[alsa-devel] [REGRESSION] 4.1-rc4: Sound muted after boot

[Martin Steigerwald]

Hello!

On ThinkPad T520 (Intel Sandybridge) with 4.14-rc4 + two BTRFS patches and 
one Intel P-State debug patch I have no sound output on internal Intel HD 
audio codec.

According to ThinkPad T520 LED with striked-through speaker the loud speaker 
is in disabled state. Also KDE´s Phonon says a soundcard is missing. In 
alsa-mixer I see nothing as MM for muted. If I press the key next to the LED 
I get a notification on the desktop that loud speaker has been enabled / 
disabled, but the LED still is on for it being disabled.

I do not hear anything in Amarok or with aplay. alsa-mixer sound volumes are 
100 for master and PCM. I also tried with disabling "Auto-Mute Mod", but 
still no sound.
 
When I reboot and in BIOS or GRUB press the key then the LED toggles state.

When I reboot into Linux 4.0.1 sound is working fine and loud speaker 
disabled LED is toggled off, so I bet this is a regression 4.1-rc4 compared 
to 4.0.1.


The following is from non-working 4.1-rc4 kernel:

merkaba:~> lspci -s 00:1b.0 -nnv
00:1b.0 Audio device [0403]: Intel Corporation 6 Series/C200 Series Chipset 
Family High Definition Audio Controller [8086:1c20] (rev 04)
        Subsystem: Lenovo Device [17aa:21cf]
        Flags: bus master, fast devsel, latency 0, IRQ 29
        Memory at f2520000 (64-bit, non-prefetchable) [size=16K]
        Capabilities: [50] Power Management version 2
        Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
        Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
        Capabilities: [100] Virtual Channel
        Capabilities: [130] Root Complex Link
        Kernel driver in use: snd_hda_intel

merkaba:~> cat /proc/asound/cards
 0 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xf2520000 irq 29
merkaba:~> cat /proc/asound/version 
Advanced Linux Sound Architecture Driver Version k4.1.0-rc4-tp520-btrfstrim-
pstatetrace+.
merkaba:~> cat /proc/asound/devices 
  2: [ 0]   : control
  3: [ 0- 0]: digital audio playback
  4: [ 0- 0]: digital audio capture
  5: [ 0- 3]: digital audio playback
  6: [ 0- 7]: digital audio playback
  7: [ 0- 8]: digital audio playback
  8: [ 0- 0]: hardware dependent
  9: [ 0- 1]: hardware dependent
 10: [ 0- 3]: hardware dependent
 33:        : timer
merkaba:~> 


merkaba:~> aplay -L 
null
    Discard all samples (playback) or generate zero samples (capture)
pulse
    PulseAudio Sound Server
phonon
    HDA Intel PCH mit Mixer
default:CARD=PCH
    HDA Intel PCH, CX20590 Analog
    Default Audio Device
sysdefault:CARD=PCH
    HDA Intel PCH, CX20590 Analog
    Default Audio Device
front:CARD=PCH,DEV=0
    HDA Intel PCH, CX20590 Analog
    Front speakers
surround21:CARD=PCH,DEV=0
    HDA Intel PCH, CX20590 Analog
    2.1 Surround output to Front and Subwoofer speakers
surround40:CARD=PCH,DEV=0
    HDA Intel PCH, CX20590 Analog
    4.0 Surround output to Front and Rear speakers
surround41:CARD=PCH,DEV=0
    HDA Intel PCH, CX20590 Analog
    4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=PCH,DEV=0
    HDA Intel PCH, CX20590 Analog
    5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=PCH,DEV=0
    HDA Intel PCH, CX20590 Analog
    5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=PCH,DEV=0
    HDA Intel PCH, CX20590 Analog
    7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
hdmi:CARD=PCH,DEV=0
    HDA Intel PCH, HDMI 0
    HDMI Audio Output
hdmi:CARD=PCH,DEV=1
    HDA Intel PCH, HDMI 1
    HDMI Audio Output
hdmi:CARD=PCH,DEV=2
    HDA Intel PCH, HDMI 2
    HDMI Audio Output
dmix:CARD=PCH,DEV=0
    HDA Intel PCH, CX20590 Analog
    Direct sample mixing device
dmix:CARD=PCH,DEV=3
    HDA Intel PCH, HDMI 0
    Direct sample mixing device
dmix:CARD=PCH,DEV=7
    HDA Intel PCH, HDMI 1
    Direct sample mixing device
dmix:CARD=PCH,DEV=8
    HDA Intel PCH, HDMI 2
    Direct sample mixing device
dsnoop:CARD=PCH,DEV=0
    HDA Intel PCH, CX20590 Analog
    Direct sample snooping device
dsnoop:CARD=PCH,DEV=3
    HDA Intel PCH, HDMI 0
    Direct sample snooping device
dsnoop:CARD=PCH,DEV=7
    HDA Intel PCH, HDMI 1
    Direct sample snooping device
dsnoop:CARD=PCH,DEV=8
    HDA Intel PCH, HDMI 2
    Direct sample snooping device
hw:CARD=PCH,DEV=0
    HDA Intel PCH, CX20590 Analog
    Direct hardware device without any conversions
hw:CARD=PCH,DEV=3
    HDA Intel PCH, HDMI 0
    Direct hardware device without any conversions
hw:CARD=PCH,DEV=7
    HDA Intel PCH, HDMI 1
    Direct hardware device without any conversions
hw:CARD=PCH,DEV=8
    HDA Intel PCH, HDMI 2
    Direct hardware device without any conversions
plughw:CARD=PCH,DEV=0
    HDA Intel PCH, CX20590 Analog
    Hardware device with all software conversions
plughw:CARD=PCH,DEV=3
    HDA Intel PCH, HDMI 0
    Hardware device with all software conversions
plughw:CARD=PCH,DEV=7
    HDA Intel PCH, HDMI 1
    Hardware device with all software conversions
plughw:CARD=PCH,DEV=8
    HDA Intel PCH, HDMI 2
    Hardware device with all software conversions


Ciao,
-- 
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA  B82F 991B EAAC A599 84C7