[Bug 1926280] Re: ALS function lost after suspend/resume

[Brian Murray]

Hello Kai-Chuan, or anyone else affected,

Accepted iio-sensor-proxy into focal-proposed. The package will build
now and be available at https://launchpad.net/ubuntu/+source/iio-sensor-
proxy/2.8-1ubuntu1 in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, what testing has been
performed on the package and change the tag from verification-needed-
focal to verification-done-focal. If it does not fix the bug for you,
please add a comment stating that, and change the tag to verification-
failed-focal. In either case, without details of your testing we will
not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: iio-sensor-proxy (Ubuntu Focal)
       Status: New => Fix Committed

** Tags added: verification-needed verification-needed-focal

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https://bugs.launchpad.net/bugs/1926280

Title:
  ALS function lost after suspend/resume

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

Bug description:
  [Impact]

   * Some Dell machine support ALS (ambient light sensor) will lost function after suspend/resume
     It originally only report iio-buffer-als by udev rule, but the buffer no longer update after
     suspend/resume, the issue can be eliminated by polling in_illuminance_raw node.

  [Test Plan]

   * Boot a machine with ALS support, and check it by
     $ cat /sys/bus/iio/devices/iio:device*/name => see if it contains name als
   * do suspend/stress by
     $ sudo -s
     # for i in `seq 20`; do sleep 5; rtcwake -m mem -s 10; done
   * run monitor-sensor and cover your hand on the light sensor
     $ monitor-sensor
   * if the als function lost, there should be no update of the ambient light sensor anymore

  [Where problems could occur]

   * The change add in_illuminance_raw check and add iio-poll-als to
  IIO_SENSOR_PROXY_TYPE for sensor using raw value.

   * It will keep original IIO_SENSOR_PROXY_TYPE and multiple
  IIO_SENSOR_PROXY_TYPE support, so risk is low for other hardware.

   * Checking on working hardware and run $ monitor-sensor
     it should keep popping Light changed event no matter what operations,
     close lid, suspend/resume, reboot...etc.

  [Other Info]

   * The change is from upstream which has been in groovy and hirsute.
     https://gitlab.freedesktop.org/hadess/iio-sensor-proxy/-/commit/eb8fde8fd246ea6c30a8d4a29d6061b42f7012f2
     https://gitlab.freedesktop.org/hadess/iio-sensor-proxy/-/commit/de1e1ea35aea81a4b5c22cb2458e9686911fb383

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