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| author | Kai-Heng Feng <kai.heng.feng@canonical.com> | 2019-10-03 12:39:19 +0800 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2019-10-07 03:57:12 +0200 |
| commit | 1099f48457d06b816359fb43ac32a4a07e33219b (patch) | |
| tree | 06b921cb021c8cf937d7b798ae20b355e066e34b /fs/iomap | |
| parent | da0c9ea146cbe92b832f1b0f694840ea8eb33cce (diff) | |
| download | linux-1099f48457d06b816359fb43ac32a4a07e33219b.tar.bz2 | |
ALSA: hda/realtek: Reduce the Headphone static noise on XPS 9350/9360
Headphone on XPS 9350/9360 produces a background white noise. The The
noise level somehow correlates with "Headphone Mic Boost", when it sets
to 1 the noise disappears. However, doing this has a side effect, which
also decreases the overall headphone volume so I didn't send the patch
upstream.
The noise was bearable back then, but after commit 717f43d81afc ("ALSA:
hda/realtek - Update headset mode for ALC256") the noise exacerbates to
a point it starts hurting ears.
So let's use the workaround to set "Headphone Mic Boost" to 1 and lock
it so it's not touchable by userspace.
Fixes: 717f43d81afc ("ALSA: hda/realtek - Update headset mode for ALC256")
BugLink: https://bugs.launchpad.net/bugs/1654448
BugLink: https://bugs.launchpad.net/bugs/1845810
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Link: https://lore.kernel.org/r/20191003043919.10960-1-kai.heng.feng@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'fs/iomap')
0 files changed, 0 insertions, 0 deletions