I have found the "problem". I have run "alsamixer" and only from there is possible to re-enable 6 channels. It's not possible to fix it from pavucontrol
Anyway, before closing the bug think about the following and try to see things from a newbie perspective: it seems that gnome-alsa-mixer does not belong to default installation anymore. And that's fine, as we don't want so many tool doing almost same things, but we want ONE tool: pavucontrol How can the newbie enable the 6 channels? Should he use "alsamixer" from console? He has no idea what console and alsamixer are. Furthermore, why newbie, should search google to find out that he has to write "model=3stack-6ch" alsa-base.conf Enabling the 6 channels during module load, should be done thru some tool. Enabling 6 channels from alsamixer should be avoided if you don't want to use these tools anymore. -- audio surround 5.1 stopped working after updating https://bugs.launchpad.net/bugs/450336 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
