Properly fix headphone noise on the XPS 13 and other ALC256 devices
Get series with b4
b4 am [email protected]Versions newest first · linked by author and title
- v2 Latest3 patches 3 repliesIn review
- v13 patches 3 repliesSuperseded
Changes in v2 from the cover letter
- Change fixed value from 0x4727 to 0x5757, which should behave identically, on advice from Kailang.
Patches in v2 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/3 | ALSA: doc: Document PC Beep Hidden Register on Realtek ALC256Documentation/ Documentation/ | +130 | 1 reply | |
| 2/3 | ALSA: hda/realtek - Set principled PC Beep configuration for ALC256sound/ | +9 | 0 replies | |
| 3/3 | ALSA: hda/realtek - Remove now-unnecessary XPS 13 headphone noise fixupsDocumentation/ sound/ | +0 | 1 reply |
Reviews trailers per patch
No Reviewed-by, Acked-by or Tested-by trailers for v2 yet.
Cover letter [PATCH v2 0/3] Properly fix headphone noise on the XPS 13 and other ALC256 devices
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
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
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2.25.2