Jochen Voss 撰写http://www.seehuhn.de/pages/alsa:

Jochen Voss 撰写http://www.seehuhn.de/pages/alsa:

我通过 HDMI 将计算机显示器连接到 AV 接收器,然后将其传输到屏幕上。

我注意到,如果在启动计算机时未将 AV 接收器选为计算机频道,则 Ubuntu 将不会尝试通过 HDMI 端口传输声音,并且声音菜单中不会提供 HDMI 选项。

如果 Ubuntu 最初没有声音选项,有人知道有什么方法可以让其显示声音选项吗?目前我必须重新启动


当我无法通过 AV 接收器输出声音时,lsmod 的输出。

$ lsmod
Module                  Size  Used by
uvcvideo               81065  0 
videobuf2_vmalloc      13216  1 uvcvideo
videobuf2_memops       13362  1 videobuf2_vmalloc
videobuf2_core         59104  1 uvcvideo
v4l2_common            15682  1 videobuf2_core
videodev              149725  3 uvcvideo,v4l2_common,videobuf2_core
snd_usb_audio         165882  1 
media                  21963  2 uvcvideo,videodev
snd_usbmidi_lib        29779  1 snd_usb_audio
joydev                 17344  0 
hid_logitech_dj        18469  0 
pci_stub               12622  1 
vboxpci                23256  0 
vboxnetadp             25670  0 
vboxnetflt             27605  0 
vboxdrv               418013  3 vboxnetadp,vboxnetflt,vboxpci
bnep                   19543  2 
rfcomm                 69509  14 
hid_generic            12559  0 
usbhid                 52566  0 
btusb                  32448  0 
bluetooth             446190  33 bnep,btusb,rfcomm
6lowpan_iphc           18702  1 bluetooth
arc4                   12608  2 
snd_hda_codec_hdmi     47547  2 
nls_iso8859_1          12713  1 
iwlmvm                217797  0 
mac80211              660592  1 iwlmvm
intel_rapl             18783  0 
x86_pkg_temp_thermal    14205  0 
intel_powerclamp       18786  0 
coretemp               13441  0 
kvm_intel             143592  0 
kvm                   459835  1 kvm_intel
crct10dif_pclmul       14307  0 
crc32_pclmul           13133  0 
ghash_clmulni_intel    13230  0 
snd_hda_codec_realtek    77185  1 
snd_hda_codec_generic    68914  1 snd_hda_codec_realtek
aesni_intel           152552  2 
aes_x86_64             17131  1 aesni_intel
lrw                    13287  1 aesni_intel
gf128mul               14951  1 lrw
glue_helper            13944  1 aesni_intel
ablk_helper            13597  1 aesni_intel
cryptd                 20360  3 ghash_clmulni_intel,aesni_intel,ablk_helper
serio_raw              13434  0 
i915                  917814  7 
snd_soc_rt5640         93042  0 
mei_me                 19742  0 
snd_soc_rl6231         13037  1 snd_soc_rt5640
nouveau              1234956  0 
iwlwifi               183038  1 iwlmvm
snd_soc_core          200204  1 snd_soc_rt5640
snd_hda_intel          30420  7 
snd_compress           19200  1 snd_soc_core
snd_pcm_dmaengine      15172  1 snd_soc_core
cfg80211              510218  3 iwlwifi,mac80211,iwlmvm
snd_hda_controller     35152  1 snd_hda_intel
mxm_wmi                13021  1 nouveau
wmi                    19193  2 mxm_wmi,nouveau
snd_hda_codec         139675  5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
ttm                    97680  1 nouveau
mei                    87931  1 mei_me
snd_seq_midi           13564  0 
drm_kms_helper         61627  2 i915,nouveau
snd_hwdep              17698  2 snd_usb_audio,snd_hda_codec
snd_seq_midi_event     14899  1 snd_seq_midi
drm                   310919  8 ttm,i915,drm_kms_helper,nouveau
snd_pcm               104102  8 snd_soc_rt5640,snd_usb_audio,snd_soc_core,snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller,snd_pcm_dmaengine
shpchp                 37040  0 
i2c_algo_bit           13406  2 i915,nouveau
snd_rawmidi            30876  2 snd_usbmidi_lib,snd_seq_midi
snd_seq                67224  2 snd_seq_midi_event,snd_seq_midi
snd_seq_device         14497  3 snd_seq,snd_rawmidi,snd_seq_midi
snd_timer              29513  2 snd_pcm,snd_seq
i2c_hid                18719  0 
snd                    87611  31 snd_hda_codec_realtek,snd_usb_audio,snd_soc_core,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_usbmidi_lib,snd_hda_codec,snd_hda_intel,snd_seq_device,snd_compress
hid                   110426  6 i2c_hid,hid_generic,usbhid,hid_logitech_dj
soundcore              15052  2 snd,snd_hda_codec
video                  20128  2 i915,nouveau
snd_soc_sst_acpi       13007  0 
dw_dmac                12835  0 
mac_hid                13227  0 
dw_dmac_core           24298  1 dw_dmac
i2c_designware_platform    12979  0 
i2c_designware_core    14768  1 i2c_designware_platform
8250_dw                13551  0 
spi_pxa2xx_platform    23079  0 
acpi_pad               17942  0 
parport_pc             32741  0 
ppdev                  17671  0 
lp                     17759  0 
parport                42299  3 lp,ppdev,parport_pc
psmouse               106593  0 
ahci                   34062  3 
libahci                32424  1 ahci
e1000e                230184  0 
alx                    36680  0 
ptp                    19445  1 e1000e
mdio                   13561  1 alx
pps_core               19333  1 ptp
sdhci_acpi             13351  0 
sdhci                  43448  1 sdhci_acpi

当我可以通过 AV 接收器输出声音时的输出:

$ lsmod
Module                  Size  Used by
uvcvideo               81065  0 
videobuf2_vmalloc      13216  1 uvcvideo
videobuf2_memops       13362  1 videobuf2_vmalloc
videobuf2_core         59104  1 uvcvideo
v4l2_common            15682  1 videobuf2_core
snd_usb_audio         165882  1 
videodev              149725  3 uvcvideo,v4l2_common,videobuf2_core
snd_usbmidi_lib        29779  1 snd_usb_audio
media                  21963  2 uvcvideo,videodev
joydev                 17344  0 
hid_logitech_dj        18469  0 
pci_stub               12622  1 
vboxpci                23256  0 
vboxnetadp             25670  0 
vboxnetflt             27605  0 
vboxdrv               418013  3 vboxnetadp,vboxnetflt,vboxpci
hid_generic            12559  0 
usbhid                 52566  0 
btusb                  32448  0 
bnep                   19543  2 
rfcomm                 69509  14 
bluetooth             446190  33 bnep,btusb,rfcomm
6lowpan_iphc           18702  1 bluetooth
arc4                   12608  2 
snd_hda_codec_hdmi     47547  2 
nls_iso8859_1          12713  1 
iwlmvm                217797  0 
intel_rapl             18783  0 
mac80211              660592  1 iwlmvm
snd_soc_rt5640         93042  0 
x86_pkg_temp_thermal    14205  0 
intel_powerclamp       18786  0 
snd_soc_rl6231         13037  1 snd_soc_rt5640
coretemp               13441  0 
snd_soc_core          200204  1 snd_soc_rt5640
kvm_intel             143592  0 
kvm                   459835  1 kvm_intel
crct10dif_pclmul       14307  0 
crc32_pclmul           13133  0 
ghash_clmulni_intel    13230  0 
aesni_intel           152552  2 
aes_x86_64             17131  1 aesni_intel
lrw                    13287  1 aesni_intel
gf128mul               14951  1 lrw
glue_helper            13944  1 aesni_intel
snd_compress           19200  1 snd_soc_core
ablk_helper            13597  1 aesni_intel
snd_pcm_dmaengine      15172  1 snd_soc_core
cryptd                 20360  3 ghash_clmulni_intel,aesni_intel,ablk_helper
nouveau              1234956  0 
snd_seq_midi           13564  0 
snd_hda_codec_realtek    77185  1 
snd_seq_midi_event     14899  1 snd_seq_midi
snd_hda_codec_generic    68914  1 snd_hda_codec_realtek
serio_raw              13434  0 
iwlwifi               183038  1 iwlmvm
snd_rawmidi            30876  2 snd_usbmidi_lib,snd_seq_midi
i915                  917814  7 
cfg80211              510218  3 iwlwifi,mac80211,iwlmvm
snd_hda_intel          30420  7 
mxm_wmi                13021  1 nouveau
snd_hda_controller     35152  1 snd_hda_intel
snd_seq                67224  2 snd_seq_midi_event,snd_seq_midi
wmi                    19193  2 mxm_wmi,nouveau
snd_hda_codec         139675  5 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
ttm                    97680  1 nouveau
snd_hwdep              17698  2 snd_usb_audio,snd_hda_codec
snd_seq_device         14497  3 snd_seq,snd_rawmidi,snd_seq_midi
snd_pcm               104102  8 snd_soc_rt5640,snd_usb_audio,snd_soc_core,snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller,snd_pcm_dmaengine
drm_kms_helper         61627  2 i915,nouveau
mei_me                 19742  0 
mei                    87931  1 mei_me
drm                   310919  8 ttm,i915,drm_kms_helper,nouveau
shpchp                 37040  0 
snd_timer              29513  2 snd_pcm,snd_seq
i2c_algo_bit           13406  2 i915,nouveau
snd                    87611  31 snd_hda_codec_realtek,snd_usb_audio,snd_soc_core,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_usbmidi_lib,snd_hda_codec,snd_hda_intel,snd_seq_device,snd_compress
i2c_hid                18719  0 
hid                   110426  6 i2c_hid,hid_generic,usbhid,hid_logitech_dj
dw_dmac                12835  0 
dw_dmac_core           24298  1 dw_dmac
soundcore              15052  2 snd,snd_hda_codec
snd_soc_sst_acpi       13007  0 
video                  20128  2 i915,nouveau
mac_hid                13227  0 
i2c_designware_platform    12979  0 
8250_dw                13551  0 
i2c_designware_core    14768  1 i2c_designware_platform
spi_pxa2xx_platform    23079  0 
acpi_pad               17942  0 
parport_pc             32741  0 
ppdev                  17671  0 
lp                     17759  0 
parport                42299  3 lp,ppdev,parport_pc
psmouse               106593  0 
e1000e                230184  0 
ahci                   34062  3 
alx                    36680  0 
ptp                    19445  1 e1000e
libahci                32424  1 ahci
mdio                   13561  1 alx
pps_core               19333  1 ptp
sdhci_acpi             13351  0 
sdhci                  43448  1 sdhci_acpi

答案1

我想知道是不是因为 HDMI 不是“默认设备”,当没有在启动时尝试时,阿尔萨斯大学

即使是这样,我目前也无法测试如果不重新启动它是否有效。

所以你可以尝试一下

Jochen Voss 撰写http://www.seehuhn.de/pages/alsa

你的内核中存在 ALSA 吗?

检查/proc/asound/目录是否存在。如果目录存在,则表明您的内核支持 ALSA。

...

系统可以识别哪些声卡?

检查文件的内容/proc/asound/cards。那里的每个条目都对应一个(真实或模拟的)声卡。在我的系统上,我得到以下内容:

 0 [VirMIDI        ]: VirMIDI - VirMIDI
                      Virtual MIDI Card 1
 1 [V8237          ]: VIA8237 - VIA 8237
                      VIA 8237 with ALC850 at 0x1000, irq 21
 2 [Revolution51   ]: ICE1724 - M Audio Revolution-5.1
                      M Audio Revolution-5.1 at 0xb800, irq 16
 3 [system         ]: USB-Audio - iMic USB audio system
                      Griffin Technology, Inc iMic USB audio ...

...

这些声卡具有什么功能?

有几种方法可以找到答案。例如,/proc/asound/devices包含 ALSA 所知道的每个设备的每个组件的条目。对于上面描述的系统,我得到

  0: [ 0]   : control
  1:        : sequencer
  8: [ 0- 0]: raw midi
  9: [ 0- 1]: raw midi
 10: [ 0- 2]: raw midi
 11: [ 0- 3]: raw midi
 32: [ 1]   : control
 33:        : timer
 48: [ 1- 0]: digital audio playback
 49: [ 1- 1]: digital audio playback
 56: [ 1- 0]: digital audio capture
 57: [ 1- 1]: digital audio capture
 64: [ 2]   : control
 80: [ 2- 0]: digital audio playback
 81: [ 2- 1]: digital audio playback
 82: [ 2- 2]: digital audio playback
 88: [ 2- 0]: digital audio capture

...

如何设置默认设备?

创建一个配置文件(针对整个系统,/etc/asound.conf或者.asoundrc在您的主​​目录中),其中包含如下语句:

defaults.ctl.card 1
defaults.pcm.card 1
defaults.timer.card 1

此文件将使卡 1 成为默认卡。卡号(1在此示例中)取自/proc/asound/cards file。有关 ALSA 配置文件格式的说明,请参阅 ALSA 库 API 文档。

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