On Du, 30 ian 22, 12:47:27, Pankaj Jangid wrote:
> Andrei POPESCU <andreimpope...@gmail.com> writes:
> 
> >> During the boot process, the system detects everything. So there must be
> >> something in the init sequence that I can trigger manually.
> >
> > You can try to unload and reload the corresponding kernel module. Check 
> > the output of
> >
> >     lsmod | grep snd
> >
> > (it's probably snd-usb-audio)
> >
> > If it works it might be possible to add the module to some list so that 
> > it is removed on suspend and loaded on resume.
> 
> Thanks Andrei.
> 
> "lsmod|grep snd" results in,
> 
> --8<---------------cut here---------------start------------->8---
> pankaj@anant:~$ sudo lsmod |grep snd
> snd_usb_audio         315392  3
> snd_usbmidi_lib        40960  1 snd_usb_audio
> snd_rawmidi            45056  1 snd_usbmidi_lib
> snd_seq_device         16384  1 snd_rawmidi
> mc                     61440  1 snd_usb_audio
> snd_hda_codec_hdmi     73728  2
> snd_hda_intel          57344  3
> snd_intel_dspcfg       28672  1 snd_hda_intel
> soundwire_intel        45056  1 snd_intel_dspcfg
> snd_soc_core          315392  1 soundwire_intel
> snd_compress           32768  1 snd_soc_core
> snd_hda_codec         172032  2 snd_hda_codec_hdmi,snd_hda_intel
> snd_hda_core          110592  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
> snd_hwdep              16384  2 snd_usb_audio,snd_hda_codec
> snd_pcm               135168  8 
> snd_hda_codec_hdmi,snd_hda_intel,snd_usb_audio,snd_hda_codec,soundwire_intel,snd_compress,snd_soc_core,snd_hda_core
> snd_timer              49152  1 snd_pcm
> snd                   110592  24 
> snd_seq_device,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_usb_audio,snd_usbmidi_lib,snd_hda_codec,snd_timer,snd_compress,snd_soc_core,snd_pcm,snd_rawmidi
> soundcore              16384  1 snd
> usbcore               323584  6 
> xhci_hcd,snd_usb_audio,usbhid,snd_usbmidi_lib,btusb,xhci_pci
> --8<---------------cut here---------------end--------------->8---
> 
> when I say "modprobe -r snd_usb_audio". It says "Module snd_usb_audio is
> in use". I tried with "-f" option as well. Still cannot unload. Then I
> tried to it again after "alsactl kill quit"; but still cannot unload.

Something is keeping the module busy, but according to lsmod it's not 
another module.

In case you get any output from

    lsof | grep /dev/snd

    (this needs root or sudo)

try stopping the applications listed in the first column (the second 
column is the process number).

Kind regards,
Andrei
-- 
http://wiki.debian.org/FAQsFromDebianUser

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