CA0132: Only stereo with Creative Soundblaster ZxR

[Erik Steiner]

I have a 5.1 sound system that is connected via three 3.5 mm audio cables with my Sound Blaster ZxR: Front Left, Center, Front Right, Rear Left, Rear Right, LFE

I only get sound from "Front Left"/"Front Right". All other speakers don't make a sound. I tested Ubuntu 19.04, Ubuntu 19.10, Manjaro 18.10, different Kernels and the Sound Blaster Patch from reddit, nothing helped. After all these tests, I started again with a fresh Ubuntu 19.10 installation with this output from "alsa information script": http://alsa-project.org/db/?f=c9d4adfbc5441c4975b6e6c7a6fb3cbfc201158a

Only thing that I did was changing the default audio device to my ZxR. Otherwise my NVIDIA graphics card is selected. I did that with ~/.asoundrc:
defaults.ctl.!card "Creative"
defaults.pcm.!card "Creative"
defaults.timer.!card "Creative"

Interestingly I decided to install Windows 10 on my second drive in dual boot mode.
I noticed that when I start Windows all speakers are working. Then I reboot to Ubuntu and all speakers are working, too. This effect will vanish if I shut down my PC and start directly to Ubuntu.
So something happens on Windows that is kept while rebooting to Ubuntu..

I already reported this issue at bugzilla.kernel.org:
https://bugzilla.kernel.org/show_bug.cgi?id=205315