On Mon, 30 Mar 2020 18:09:36 +0200, Thomas Hebb wrote: > > > The root cause of various pervasive audio problems on the XPS 13 > 9350/9360, mostly relating to the headphone jack, turns out to be an > undocumented feature of the ALC256 and similar codecs that routes audio > along paths not exposed in the HDA node graph. The best we've had so far > to configure this feature is magic numbers provided by Realtek, none of > which have fully fixed all issues. > > This series documents the "PC Beep Hidden Register", which controls the > feature and which I've reverse engineered using black box techniques, > and uses my findings to hopefully fix the headphone issues on my XPS 13 > once and for all. > > Changes in v2: > - Change fixed value from 0x4727 to 0x5757, which should behave > identically, on advice from Kailang. > > Thomas Hebb (3): > ALSA: doc: Document PC Beep Hidden Register on Realtek ALC256 > ALSA: hda/realtek - Set principled PC Beep configuration for ALC256 > ALSA: hda/realtek - Remove now-unnecessary XPS 13 headphone noise > fixups Now applied all three patches. The patch 2 had an incorrect Fixes tag (pointing to the stable commit instead of the original commit) so I corrected locally. thanks, Takashi
