This bug was fixed in the package linux-oem-osp1 - 5.0.0-1043.48

---------------
linux-oem-osp1 (5.0.0-1043.48) bionic; urgency=medium

  * bionic/linux-oem-osp1: 5.0.0-1043.48 -proposed tracker (LP:
#1867111)

  * All PS/2 ports on PS/2 Serial add-in bracket are not working after S3
    (LP: #1866734)
    - SAUCE: Input: i8042 - Fix the selftest retry logic

  * r8152 init may take up to 40 seconds at initialization with Dell WD19/WD19DC
    during hotplug (LP: #1864284)
    - UBUNTU SAUCE: r8151: check disconnect status after long sleep

  * Miscellaneous Ubuntu changes
    - [Config] Bump the GCC version

 -- Timo Aaltonen <timo.aalto...@canonical.com>  Thu, 12 Mar 2020
11:14:40 +0200

** Changed in: linux-oem-osp1 (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1864576

Title:
  alsa/hda/realtek: fix a mute led regression on Lenovo X1 Carbon

Status in linux package in Ubuntu:
  Fix Released
Status in linux-oem package in Ubuntu:
  New
Status in linux-oem-osp1 package in Ubuntu:
  Invalid
Status in linux source package in Bionic:
  Fix Committed
Status in linux-oem source package in Bionic:
  Fix Released
Status in linux-oem-osp1 source package in Bionic:
  Fix Released
Status in linux source package in Eoan:
  Fix Committed
Status in linux source package in Focal:
  Fix Released

Bug description:
  [Impact]
  The mute led couldn't work after applying the FIXUP_SPEAKER2_TO_DAC1.

  [Fix]
  Chain a fixup to let mute led work.

  [Test Case]
  boot the system, press mute button, the led will work.

  
  [Regression Risk]
  Low, this patch is specific to LENOVO X1 Carbon machines. And
  I tested this patch on Lenovo and Dell machines.

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