No sound in flashplayer with linux-c7

[Serge Volkov]

Hi, All!

I use www/flashplayer in Firefox on FreeBSD 12.0-RELEASE-p7 with KDE 
Plasma 5. This week I updated the linux_base-c6 with all linux packages 
to linux c7. After that, the sound disappeared in flashplayer. I also 
rebuilt the flashplayer from the ports. But nothing has changed. No 
sound. With the linux c6 the sound in flashplayer worked fine.

Can anyone help solve problem with sound in flashplayer on linux c7?

-- 
Regards,
Serge Volkov