alsa/hda: The sound output is abnormal when the balance is on center after switch from the audio speaker to headset on a Dell AIO

[Hui Wang]

Since this patch is cced to stable kernel, I only send this patch
to oem-5.6 kernel since oem project needs it, other ubuntu kernels
will merge this patch with stable update.

[Impact]
The sound output is abnormal when the balance is on center after
switch from the audio speaker to headset on a Dell AIO

[Fix]
Realtek engineer submit a patch to usptream, I backport this patch
to ubuntu oem kernel.

[Test]
plug a speaker, plug out this speaker, then plug a headset, play some
sound from headset, the sound quality is pretty good.

[Regression Potential]
This SRU could make some Dell AIO not work well on audio output, like
can't output sound or output poor quality sound. but this posibility is
low since we tested this patch on a couple of dell AIO, all worked well.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

[Launchpad Janitor (janitor)]

This bug was fixed in the package linux-oem-5.6 - 5.6.0-1036.39

---------------
linux-oem-5.6 (5.6.0-1036.39) focal; urgency=medium

  * focal/linux-oem-5.6: 5.6.0-1036.39 -proposed tracker (LP: #1906396)

  * Prevent thermal shutdown during boot process (LP: #1906168)
    - SAUCE: thermal: core: Add indication for userspace usage
    - SAUCE: thermal: int340x: Indicate userspace usage
    - SAUCE: thermal: intel: intel_pch_thermal: Indicate userspace usage

  * alsa/hda: The sound output is abnormal when the balance is on center after
    switch from the audio speaker to headset on a Dell AIO (LP: #1905808)
    - ALSA: hda/realtek - Fixed Dell AIO wrong sound tone

  * [SRU][OEM-5.6] UBUNTU: SAUCE: Fix brightness control on BOE 2270 panel
    (LP: #1904991)
    - SAUCE: drm/i915: Force DPCD backlight mode for BOE 2270 panel

  * Use ACPI S5 for reboot (LP: #1904225)
    - PM: ACPI: reboot: Use S5 for reboot

 -- Timo Aaltonen <email address hidden> Wed, 02 Dec 2020 09:55:46 +0200