Ubuntu
linux package

  1. Bug #1551880
  2. Comment #7

Comment 7 for bug 1551880

Revision history for this message
der_eismann (der-eismann) wrote :

Okay okay, after some hours investigating, here are my thoughts:
- Still no idea why the audio device was missing at all at the beginning. Re-appeared, no problems since then.
- I2S sound is working fine in kernel 4.4.
- But the Ubuntu kernel keeps using the CONFIG_ACPI_REV_OVERRIDE_POSSIBLE kernel flag.
-> Audio continues to operate in HDA mode, although not necessary.
- Arch removed this flag for kernel 4.4 (https://bugs.archlinux.org/task/47710)
- Tried to recompile kernel with CONFIG_ACPI_REV_OVERRIDE_POSSIBLE=n, but ran out of space.
- Discovered the acpi_rev_override kernel parameter, going to test a bit now if this helps.