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arcnmx / ddc-hi-rs

DDC/CI high level crate
MIT License
23 stars 8 forks source link

Error when trying to get capabilities #5

Open Hexalyse opened 2 years ago

Hexalyse commented 2 years ago

Hello,

I've been trying to use your crate unsuccessfully. When trying to get the capabilities of my screen, I get this error :

The unwrap returns thread 'main' panicked at 'called Result::unwrap() on an Err value: Failed to read capabilities string

And the detail is : An error occurred while transmitting data to the device on the I2C bus. (os error -1071241854)'

I'm on Windows, and I don't understand why it's having an error about I2C, while it's supposed to be using winapi to communicate with the screen (and the display.info.backend value indeed is"winapi").

ThalusA commented 2 years ago

I also have this problem, For the i2C error it was from the NVIDIA-API side for me but it's not problematic in my context.

The thing I don't understand is that display.update_capabilities() is never used in ddcset-rs except for winapi but it's implemented in all ddc api. Every time I use this function I get an error saying Failed to read capabilities string.

So my final question, is why and how we should use the update_capabilities method ?