[Bug 1926547] Re: Add Dell Privacy Mic Mute Key mapping

[Andy Chi]

Upload debdiff of focal.

** Patch added: "systemd_245.4-4ubuntu3.7.debdiff"
   https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1926547/+attachment/5493226/+files/systemd_245.4-4ubuntu3.7.debdiff

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https://bugs.launchpad.net/bugs/1926547

Title:
  Add Dell Privacy Mic Mute Key mapping

Status in OEM Priority Project:
  New
Status in systemd package in Ubuntu:
  New

Bug description:
  [Impact]

   * Dell introduces new function called Dell Privacy, it utilizes
  hardware mute to control audio and camera. The commit map the reported
  key event to mic mute for making userspace can work as before, "Mic
  Mute" dialog pop-up while the mic mute button is pressed.

  [Test Plan]

   * Use a Dell machine, which has Dell privacy function, and press mic mute key.
     GUI will pop up "Mic Mute" icon.

  [Where problems could occur]

   * This change adds key event mapping in hwdb, which won't impact
  other hardware.

  [Other Info]

   * The change can only work with kernel commit on some specific hardware, ex. Latitude 9520. The commit series is "hardware-privacy-implementation-for-dell-laptop" in alsa-devel kernel tree.
     https://patchwork.kernel.org/project/alsa-devel/list/?series=465445
   * This change has been verified on Dell machine.

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