I also have the sound problem. While trying to solve it, I also encounter various other error messages. Trying to fix things, I get messages in Terminal that various updates fail. This is one of them I have been trying to solve: Errors were encountered while processing: grub-efi-amd64-signed
When I restart the Atomic Pi, it takes exactly 2 minutes and 41 seconds until I get the login screen. The screen says
Checking media presence......
Media Present......
Start PXE over IPv4.
Then after a while, it changes to the same, except IPv6
(I have an Ethernet cable connected to the router, because the WiFi is very weak/slow. Do I need to buy a WiFi antenna and attach it somewhere?)
I didn't insert any memory card, is that needed? The following is connected (I got the Atomipc Pi with breakout board):
HDMI monitor
USB keyboard (no hub)
USB mouse dongle (for wireless mouse) on breakout board USB port
5V 6A power supply to the breakout board green connector
Ethernet cable directly into router
I changed the sign on name and password, and I set a root password.
The sound doesn't work. If I start the test mentioned in another thread, I get white noise in left and right channel, using address 0,2. I have been where I could open the volume control, but now when I open it to settings, it says something about cannot connect, trying again in 5 seconds.
Youtube doesn't work in Chromium nor Firefox. It loads up but a circular loading
rotating arrow is all I get. If I log into Facebook, I can see videos. But a few minutes of Facebook or other feature rich websites, makes the browser and eventually the entire Ubunto crash. To an extent where even CTRL-ALT-DEL doesn't work any more.
My experience with Raspberry Pi and Unix/Linux/Ubuntu is quite limited (Normally using Max OS X)