Hi Pierre-Louis, Shall we get an update on this issue? On Mon, Dec 9, 2019 at 12:20 PM Mohan Prasath Ramamoorthy < mohan.prasath@xxxxxxxxxxx> wrote: > Hi Pierre-Louis, > > Thank you for your quick response. > > Shall I know what does the below error mean? > > aplay: pcm_write:1940: write error: Input/output error > > On Fri, Dec 6, 2019 at 9:21 PM Pierre-Louis Bossart > <pierre-louis.bossart@xxxxxxxxxxxxxxx> wrote: > > > > > > > > On 12/5/19 11:22 PM, Mohan Prasath Ramamoorthy wrote: > > > Dear All, > > > > > > We are working on external modules of microphone and speaker and we > > > are using the kernel version 3.10.96 > > > > wow, that is one ancient kernel EOL'ed in 2017... > > > > > > > > We are recording with commands like arecord and aplay for recording > > > and playback respectively. > > > > > > While doing the below experiments we could able to observe an issue as > below, > > > > > > 1. With only recording and not playback we haven't faced any issues. > > > 2. With only playback and not recording we haven't faced any issues. > > > > > > 3. By starting an infinite recording in the background and by doing a > > > playback of the audio file(30seconds, the sampling rate of 22050, the > > > channel is stereo), after some iterations, we are facing a below error > > > and we could not able to listen to the audio. > > > > > > Error: aplay: pcm_write:1940: write error: Input/output error > > > > > > Below are the respective commands for recording and playback, > > > > > > 1. arecord -D hw:0,0 -c 2 -f s16_le -r 8000 > /home/ubuntu/mic_testing.wav & > > > 2. aplay -D hw:0,3 audio_22k_c2.wav > > > > > > But when the issues come, we just stopped recording and restarted the > > > recording in the background. After this, the playback is working fine. > > > > > > Also, during the issue came, we have checked for the below properties, > > > > > > 1. I2S has been enabled. Checked under the file: > > > /sys/kernel/debug/clock/clock_tree > > > 2. Driver callbacks have been called. (Checked with the kernel > logs[dmesg]) > > > > > > We would like to know the reason behind this error.? > > > > Sounds typical of an interference between the playback and record > > programming flows, e.g. when changing a shared register. Not all I2S > > tolerate dynamic changes from RX or TX only to full-duplex. > > > > -- > > With Best Regards, > > Mohan Prasath > > VVDN Technologies Pvt Ltd > > Cell: +91 9629768919 > > Web: www.vvdntech.com > -- *With Best Regards,* *Mohan Prasath* VVDN Technologies Pvt Ltd *Cell:* +91 9629768919 Web: www.vvdntech.com -- _Disclaimer: _© 2019 VVDN Technologies Pvt. Ltd. This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful._ _ _ _ __ _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
