On 07/02/17 22:07, bob prohaska wrote:
> Just to wrap things up, the solution turned out to be adding
> /boot/config.txt containing
>
> dtparam=audio=on
>
> as the only entry. After reboot audio works as before.

hmmm... interesting, the /boot files were causing it.

those are documented, just have to look [hard] for the info

My next suggestion would've been to re-image the SD using the latest
bootable image, if you hadn't found this.

another possibility might be to use 'dist-upgrade' as well as 'upgrade'
with the apt-get commands to upgrade your system.  Sometimes that will
do things to fix problems *like* that.

(I'm a long-time Debian user, so I've seen various problems in upgrading
before, not a new situation, just different details)

--- SoupGate-Win32 v1.05