On Wed, Aug 11, 2021 at 6:19 PM vishnu <vardhanraj4143@xxxxxxxxx> wrote: > > can you paste output of > arecord -l (list of capture devices). $ arecord -l **** List of CAPTURE Hardware Devices **** card 0: USB [Plantronics .Audio 628 USB], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 > Which device you are using and os. > Does this instance is already open by default? like any video playing or something like that? lsof does not catch it. > > Yes you can stop pulse audio and try.. > > On Wed, Aug 11, 2021 at 6:17 PM Jaroslav Kysela <perex@xxxxxxxx> wrote: >> >> On 11. 08. 21 14:36, Muni Sekhar wrote: >> > Hi All, >> > >> > $ cat /proc/asound/cards >> > 0 [USB ]: USB-Audio - Plantronics .Audio 628 USB >> > Plantronics Plantronics .Audio 628 USB at >> > usb-0000:00:14.0-2, full speed >> > >> > I am using a Plantronics USB Audio headset. >> > >> > $ arecord --device hw:0,0 --channels 2 --format S16_LE --rate 44100Hz x.wav >> > arecord: main:722: audio open error: Device or resource busy >> > >> > >> > 'arecord' command always fails the first time after system boot in my >> > system. But subsequent execution of the 'arecord' command runs fine. >> > >> > >> > I've attached the strace log for the "audio open error: Device or >> > resource busy" failure. Is there any fix available for this issue? >> >> You may check which other task blocks the PCM device: >> >> lsof /dev/snd/pcmC0D0c It does not output any process. $ lsof /dev/snd/pcmC0D0c 1st run: ---------- $ arecord --device hw:0,0 --channels 2 --format S16_LE --rate 44100Hz x.wav arecord: main:722: audio open error: Device or resource busy 2nd run: ---------- $ arecord --device hw:0,0 --channels 2 --format S16_LE --rate 44100Hz x.wav Recording WAVE 'x.wav' : Signed 16 bit Little Endian, Rate 44100 Hz, Stereo ^CAborted by signal Interrupt... >> >> I guess that it will be pulseaudio (device enumeration). >> >> Jaroslav >> >> -- >> Jaroslav Kysela <perex@xxxxxxxx> >> Linux Sound Maintainer; ALSA Project; Red Hat, Inc. -- Thanks, Sekhar
