add monitor detection fallback to skip cap check

[braye]

Resolves #101

I'm a total Rust newb - if there's a better way to do this let me know. I basically copied everything from find_display_by_name and skipped the capabilities check. Not the prettiest but it's only twice.

Personally, I'm a fan of "twice is not duplication" ;)

[maximbaz]

Hahaha thanks 😁 Most importantly, do you confirm that this trick solves the issue with your monitors? Just to be sure 😄

[maximbaz]

While I totally agree with "twice is not duplication", rust is very pleasant language to build abstractions on 😁 What do you think about the idea I just pushed? And does it actually work? 😅

[braye]

Oh, your approach is much better! That's pretty much what I was thinking would be the best solution but I didn't quite know how to implement it.

I can confirm that 34baa1b finds both monitors fine:

[2024-03-30T21:14:32Z DEBUG wluma] Using Config {
        als: Time {
            thresholds: {
                13: "bright",
                9: "dim",
                16: "normal",
                7: "dark",
                11: "normal",
                18: "dark",
                0: "night",
                20: "night",
            },
        },
        output: [
            DdcUtil(
                DdcUtilOutput {
                    name: "DELL U2415 CFV9N85Q0HWS",
                    capturer: None,
                    min_brightness: 1,
                },
            ),
            DdcUtil(
                DdcUtilOutput {
                    name: "LG ULTRAGEAR 103NTPC9A464",
                    capturer: None,
                    min_brightness: 1,
                },
            ),
        ],
    }
[2024-03-30T21:14:37Z DEBUG wluma::brightness::ddcutil] Discovered displays (check_caps=true): ["DELL U2415 CFV9N85Q0HWS"]
[2024-03-30T21:14:37Z DEBUG wluma::brightness::ddcutil] Using display 'DELL U2415 CFV9N85Q0HWS' for config 'DELL U2415 CFV9N85Q0HWS' (check_caps=true)
[2024-03-30T21:14:38Z ERROR wluma::brightness::controller] Unable to get brightness value: DDC/CI error: invalid DDC/CI length
[2024-03-30T21:14:38Z DEBUG wluma::brightness::ddcutil] Discovered displays (check_caps=true): []
[2024-03-30T21:14:38Z DEBUG wluma::brightness::ddcutil] Discovered displays (check_caps=false): ["LG ULTRAGEAR 103NTPC9A464", "DELL U2415 CFV9N85Q0HWS"]
[2024-03-30T21:14:38Z DEBUG wluma::brightness::ddcutil] Using display 'LG ULTRAGEAR 103NTPC9A464' for config 'LG ULTRAGEAR 103NTPC9A464' (check_caps=false)
[2024-03-30T21:14:38Z INFO  wluma] Continue adjusting brightness and wluma will learn your preference over time.
[2024-03-30T21:14:56Z ERROR wluma::brightness::controller] Unable to get brightness value: DDC/CI error: invalid DDC/CI length
[2024-03-30T21:14:57Z ERROR wluma::brightness::controller] Unable to get brightness value: DDC/CI I2C error: Remote I/O error (os error 121)
[2024-03-30T21:14:58Z ERROR wluma::brightness::controller] Unable to get brightness value: DDC/CI I2C error: Remote I/O error (os error 121)
[2024-03-30T21:14:58Z ERROR wluma::brightness::controller] Unable to get brightness value: DDC/CI I2C error: Remote I/O error (os error 121)
[2024-03-30T21:14:58Z ERROR wluma::brightness::controller] Unable to get brightness value: DDC/CI error: invalid DDC/CI length
[2024-03-30T21:14:58Z ERROR wluma::brightness::controller] Unable to get brightness value: DDC/CI error: Expected DDC/CI length bit
[2024-03-30T21:14:58Z ERROR wluma::brightness::controller] Unable to get brightness value: DDC/CI error: invalid DDC/CI length
[2024-03-30T21:14:58Z ERROR wluma::brightness::controller] Unable to get brightness value: DDC/CI error: Expected DDC/CI length bit
[2024-03-30T21:14:58Z DEBUG wluma::predictor::controller] [LG ULTRAGEAR 103NTPC9A464] Learning Entry { lux: "bright", luma: 0, brightness: 50 }
[2024-03-30T21:15:02Z ERROR wluma::brightness::controller] Unable to get brightness value: DDC/CI error: Expected DDC/CI length bit
[2024-03-30T21:15:05Z DEBUG wluma::predictor::controller] [DELL U2415 CFV9N85Q0HWS] Learning Entry { lux: "bright", luma: 0, brightness: 60 }

Ignoring all the DDC/CI errors of course, it can read brightness changes from both monitors.

[maximbaz]

That's awesome! Glad that we are on the same page, and that it works as expected, merging then, and thanks for all your help! 🙏