Try to update flash and Shockwave, I do not know if your drivers are up to date either, but it looks like ALSA looks for the graphics device? [[Upgrade your graphics drivers to use hardware acceleration and WebGL]] Wait, wait, there was an old bug I found, it moved from alsa to oss *Bug 503691 - ALSA is required to build media backends on Linux https://bugs.gentoo.org/show_bug.cgi?id=276354#c5 Work arounds that I found in other forums: *Gentoo [https://forums.gentoo.org/viewtopic-t-923736-start-0.html] *linux questions [http://www.linuxquestions.org/questions/linux-hardware-18/linux-and-alsa-default-sound-card-two-methods-fail-to-set-firefox-chrome-sound-4175479415/] Have you tried these already? I hope this helps.