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Published 20 hours ago • verified publisher icon rockowitz

verification failed for feature 10

Open Edesem opened this issue 3 years ago • 3 comments

Trying to change the brightness of my main monitor. Using sudo ddcutil -d 2 setvcp 10 brightness_level however it returns Verification failed for feature 10

Running the command sudo ddcutil -d 1 setvcp 10 brightness_level and it works fine, So idk....

Edesem avatar Feb 23 '22 07:02 Edesem

Please submit the output of ddcutil interrogate as an attachment.

rockowitz avatar Feb 23 '22 08:02 rockowitz

ddcutil_interrogate.txt

Edesem avatar Feb 23 '22 08:02 Edesem

My understanding of your environment is as follows:

  • The video card is an MSI GeForce GTX 1060 with 1 DVI connector, 1 HDMI connector, and 3 DP connectors.
  • You are using Nvidia's proprietary video driver.
  • Display 1 is /dev/i2c-4. The Acer B277 uses the HDMI connector.
  • Display 2 is /dev/i2c-5. The Acer XB271HB uses a DisplayPort connector.
  • You are not using the special settings sometimes required for the Nvidia driver

To determine: Does the monitor brightness change but verification fail, or is the verification correct that the brightness hasn't changed.

Suggestions:

  • If the monitor changes brightness correctly but the verification fails, use option --noverify.
  • Apply the special Nvidia settings.
  • Give the monitor more time to respond. Use option --sleep-multiplier 2.0
  • Since the problem appears only on the DP connected monitor, try using the DVI connector instead.

rockowitz avatar Feb 23 '22 21:02 rockowitz