[alsa-devel] Realtek ALC892 / snd-hda-intel breakage between 3.16 & 3.19

[Raymond Yau]

2015-5-28 上午3:01 於 "Sander Smeenk" <ssmeenk at freshdot.net> 寫道：
>
> Hi,
>
> After upgrading from 3.16.0-38-generic (Ubuntu Utopic) to
> 3.19.0-18-generic (Ubuntu Vivid) my audio stopped working.
> The issue appears to be in the snd-hda-intel driver.
>
> 'Alsa-info' is attached as gzip text, or online in paste bins:
> - 3.19, broken:  https://8n1.org/10575/e5c1
> - 3.16, working: https://8n1.org/10576/0631
>
> With 3.19, tools fail like:
> | [sanders at msi:~] % aplay test.wav
> | Playing WAVE 'test.wav' : Signed 16 bit Little Endian, Rate 44100 Hz,
Stereo
> | ALSA lib pcm_pulse.c:752:(pulse_prepare) PulseAudio: Unable to create
stream: No such entity
> | aplay: set_params:1297: Unable to install hw params:
> | [ .. ]
> |
> | [sanders at msi:~] % mplayer -ao alsa test.wav
> | Selected audio codec: Uncompressed PCM [pcm]
> | [ .. ]
> | AUDIO: 44100 Hz, 2 ch, s16le, 1411.2 kbit/100.00% (ratio:
> | 176400->176400)
> | [AO_ALSA] alsa-lib: pcm_pulse.c:752:(pulse_prepare) PulseAudio: Unable
to create stream: No such entity
> | [AO_ALSA] Unable to set hw-parameters: Input/output error
> | Failed to initialize audio driver 'alsa'
> | Could not open/initialize audio device -> no sound.
>
> And i have only one card listed in /proc/asound/cards, index 1 not 0:
> | [sanders at msi:~] % cat /proc/asound/cards
> |  1 [PCH            ]: HDA-Intel - HDA Intel PCH
> |                       HDA Intel PCH at 0xf7b10000 irq 36
>
> This all works perfectly fine with 3.16.
>
> Please let me know when i can supply more information to dig into this!
>

HDMI fail because drm/i915 fail

> | ALSA lib pcm_pulse.c:752:(pulse_prepare) PulseAudio: Unable to create
stream: No such entity

This seem pulseaudio fail

[000d00h02m01s] [drm] Initialized i915 1.6.0 20141121 for 0000:00:02.0 on
minor 0
[000d00h02m01s] snd_hda_intel 0000:00:03.0: enabling device (0000 -> 0002)
[000d00h02m01s] snd_hda_intel 0000:00:1b.0: enabling device (0000 -> 0002)
[000d00h02m01s] fbcon: inteldrmfb (fb0) is primary device
--
[000d00h02m01s] iwlwifi 0000:05:00.0: enabling device (0000 -> 0002)
[000d00h02m01s] sound hdaudioC1D0: autoconfig: line_outs=1
(0x1b/0x0/0x0/0x0/0x0) type:speaker
[000d00h02m01s] sound hdaudioC1D0:    speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[000d00h02m01s] sound hdaudioC1D0:    hp_outs=1 (0x14/0x0/0x0/0x0/0x0)
[000d00h02m01s] sound hdaudioC1D0:    mono: mono_out=0x0
[000d00h02m01s] sound hdaudioC1D0:    dig-out=0x1e/0x0
[000d00h02m01s] sound hdaudioC1D0:    inputs:
[000d00h02m01s] sound hdaudioC1D0:      Internal Mic=0x19
[000d00h02m01s] sound hdaudioC1D0:      Mic=0x18
[000d00h02m01s] input: HDA Intel PCH Mic as
/devices/pci0000:00/0000:00:1b.0/sound/card1/input10
[000d00h02m01s] input: HDA Intel PCH Headphone as
/devices/pci0000:00/0000:00:1b.0/sound/card1/input11
[000d00h02m01s] iwlwifi 0000:05:00.0: loaded firmware version 25.17.12.0
op_mode iwlmvm
--
[000d00h02m01s] Could not create debugfs 'i915_pipe_update_start' directory
[000d00h02m01s] snd_hda_intel 0000:00:03.0: Cannot turn on display power on
i915