc07885e0>] ? azx_bus_reset+0xb0/0xb0 [snd_hda_controller]
[   18.235899]  [<ffffffffc0787940>] ? azx_halt+0x40/0x40 [snd_hda_controller]
[   18.235905]  [<ffffffffc0786e40>] ? azx_pcm_prepare+0x510/0x510 [snd_hda_controller]
[   18.235909]  [<ffffffffc0785c50>] ? azx_pcm_hw_params+0xa0/0xa0 [snd_hda_controller]
[   18.235915]  [<ffffffffc0785f98>] azx_codec_configure+0x38/0x60 [snd_hda_controller]
[   18.235920]  [<ffffffffc08965d4>] azx_probe_continue+0x4f4/0x810 [snd_hda_intel]
[   18.235925]  [<ffffffffc0896985>] azx_probe_work+0x15/0x20 [snd_hda_intel]
[   18.235930]  [<ffffffff8108fd78>] process_one_work+0x158/0x430
[   18.235934]  [<ffffffff810908bb>] worker_thread+0x5b/0x530
[   18.235938]  [<ffffffff81090860>] ? rescuer_thread+0x3a0/0x3a0
[   18.235942]  [<ffffffff81095959>] kthread+0xc9/0xe0
[   18.235946]  [<ffffffff81095890>] ? kthread_create_on_node+0x1c0/0x1c0
[   18.235951]  [<ffffffff817cbe98>] ret_from_fork+0x58/0x90
[   18.235955]  [<ffffffff81095890>] ? kthread_create_on_node+0x1c0/0x1c0
[   18.235958] ---[ end trace fbb9ae06e082048f ]---
[   18.271837] input: HDA Intel PCH Rear Mic as /devices/pci0000:00/0000:00:1b.0/sound/card0/input10
[   18.271993] input: HDA Intel PCH Line as /devices/pci0000:00/0000:00:1b.0/sound/card0/input11
[   18.272134] input: HDA Intel PCH Line Out as /devices/pci0000:00/0000:00:1b.0/sound/card0/input12
[   18.272246] input: HDA Intel PCH HDMI/DP,pcm=3 as /devices/pci0000:00/0000:00:1b.0/sound/card0/input13
[   18.304393] intel_soc_dts_thermal: request_threaded_irq ret -22
[   18.320278] intel_rapl: Found RAPL domain package
[   18.320285] intel_rapl: Found RAPL domain core

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https://bugs.launchpad.net/bugs/1507909

Title:
   WARNING: CPU: 1 PID: 54 at /build/linux-
  qOmAV7/linux-3.19.0/sound/pci/hda/hda_i915.c:115
  snd_hdac_i915_register_notifier+0x35/0x40 [snd_hda_intel]()

Status in bcmwl package in Ubuntu:
  Confirmed

Bug description:
  I have found this warning in dmesg at each start, even if sound seems
  to work properly :

  [   11.127798] sound hdaudioC0D0: autoconfig: line_outs=1 (0x14/0x0/0x0/0x0/0x0) type:speaker
  [   11.127805] sound hdaudioC0D0:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
  [   11.127808] sound hdaudioC0D0:    hp_outs=1 (0x21/0x0/0x0/0x0/0x0)
  [   11.127811] sound hdaudioC0D0:    mono: mono_out=0x0
  [   11.127813] sound hdaudioC0D0:    inputs:
  [   11.127817] sound hdaudioC0D0:      Mic=0x19
  [   11.127820] sound hdaudioC0D0:      Internal Mic=0x12
  [   11.155157] intel_soc_dts_thermal: request_threaded_irq ret -22
  [   11.170699] intel_soc_dts_thermal: request_threaded_irq ret -22
  [   11.190674] intel_rapl: Found RAPL domain package
  [   11.190680] intel_rapl: Found RAPL domain core
  [   11.324236] ------------[ cut here ]------------
  [   11.324247] WARNING: CPU: 1 PID: 54 at /build/linux-qOmAV7/linux-3.19.0/sound/pci/hda/hda_i915.c:115 snd_hdac_i915_register_notifier+0x35/0x40 [snd_hda_intel]()
  [   11.324250] Modules linked in: snd_hda_codec_hdmi intel_rapl snd_hda_codec_realtek snd_hda_codec_generic intel_powerclamp hp_wmi(+) sparse_keymap coretemp snd_hda_intel snd_hda_controller rfkill_gpio kvm_intel uvcvideo kvm crct10dif_pclmul crc32_pclmul videobuf2_vmalloc videobuf2_memops ghash_clmulni_intel videobuf2_core v4l2_common videodev media cryptd joydev serio_raw arc4 btusb bluetooth rtl8723be(OE) rtsx_pci_ms memstick btcoexist(OE) rtl_pci(OE) rtlwifi(OE) mac80211 cfg80211 snd_intel_sst_acpi snd_intel_sst_core snd_soc_sst_mfld_platform snd_hda_codec snd_soc_core wmi snd_compress hp_accel snd_hwdep snd_pcm_dmaengine lis3lv02d i915 snd_pcm input_polldev 8250_fintek dw_dmac dw_dmac_core video hp_wireless snd_seq_midi intel_smartconnect snd_seq_midi_event snd_rawmidi drm_kms_helper snd_seq i2c_hid
  [   11.324297]  snd_seq_device snd_timer drm hid mei_txe i2c_designware_platform i2c_designware_core i2c_algo_bit mei snd pwm_lpss_platform iosf_mbi soundcore snd_soc_sst_acpi spi_pxa2xx_platform 8250_dw lpc_ich shpchp pwm_lpss mac_hid parport_pc ppdev lp parport autofs4 rtsx_pci_sdmmc psmouse r8169 mii rtsx_pci ahci libahci sdhci_acpi sdhci
  [   11.324325] CPU: 1 PID: 54 Comm: kworker/1:1 Tainted: G           OE  3.19.0-30-generic #34-Ubuntu
  [   11.324327] Hardware name: Hewlett-Packard HP 15 Notebook PC/2213, BIOS F.36 12/18/2014
  [   11.324332] Workqueue: events azx_probe_work [snd_hda_intel]
  [   11.324334]  ffffffffc081c838 ffff8801786e3bf8 ffffffff817c4d5f 0000000000000007
  [   11.324338]  0000000000000000 ffff8801786e3c38 ffffffff81076a8a ffff8801786e3c08
  [   11.324342]  ffffffffc0891b28 ffff880178244000 ffff88017841e000 00000000ffffffff
  [   11.324346] Call Trace:
  [   11.324354]  [<ffffffff817c4d5f>] dump_stack+0x45/0x57
  [   11.324360]  [<ffffffff81076a8a>] warn_slowpath_common+0x8a/0xc0
  [   11.324364]  [<ffffffff81076b7a>] warn_slowpath_null+0x1a/0x20
  [   11.324369]  [<ffffffffc0819af5>] snd_hdac_i915_register_notifier+0x35/0x40 [snd_hda_intel]
  [   11.324375]  [<ffffffffc088f01d>] patch_generic_hdmi+0x58d/0x6c0 [snd_hda_codec_hdmi]
  [   11.324380]  [<ffffffff811da145>] ? __kmalloc_track_caller+0x1a5/0x260
  [   11.324393]  [<ffffffffc04bd359>] ? snd_hda_codec_configure+0x409/0x5a0 [snd_hda_codec]
  [   11.324401]  [<ffffffffc04bd152>] snd_hda_codec_configure+0x202/0x5a0 [snd_hda_codec]
  [   11.324407]  [<ffffffffc080c5e0>] ? azx_bus_reset+0xb0/0xb0 [snd_hda_controller]
  [   11.324412]  [<ffffffffc080b940>] ? azx_halt+0x40/0x40 [snd_hda_controller]
  [   11.324416]  [<ffffffffc080ae40>] ? azx_pcm_prepare+0x510/0x510 [snd_hda_controller]
  [   11.324421]  [<ffffffffc0809c50>] ? azx_pcm_hw_params+0xa0/0xa0 [snd_hda_controller]
  [   11.324425]  [<ffffffffc0809f98>] azx_codec_configure+0x38/0x60 [snd_hda_controller]
  [   11.324430]  [<ffffffffc08185d4>] azx_probe_continue+0x4f4/0x810 [snd_hda_intel]
  [   11.324435]  [<ffffffffc0818985>] azx_probe_work+0x15/0x20 [snd_hda_intel]
  [   11.324439]  [<ffffffff8108fd78>] process_one_work+0x158/0x430
  [   11.324443]  [<ffffffff810908bb>] worker_thread+0x5b/0x530
  [   11.324446]  [<ffffffff81090860>] ? rescuer_thread+0x3a0/0x3a0
  [   11.324450]  [<ffffffff81095959>] kthread+0xc9/0xe0
  [   11.324454]  [<ffffffff81095890>] ? kthread_create_on_node+0x1c0/0x1c0
  [   11.324458]  [<ffffffff817cbdd8>] ret_from_fork+0x58/0x90
  [   11.324462]  [<ffffffff81095890>] ? kthread_create_on_node+0x1c0/0x1c0
  [   11.324464] ---[ end trace d1b84d1b0caf45e9 ]---


  it's a uefi simple boot install of Ubuntu 15.04 on a new hp 15 r248nf 
  kernel is 3.19.0-30-generic

  please let me know if more details are needed

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