[Bug 1963628] Re: Force IIO_SENSOR_PROXY_TYPE to iio-buffer-als for some Dell models

[Yuan-Chen Cheng]

** Changed in: oem-priority
   Importance: Undecided => High

** Changed in: oem-priority
     Assignee: (unassigned) => Yao Wei (medicalwei)

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https://bugs.launchpad.net/bugs/1963628

Title:
  Force IIO_SENSOR_PROXY_TYPE to iio-buffer-als for some Dell models

Status in OEM Priority Project:
  New
Status in iio-sensor-proxy package in Ubuntu:
  Fix Committed

Bug description:
  We are encountering issues, that when enabling some Dell laptops, the readings
  from iio-poll-als are unstable, or could freeze on certain value.  On these
  systems they have ENV{IIO_SENSOR_PROXY_TYPE}="iio-poll-als iio-buffer-als", and
  removing iio-poll-als makes reading stable.

  This adds workaround to the affected Dell laptop models which may equip with
  ALS.

  [Impact]

   * Only models matching the same device BIOS IDs are affected.

  [Test Plan]

   * Pick devices which BIOS IDs are listed in the patch, and test
  whether it's ambient light sensors are working properly without
  unexpected brightness flickers.

  [Where problems could occur]

   * Machines matching the same BIOS ID, either having ALS built-in or
  not, but attached ambient light sensors externally (for example,
  ColorHug ALS) might experience failures.

  [Other Info]
   
   * Upstream merge request: https://gitlab.freedesktop.org/hadess/iio-sensor-proxy/-/merge_requests/352

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