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[Bug 1507909] Re: 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]()

 

affect the same way:
[    4.266325] ------------[ cut here ]------------
[    4.266339] WARNING: CPU: 0 PID: 68 at /build/linux-TgZcQQ/linux-3.19.0/sound/pci/hda/hda_i915.c:115 snd_hdac_i915_register_notifier+0x35/0x40 [snd_hda_intel]()
[    4.266341] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_intel_sst_acpi snd_intel_sst_core snd_soc_sst_mfld_platform snd_hda_intel snd_soc_core snd_hda_controller snd_hda_codec snd_compress intel_rapl snd_pcm_dmaengine snd_hwdep intel_powerclamp snd_pcm coretemp snd_seq_midi kvm_intel snd_seq_midi_event kvm snd_rawmidi i915 crct10dif_pclmul snd_seq crc32_pclmul ghash_clmulni_intel cryptd snd_seq_device snd_timer drm_kms_helper drm snd serio_raw joydev lpc_ich soundcore i2c_algo_bit shpchp mei_txe mei iosf_mbi snd_soc_sst_acpi video 8250_fintek mac_hid tpm_infineon crystalhd(OE) parport_pc ppdev lp parport sunrpc autofs4 pata_acpi hid_generic usbhid hid psmouse pata_jmicron r8169 mii ahci libahci
[    4.266395] CPU: 0 PID: 68 Comm: kworker/0:1 Tainted: G           OE  3.19.0-33-generic #38-Ubuntu
[    4.266397] Hardware name: ASUS All Series/J1900I-C, BIOS 0805 09/16/2015
[    4.266402] Workqueue: events azx_probe_work [snd_hda_intel]
[    4.266405]  ffffffffc0582838 ffff8801787dbbf8 ffffffff817c4f9f 0000000000000007
[    4.266409]  0000000000000000 ffff8801787dbc38 ffffffff81076a8a ffff8801787dbc08
[    4.266413]  ffffffffc05b3b28 ffff88017a200000 ffff88017834b800 00000000ffffffff
[    4.266417] Call Trace:
[    4.266428]  [<ffffffff817c4f9f>] dump_stack+0x45/0x57
[    4.266434]  [<ffffffff81076a8a>] warn_slowpath_common+0x8a/0xc0
[    4.266438]  [<ffffffff81076b7a>] warn_slowpath_null+0x1a/0x20
[    4.266443]  [<ffffffffc057faf5>] snd_hdac_i915_register_notifier+0x35/0x40 [snd_hda_intel]
[    4.266450]  [<ffffffffc05b101d>] patch_generic_hdmi+0x58d/0x6c0 [snd_hda_codec_hdmi]
[    4.266457]  [<ffffffff811da205>] ? __kmalloc_track_caller+0x1a5/0x260
[    4.266476]  [<ffffffffc05cf359>] ? snd_hda_codec_configure+0x409/0x5a0 [snd_hda_codec]
[    4.266484]  [<ffffffffc05cf152>] snd_hda_codec_configure+0x202/0x5a0 [snd_hda_codec]
[    4.266491]  [<ffffffffc054b5e0>] ? azx_bus_reset+0xb0/0xb0 [snd_hda_controller]
[    4.266496]  [<ffffffffc054a940>] ? azx_halt+0x40/0x40 [snd_hda_controller]
[    4.266500]  [<ffffffffc0549e40>] ? azx_pcm_prepare+0x510/0x510 [snd_hda_controller]
[    4.266505]  [<ffffffffc0548c50>] ? azx_pcm_hw_params+0xa0/0xa0 [snd_hda_controller]
[    4.266510]  [<ffffffffc0548f98>] azx_codec_configure+0x38/0x60 [snd_hda_controller]
[    4.266515]  [<ffffffffc057e5d4>] azx_probe_continue+0x4f4/0x810 [snd_hda_intel]
[    4.266520]  [<ffffffffc057e985>] azx_probe_work+0x15/0x20 [snd_hda_intel]
[    4.266525]  [<ffffffff8108fd78>] process_one_work+0x158/0x430
[    4.266529]  [<ffffffff810908bb>] worker_thread+0x5b/0x530
[    4.266533]  [<ffffffff81090860>] ? rescuer_thread+0x3a0/0x3a0
[    4.266537]  [<ffffffff81095959>] kthread+0xc9/0xe0
[    4.266541]  [<ffffffff81095890>] ? kthread_create_on_node+0x1c0/0x1c0
[    4.266545]  [<ffffffff817cc018>] ret_from_fork+0x58/0x90
[    4.266550]  [<ffffffff81095890>] ? kthread_create_on_node+0x1c0/0x1c0
[    4.266552] ---[ end trace ec56967dba95c3e0 ]---

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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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