KDE Plasma Widget for external monitor brightness adjustment

Post by iudqnolq » Tue, Apr 11, 2023, 4:49 PM UTC

crossbowffs wrote: post #31

Neat! I'm working on something very similar for Xfce, but invoking ddcutil natively: https://github.com/apsun/xfce4-ddc-plugin (very much WIP, currently only supports hotkeys and a single monitor) I've found that shelling out to the ddcutil CLI directly tends to be "lossy" - as in, if invoked very quickly (i.e. via keyboard shortcuts), it will tend to race with itself and fail half the time. So far the best solution…

Post by marcosdumay » Tue, Apr 11, 2023, 5:25 PM UTC

Post by alin23 » Tue, Apr 11, 2023, 5:39 PM UTC

KMnO4 wrote: post #33

paol wrote: post #2

Oh I'm definitely trying this. I currently have kb shortcuts defined for brightness up/down that invoke ddcutil. This really ought to be built into every OS. From what I've read, the catch is that DDC implementations are often very buggy and can cause problems, so it would be risky to do this out of the box.

I’d love a database of monitors with good DDC/CI support. You can’t just assume a good or high end monitor will work as you want it to. My Samsung, for example, supports DDC/CI for HDMI but not DisplayPort, so I have to choose between software control and a refresh rate higher than 60Hz. It also only supports a small subset of commands and doesn’t work if the device sending the command isn’t the active display input.…

    SELECT
        regexp_replace("name", ' \(\d+\)$', '') AS name,
        count(ddc) working_ddc_count,
        connection,
        "DisplayProductID",
        "isHiDPI"
    FROM
        displays
    WHERE
        ddc
        AND NOT "kCGDisplayIsVirtualDevice"
        AND NOT "isAirPlayDisplay"
        AND NOT "isTV"
        AND "DisplayProductID" != 0
        AND "DisplayVendorID" NOT IN(7789, 1552) -- Filter out LGs as they don't have a useful name and Apple displays
            AND name NOT LIKE 'Unknown Display%' -- Filter out those in a semi-connected state
        GROUP BY
            name,
            "DisplayProductID",
            connection,
            "isHiDPI"
        ORDER BY
            working_ddc_count DESC;

Post by nierro » Tue, Apr 11, 2023, 6:11 PM UTC

alin23 wrote: post #6

I develop Lunar ( https://lunar.fyi/ ) for controlling monitors on Mac and stumbled upon this gem for Linux which I wanted to share with you. I regularly get asked to recommend something similar to Lunar for Linux and Windows and while there's TwinkleTray for Windows, I didn't have a good recommendation for Linux. Glad this finally exists! A lot of people also use MonitorControl for Mac and might be curious what's th…

Post by davidhi7 » Tue, Apr 11, 2023, 6:40 PM UTC

marcosdumay wrote: post #34

Debian in particular has the ddcci-dkms package that once installed should solve the entire problem and let you control external monitors the same way you control internal ones. I just found it, and I have to restart KDE to see if it worked, so no certainty here yet :)