(Un)Fortunately, it appears the no bass bug (2) is a hardware problem. I also got no bass when testing in Windows.
As for the only top speaker bug (1), I tested two more options in /etc/modprobe.d/alsa-base.conf:
- "model=auto" had the same behavior as the majority.
- "single_cmd=1" didn't fix the speakers, and it broke headphone sensing.
(Un)Fortunately, it appears the no bass bug (2) is a hardware problem. I also got no bass when testing in Windows.
As for the only top speaker bug (1), I tested two more options in /etc/modprobe. d/alsa- base.conf:
- "model=auto" had the same behavior as the majority.
- "single_cmd=1" didn't fix the speakers, and it broke headphone sensing.