On 06/14/2018 10:16 AM, Tanu Kaskinen wrote: > On Sat, 2018-06-02 at 10:36 -0400, Colin Beckingham wrote: >> On May 25 openSUSE released a new distro update Leap 15 including >> pulseaudio 11.1 >> While in general sound works very well, there are occasional loud clicks >> from default speakers >> These loud clicks occur when loading a page in a browser or launching >> Audacity for example >> A web page will begin to load and all will be quiet until some >> advertising element loads >> at which point there may be, or may not be, a short set of loud clicks >> from the speakers >> even if the speakers are not set as the default device. >> Once these initial clicks are done the rest of any true audio plays >> correctly. >> >> If the sound device has been recently used then there likely will be no >> click, >> but after say 20 minutes of no audio activity then calling one of these >> applications >> even if it does not play any audio, will very likely produce these >> initial loud clicks. >> >> Not sure how to troubleshoot this to get more info. >> This behaviour was not seen in the previous version of openSUSE. >> Any suggestions for next step? > Does this happen without pulseaudio? Try this: > > pasuspender -- bash > aplay -f cd -D hw:0 /dev/zero > exit > > The first command starts a new shell, and while the shell runs, > pulseaudio won't touch the hardware. The last command exits the shell, > at which point pulseaudio will again access the hardware. The aplay > command will play silence - does that produce the same clicks? > > This might be fixable in the kernel driver, here are instructions for > filing alsa bugs: http://alsa-project.org/main/index.php/Bug_Tracking > Thanks for this nice suggestion. As you say, suspending pulseaudio and then running the aplay (in my case 'aplay -f cd -D hw:1,0 /dev/zero' fits the bill) does produce the clicking. Clearly an alsa issue. Many thanks.
