Thanks for pointing this simple test out, Roberto — they don't sound simultaneously. Skype (and aplay, vlc, all stuff like that) are useless unless I close the page with a YouTube video in Firefox (simply pausing or stopping the video doesn't make no good). But anyway, after closing that page ALSA stuff starts sounding again, which was absolutely not the case when I first reported this bug. There is some progress anyway.
By the way, YouTube is not the only good test for this issue: having a video running (or even paused) in Totem effectively blocks ALSA sound as well. At this point I revoke my statement about this problem having been resolved. :)
Thanks for pointing this simple test out, Roberto — they don't sound simultaneously. Skype (and aplay, vlc, all stuff like that) are useless unless I close the page with a YouTube video in Firefox (simply pausing or stopping the video doesn't make no good). But anyway, after closing that page ALSA stuff starts sounding again, which was absolutely not the case when I first reported this bug. There is some progress anyway.
By the way, YouTube is not the only good test for this issue: having a video running (or even paused) in Totem effectively blocks ALSA sound as well. At this point I revoke my statement about this problem having been resolved. :)