https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/plain/Documentation/sound/alsa /HD-Audio.txt
try enable trace of hda_unsol_event , normally one unsol_event for the plugged/un plugged event instead of flooding events Tracepoints ~~~~~~~~~~~ The hd-audio driver gives a few basic tracepoints. `hda:hda_send_cmd` traces each CORB write while `hda:hda_get_response` traces the response from RIRB (only when read from the codec driver). `hda:hda_bus_reset` traces the bus-reset due to fatal error, etc, `hda:hda_unsol_event` traces the unsolicited events, and `hda:hda_power_down` and `hda:hda_power_up` trace the power down/up via power-saving behavior. Enabling all tracepoints can be done like ------------------------------------------------------------------------ # echo 1 > /sys/kernel/debug/tracing/events/hda/enable ------------------------------------------------------------------------ then after some commands, you can traces from /sys/kernel/debug/tracing/trace file. For example, when you want to trace what codec command is sent, enable the tracepoint like: ------------------------------------------------------------------------ # cat /sys/kernel/debug/tracing/trace # tracer: nop # # TASK-PID CPU# TIMESTAMP FUNCTION # | | | | | <...>-7807 [002] 105147.774889: hda_send_cmd: [0:0] val=e3a019 <...>-7807 [002] 105147.774893: hda_send_cmd: [0:0] val=e39019 <...>-7807 [002] 105147.999542: hda_send_cmd: [0:0] val=e3a01a <...>-7807 [002] 105147.999543: hda_send_cmd: [0:0] val=e3901a <...>-26764 [001] 349222.837143: hda_send_cmd: [0:0] val=e3a019 <...>-26764 [001] 349222.837148: hda_send_cmd: [0:0] val=e39019 <...>-26764 [001] 349223.058539: hda_send_cmd: [0:0] val=e3a01a <...>-26764 [001] 349223.058541: hda_send_cmd: [0:0] val=e3901a -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1213769 Title: [ASUS P8Z68-V PRO, Realtek ALC892, Green Line Out, Rear] Popping sound or crackle every few seconds while playing audio To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1213769/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs