Algumas atualizações normais mataram meu dispositivo de som

Eu sou um usuário simples do pulseaudio. Sem configurações especiais.

Uso o kubuntu 18.04 com bom áudio neste notebook há anos.

Um mês ou dois atrás, uma atualização do kernel quebrou meu áudio, então reverti para o kernel anterior até que o próximo fosse lançado, que funcionou novamente.

Acabei de instalar algumas atualizações normais no meu sistema e o áudio não funciona mais.

Eu não reinicio com muita frequência - a menos que uma atualização exija, então não tenho certeza se algo quebrou, mas não se manifestou até que eu tivesse que reiniciar para o novo kernel.

Como posso consertar isso?

Acabei de reiniciar e meu áudio sumiu. O aparelho desapareceu. (kubuntu 18.04 Intel 64 bits)

Estava funcionando bem mais cedo ontem.

Tentei voltar ao kernel anterior.

Eu tentei algumas versões anteriores do linux-firmware.

dmesg mostra isso

[Tue Jul 14 11:40:17 2020] snd_hda_codec_conexant hdaudioC1D0: CX20756:
BIOS auto-probing.
[Tue Jul 14 11:40:17 2020] snd_hda_codec_conexant hdaudioC1D0:
autoconfig for CX20756: line_outs=1 (0x17/0x0/0x0/0x0/0x0) type:speak$
[Tue Jul 14 11:40:17 2020] snd_hda_codec_conexant hdaudioC1D0:   
speaker_outs=0 (0x0/0x0/0x0/0x0/0x0)
[Tue Jul 14 11:40:17 2020] snd_hda_codec_conexant hdaudioC1D0:   
hp_outs=1 (0x16/0x0/0x0/0x0/0x0)
[Tue Jul 14 11:40:17 2020] snd_hda_codec_conexant hdaudioC1D0:    mono:
mono_out=0x0
[Tue Jul 14 11:40:17 2020] snd_hda_codec_conexant hdaudioC1D0:    inputs:
[Tue Jul 14 11:40:17 2020] snd_hda_codec_conexant hdaudioC1D0:     
Internal Mic=0x1a
[Tue Jul 14 11:40:17 2020] snd_hda_codec_conexant hdaudioC1D0:      Mic=0x19
[Tue Jul 14 11:40:17 2020] snd_hda_codec_conexant hdaudioC1D0: Enable
sync_write for stable communication
[Tue Jul 14 11:40:17 2020] input: HDA Intel PCH Mic as
/devices/pci0000:00/0000:00:1b.0/sound/card1/input15
[Tue Jul 14 11:40:17 2020] input: HDA Intel PCH Headphone as
/devices/pci0000:00/0000:00:1b.0/sound/card1/input16
[Tue Jul 14 11:40:17 2020] input: HDA Intel HDMI HDMI/DP,pcm=3 as
/devices/pci0000:00/0000:00:03.0/sound/card0/input17
[Tue Jul 14 11:40:17 2020] input: HDA Intel HDMI HDMI/DP,pcm=7 as
/devices/pci0000:00/0000:00:03.0/sound/card0/input18
[Tue Jul 14 11:40:17 2020] input: HDA Intel HDMI HDMI/DP,pcm=8 as
/devices/pci0000:00/0000:00:03.0/sound/card0/input19
[Tue Jul 14 11:40:17 2020] input: HDA Intel HDMI HDMI/DP,pcm=9 as
/devices/pci0000:00/0000:00:03.0/sound/card0/input20
[Tue Jul 14 11:40:17 2020] input: HDA Intel HDMI HDMI/DP,pcm=10 as
/devices/pci0000:00/0000:00:03.0/sound/card0/input21

Isso é um monte de zeros, mas não sei como fica quando funciona.

Tentei reproduzir um mp3 e o Amarok diz que não há dispositivo - voltando ao padrão.

As configurações do sistema mostram apenas o padrão. Geralmente, há um dispositivo analógico e um dispositivo digital (HDMI).

Eu passei pelo meu histórico de pacotes e nada mais salta para mim.

bigbird@sananda:~/sandbox$ pulseaudio --check
bigbird@sananda:~/sandbox$ echo $?
1
bigbird@sananda:~/sandbox$ pulseaudio --start
E: [pulseaudio] main.c: Daemon startup failed.

Não, não está funcionando e também não quer.

bigbird@sananda:~/sandbox$ export PULSE_LOG=99
bigbird@sananda:~/sandbox$ pulseaudio --start
D: [pulseaudio] caps.c: Cleaning up privileges.
D: [pulseaudio] conf-parser.c: Parsing configuration file '/etc/pulse/daemon.conf'
D: [pulseaudio] conf-parser.c: /etc/pulse/daemon.conf.d does not exist, ignoring.
D: [pulseaudio] conf-parser.c: Parsing configuration file '/etc/pulse/client.conf'
D: [pulseaudio] conf-parser.c: /etc/pulse/client.conf.d does not exist, ignoring.
E: [pulseaudio] main.c: Daemon startup failed.

bigbird@sananda:/etc/pulse$ ls
client.conf  daemon.conf  default.pa  default.pa.dpkg-old  system.pa

Então, eu tenho arquivos .conf, mas nenhum arquivo conf.d.

bigbird@sananda:/etc/pulse$ pulseaudio -vvvvv
D: [pulseaudio] caps.c: Cleaning up privileges.
D: [pulseaudio] conf-parser.c: Parsing configuration file '/etc/pulse/daemon.conf'
D: [pulseaudio] conf-parser.c: /etc/pulse/daemon.conf.d does not exist, ignoring.
I: [pulseaudio] main.c: setrlimit(RLIMIT_NICE, (31, 31)) failed: Operation not permitted
I: [pulseaudio] main.c: setrlimit(RLIMIT_RTPRIO, (9, 9)) failed: Operation not permitted
D: [pulseaudio] core-rtclock.c: Timer slack is set to 50 us.
D: [pulseaudio] core-util.c: RealtimeKit worked.
I: [pulseaudio] core-util.c: Successfully gained nice level -11.
I: [pulseaudio] main.c: This is PulseAudio 11.1
D: [pulseaudio] main.c: Compilation host: x86_64-pc-linux-gnu
D: [pulseaudio] main.c: Compilation CFLAGS: -g -O2 -fdebug-prefix-map=/build/pulseaudio-3lFkjS/pulseaudio-11.1=. -fstack-protector-strong -Wformat -Werror=format-security -Wall -W -Wextra -pipe -Wno-long-long -Wno-overlength-strings -Wunsafe-loop-optimizations -Wundef -Wformat=2 -Wlogical-op -Wsign-compare -Wformat-security -Wmissing-include-dirs -Wformat-nonliteral -Wpointer-arith -Winit-self -Wdeclaration-after-statement -Wfloat-equal -Wmissing-prototypes -Wredundant-decls -Wmissing-declarations -Wmissing-noreturn -Wshadow -Wendif-labels -Wcast-align -Wstrict-aliasing -Wwrite-strings -Wno-unused-parameter -ffast-math -fno-common -fdiagnostics-show-option -fdiagnostics-color=auto
D: [pulseaudio] main.c: Running on host: Linux x86_64 4.15.0-109-generic #110-Ubuntu SMP Tue Jun 23 02:39:32 UTC 2020
D: [pulseaudio] main.c: Found 4 CPUs.
I: [pulseaudio] main.c: Page size is 4096 bytes
D: [pulseaudio] main.c: Compiled with Valgrind support: no
D: [pulseaudio] main.c: Running in valgrind mode: no
D: [pulseaudio] main.c: Running in VM: no
D: [pulseaudio] main.c: Optimized build: yes
D: [pulseaudio] main.c: FASTPATH defined, only fast path asserts disabled.
I: [pulseaudio] main.c: Machine ID is 02069b02445e453a99fc7b9858bb4a27.
I: [pulseaudio] main.c: Session ID is 3.
I: [pulseaudio] main.c: Using runtime directory /run/user/1000/pulse.
I: [pulseaudio] main.c: Using state directory /home/bigbird/.config/pulse.
I: [pulseaudio] main.c: Using modules directory /usr/lib/pulse-11.1/modules.
I: [pulseaudio] main.c: Running in system mode: no
I: [pulseaudio] main.c: System supports high resolution timers
D: [pulseaudio] memblock.c: Using shared memfd memory pool with 1024 slots of size 64.0 KiB each, total size is 64.0 MiB, maximum usable slot size is 65472
I: [pulseaudio] cpu-x86.c: CPU flags: CMOV MMX SSE SSE2 SSE3 SSSE3 SSE4_1 SSE4_2
I: [pulseaudio] svolume_mmx.c: Initialising MMX optimized volume functions.
I: [pulseaudio] remap_mmx.c: Initialising MMX optimized remappers.
I: [pulseaudio] svolume_sse.c: Initialising SSE2 optimized volume functions.
I: [pulseaudio] remap_sse.c: Initialising SSE2 optimized remappers.
I: [pulseaudio] sconv_sse.c: Initialising SSE2 optimized conversions.
I: [pulseaudio] svolume_orc.c: Initialising ORC optimized volume functions.
W: [pulseaudio] module-equalizer-sink.c: module-equalizer-sink is currently unsupported, and can sometimes cause PulseAudio crashes, increased latency or audible artifacts.
W: [pulseaudio] module-equalizer-sink.c: If you're facing audio problems, try unloading this module as a potential workaround.
E: [pulseaudio] module-equalizer-sink.c: Master sink not found
E: [pulseaudio] module.c: Failed to load module "module-equalizer-sink" (argument: ""): initialization failed.
E: [pulseaudio] main.c: Module load failed.
E: [pulseaudio] main.c: Failed to initialize daemon.
I: [pulseaudio] main.c: Daemon terminated.

bigbird@sananda:/etc/pulse$ aplay -l
**** List of PLAYBACK Hardware Devices ****
Parsing configuration file '/etc/pulse/client.conf'
/etc/pulse/client.conf.d does not exist, ignoring.
Using shared memfd memory pool with 1024 slots of size 64.0 KiB each, total size is 64.0 MiB, maximum usable slot size is 65472
Trying to connect to /run/user/1000/pulse/native...
connect(): No such file or directory (2)
Trying to connect to /var/run/pulse/native...
connect(): No such file or directory (2)
Trying to autospawn...
D: [pulseaudio] caps.c: Cleaning up privileges.
D: [pulseaudio] conf-parser.c: Parsing configuration file '/etc/pulse/daemon.conf'
D: [pulseaudio] conf-parser.c: /etc/pulse/daemon.conf.d does not exist, ignoring.
card 0: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 9: HDMI 3 [HDMI 3]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 0: HDMI [HDA Intel HDMI], device 10: HDMI 4 [HDMI 4]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
card 1: PCH [HDA Intel PCH], device 0: CX20756 Analog [CX20756 Analog]
  Subdevices: 1/1
  Subdevice #0: subdevice #0
bigbird@sananda:/etc/pulse$ cd
bigbird@sananda:~$ ls .pulse
ls: cannot access '.pulse': No such file or directory
bigbird@sananda:~$ ls .config/pulse
02069b02445e453a99fc7b9858bb4a27-card-database.tdb   0be654d3d90b45c69c8747978a3a29fc-device-volumes.tdb
02069b02445e453a99fc7b9858bb4a27-default-sink        0be654d3d90b45c69c8747978a3a29fc-runtime
02069b02445e453a99fc7b9858bb4a27-default-source      0be654d3d90b45c69c8747978a3a29fc-stream-volumes.tdb
02069b02445e453a99fc7b9858bb4a27-device-manager.tdb  cookie
02069b02445e453a99fc7b9858bb4a27-device-volumes.tdb  default.pa
02069b02445e453a99fc7b9858bb4a27-runtime             equalizer-presets.tdb
02069b02445e453a99fc7b9858bb4a27-stream-volumes.tdb  equalizer-state.tdb
0be654d3d90b45c69c8747978a3a29fc-card-database.tdb   equalizerrc
0be654d3d90b45c69c8747978a3a29fc-default-sink        equalizerrc.availablepresets
0be654d3d90b45c69c8747978a3a29fc-default-source      presets
0be654d3d90b45c69c8747978a3a29fc-device-manager.tdb
bigbird@sananda:~$