Feature 0x60 does not support verification

[daher13]

I'm trying to change feature 60 (Input Source) to the second option: Feature: 60 (Input Source) Values: 11: HDMI-1 12: HDMI-2 Using the command: ddcutil -v -d 1 setvcp 60 12

But it is returning: Feature 0x60 does not support verification Am I using the correct command? How to fix that?

[rockowitz]

@daher13 This is a significant change to my prior response*.

The message you are seeing, which should occur only for verbose output, is purely informational. For most features, a new value is automatically read for verification after it has been set. However, for some features, this is not done as it does not make sense. In particular, once the input device has been changed it's most likely that trying to read the current value from the original input device will fail. I will look at changing the message to make clearer that it isn't an error.

The message can also be avoided by using the --noverify option.

[daher13]

The monitor blinks, but don't changed the input to another.

[rockowitz]

This is a different question. Assuming the values for HDMI-1 and HDMI-2 conform to the MCCS specification and are x11 and x12 on your monitor, you need to write ddcutil setvcp 60 x12*. Without the "x", the decimal value 12 becomes x0c.

By convention VCP feature codes are always referred to by the their hex value, so feature x60 can also be referred to as 60. However, in all other situations, values can either be decimal or hexadecimal, and so require "x" to disambiguate.

[daher13]

Don't works yet. I'm trying: ddcutil --noverify -v -d 1 setvcp 60 x0c And tryed to use x60 too

[rockowitz]

HDMI-2 is 0x12 = 18. x0c is the value for Component video 1

i.e. you want ddcutil setvcp 60 x12 or ddcutil setvcp x60 x12

For values, see ddcutil vcpinfo x60 --verbose

[daher13]

Didn't worked too. The verbose command output is: Output level: Verbose Reporting DDC data errors: false Trace groups active: none Traced functions: none Traced files: none Force I2C slave address: false User defined features: disabled

VCP code 60: Input Source Selects active video source MCCS versions: 2.0, 2.1, 3.0, 2.2 MCCS specification groups: Miscellaneous ddcutil feature subsets: Attributes (v2.0): Read Write, Non-Continuous (simple) Attributes (v2.1): Read Write, Non-Continuous (simple) Attributes (v3.0): Read Write, Table (normal) Attributes (v2.2): Read Write, Non-Continuous (simple) Simple NC values: 0x01: VGA-1 0x02: VGA-2 0x03: DVI-1 0x04: DVI-2 0x05: Composite video 1 0x06: Composite video 2 0x07: S-Video-1 0x08: S-Video-2 0x09: Tuner-1 0x0a: Tuner-2 0x0b: Tuner-3 0x0c: Component video (YPrPb/YCrCb) 1 0x0d: Component video (YPrPb/YCrCb) 2 0x0e: Component video (YPrPb/YCrCb) 3 0x0f: DisplayPort-1 0x10: DisplayPort-2 0x11: HDMI-1 0x12: HDMI-2

I tried to exec with DisplayPort values, but monitor input didn't changed

[rockowitz]

I'm at a loss for what else to add. The vcpinfo output is telling you what all the possible values are for feature x60, according to the MCCS (Monitor Control Command Set) spec. Per the spec, the values for HDMI-1 and HDMI-2 are x11 and x12. No monitor implements all the possible values, and unfortunately, there are monitors that don't adhere to the spec. You'll just have to test to determine what the actual values are for your monitor. The capabilities command, which interprets the capabilities string reported by your monitor, can be helpful here, but its output is sometimes incorrect.

[daher13]

I understood. I think that the monitor don't accept this function. Thank you!

[denilsonsa]

I think this issue can be closed.