Manual setting not loaded consistently

USB UVC Webcams
1

  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?