Manual setting not loaded consistently

  1. Where did you get the camera module(s)?

  2. Model number of the product(s)?
    Arducam 1080P Low Light WDR USB Camera Module with Metal Case, 2MP 1/2.8" CMOS IMX291 160 Degree Ultra Wide Angle Mini UVC Webcam Board with Microphones - Arducam

  3. What hardware/platform were you working on?
    Ubuntu 20.04

  4. Instructions you have followed. (link/manual/etc.)

apt show v4l-utils

Package: v4l-utils
Version: 1.18.0-2build1
Priority: optional
Section: universe/utils
Origin: Ubuntu
Maintainer: Ubuntu Developers [email protected]
Original-Maintainer: Gregor Jasny [email protected]
Bugs: OpenID transaction in progress
Installed-Size: 2154 kB
Depends: libv4l-0 (= 1.18.0-2build1), libv4l2rds0 (= 1.18.0-2build1), libc6 (>= 2.17), libgcc-s1 (>= 3.0), libstdc++6 (>= 5.2), libudev1 (>= 183)
Breaks: ivtv-utils (<< 1.4.1-2), media-ctl
Replaces: ivtv-utils (<< 1.4.1-2), media-ctl
Homepage: Index of /downloads/v4l-utils
Download-Size: 586 kB
APT-Manual-Installed: yes
APT-Sources: Index of /ubuntu focal/universe amd64 Packages
Description: Collection of command line video4linux utilities

  1. Problems you were having?
    I can’t use manual exposure_absolute + exposure_auto=1(manual) setting without being affected by exposure_auto=3(auto)

I am testing using camset application if I set a manual value for exposure_absolute + exposure_auto=1, change exposure_auto to 3, change the backlight (in my case covering the camera lens), change exposure_auto back to 1 and I can’t use the previous exposure_absolute value anymore.

  1. The dmesg log from your hardware?

  2. Troubleshooting attempts you’ve made?

  3. What help do you need?
    Does anyone know why this happens? Am I missing any setting to get the manual setting consistently?