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Filename Latest commit message Latest commit date
Hui Wang 2a2ae4831f ALSA: hda/realtek - Couldn't detect Mic if booting with headset plugged
commit 3f74249057827c5f6676c41c18f6be12ce1469ce upstream.

We found a Mic detection issue on many Lenovo laptops, those laptops
belong to differnt models and they have different audio design like
internal mic connects to the codec or PCH, they all have this problem,
the problem is if plugging a headset before powerup/reboot the
machine, after booting up, the headphone could be detected but Mic
couldn't. If we plug out and plug in the headset, both headphone and
Mic could be detected then.

Through debugging we found the codec on those laptops are same, it is
alc257, and if we don't disable the 3k pulldown in alc256_shutup(),
the issue will be fixed. So far there is no pop noise or power
consumption regression on those laptops after this change.

Cc: Kailang Yang <kailang@realtek.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Link: https://lore.kernel.org/r/20200914065118.19238-1-hui.wang@canonical.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-10-01 13:18:22 +02:00
arch x86/ioapic: Unbreak check_timer() 2020-10-01 13:18:22 +02:00
block
certs
crypto
Documentation dt-bindings: sound: wm8994: Correct required supplies based on actual implementaion 2020-10-01 13:17:58 +02:00
drivers scsi: lpfc: Fix initial FLOGI failure due to BBSCN not supported 2020-10-01 13:18:22 +02:00
fs btrfs: qgroup: fix data leak caused by race between writeback and truncate 2020-10-01 13:18:10 +02:00
include net: qed: Disable aRFS for NPAR and 100G 2020-10-01 13:18:18 +02:00
init exec: Add exec_update_mutex to replace cred_guard_mutex 2020-10-01 13:17:47 +02:00
ipc
kernel bpf: Fix a rcu warning for bpffs map pretty-print 2020-10-01 13:18:19 +02:00
lib
LICENSES
mm mm: validate pmd after splitting 2020-10-01 13:18:21 +02:00
net lib80211: fix unmet direct dependendices config warning when !CRYPTO 2020-10-01 13:18:20 +02:00
samples
scripts
security device_cgroup: Fix RCU list debugging warning 2020-10-01 13:18:13 +02:00
sound ALSA: hda/realtek - Couldn't detect Mic if booting with headset plugged 2020-10-01 13:18:22 +02:00
tools objtool: Fix noreturn detection for ignored functions 2020-10-01 13:18:15 +02:00
usr
virt KVM: arm64: vgic-its: Fix memory leak on the error path of vgic_add_lpi() 2020-10-01 13:17:56 +02:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
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COPYING
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Kconfig
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README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.