[Bug 1930910] Re: Fix micmute hotkeys on HP ProBooks

[Rex Tsai]

OEM team need the patch in focal to meet the project schedule by 2021-07-09.

The upstream is not released yet.
% git tag --contains=a7161e0288d1
v249-rc1
v249-rc2

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https://bugs.launchpad.net/bugs/1930910

Title:
  Fix micmute hotkeys on HP ProBooks

Status in HWE Next:
  New
Status in OEM Priority Project:
  New
Status in systemd package in Ubuntu:
  Fix Committed
Status in systemd source package in Focal:
  In Progress
Status in systemd source package in Groovy:
  In Progress
Status in systemd source package in Hirsute:
  In Progress
Status in systemd source package in Impish:
  Fix Committed

Bug description:
  [Impact]
  Micmute hotkey on many HP ProBooks don't work.

  [Fix]
  Commit a7161e0288d1 ("hwdb: Add ProBook to use micmute hotkey"), to map AT keyboard's scancode to micmute hotkey.

  [Test]
  With the one-liner fix, micmute hotkey works on all the ProBooks I tested.

  [Where problems could occur]
  The hwdb originally only matches a few ProBooks, the fix changes that to match all ProBook models. So if there's any ProBook that uses the scancode for another purpose, there will be a regression.
  However, the risk is rather slim because HP explicitly states that all ProBooks use the same scancode for mic mute hotkey.

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