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

Launchpad Bug Tracker 1963628 at bugs.launchpad.net
Fri Mar 4 07:47:36 UTC 2022


You have been subscribed to a public bug by Sebastien Bacher (seb128):

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

** Affects: iio-sensor-proxy (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: focal jammy
-- 
Force IIO_SENSOR_PROXY_TYPE to iio-buffer-als for some Dell models
https://bugs.launchpad.net/bugs/1963628
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