On Mon, 30 Mar 2020 09:30:29 +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. Thanks for the patches, all those look interesting and good to apply. But I'd like to get it reviewed by Kailang at first -- in case we might be playing with something untouchable. Kailang, could you review this quickly? Takashi > > 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 > > Documentation/sound/hd-audio/index.rst | 1 + > Documentation/sound/hd-audio/models.rst | 2 - > .../sound/hd-audio/realtek-pc-beep.rst | 129 ++++++++++++++++++ > sound/pci/hda/patch_realtek.c | 49 ++----- > 4 files changed, 139 insertions(+), 42 deletions(-) > create mode 100644 Documentation/sound/hd-audio/realtek-pc-beep.rst > > -- > 2.25.2 >
